Nautilus Treadclimber Tc916 Users Manual

Nautilus-treadclimber__tc916_commercial_series_service_manual

Nautilus Commercial Series TreadClimber TC916 Service Manual NLS_TC916_SM_RevD_052107_web Troubleshoot Nautilus Commercial Series TreadClimber TC916 |

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2015-02-05

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Be Strong.™

Service Manual
TreadClimber®, Model TC916
Commercial Series

P/N: 001-7129 Rev D (5/21/2007)

Attention!
This manual is intended for authorized Nautilus or Nautilus certified
service personnel and not for the consumer. There are no user serviceable
parts. Servicing of the Nautilus Commercial Series Treadmill by other than
authorized Nautilus or Nautilus certified service personnel may result in
voiding of the warranty.
For detailed instructions and information on assembly and use for the
Nautilus® Commerical series TREADCLIMBER®, model tC916, refer to the
assembly and owner’s manuals.

7! 2 . ) . '
secure long hair and loose clothing before working near the
treaDCLIMBER® walking surface or TREADLES.

$!.'%2

Table of contents
Important Safety Precautions............. 4
PRODUCT SPECIFICATIONS ........................... 6
Mechanical Service
1.0 Removing The Console ............................................. 7
2.0 A
ccessing The Console For Programming ................ 8
3.0 Removing Rear Step ................................................. 9
4.0 VSD Assembly Grounding .......................................10
5.0 Removing Uprights ................................................. 12
6.0 Removing Base Plastic ........................................... 14
7.0 Belt Tension and Alignment ................................... 15
8.0 Belt and Deck Replacement ................................... 16
9.0 Treadle Adjustment Troubleshooting ..................... 18
10.0 Replacement of Pivot Covers ............................... 24
11.0 Replacement of Hydraulic Cylinders .................... 26
12.0 Vibration Troubleshooting .................................... 28
CARDIO CONSOLE CODES ........................... 30

PARTS LIST
Ordering Replacement Parts ............................................... 33

EXPLODED VIEWS
Working with exploded views ...................................... 37
Base Frame with Drive Motor ...................................... 37
Base Frame with VSD Motor Control Board ................ 37
Base Frame with Dependency Link and
Hydraulic System ..................................................... 38
Dependency Link .......................................................... 38
Treadle Assembly ......................................................... 39
Console Upright Assembly, Rear Step and
Console Assembly ................................................... 39
Base Frame Covers (Right side.) ................................... 40
Base Frame Covers (Left side.) ..................................... 40
Treadle Deck and Belt Assembly (Right side.) ............. 41
Treadle Deck and Belt Assembly (Left side.) ................ 41
Treadle Arm Assembly (Right side.) ............................. 42
Treadle Arm Assembly (Left side.) ............................... 42
Treadle Covers - Top and Bottom (Right side.) ............. 43
Treadle Covers - Top and Bottom (Left side.) ............... 43
ROC Bar Assembly ........................................................ 44
Console Upright and Cover Assembly .......................... 44
Rear Step and Support Platform .................................. 45
ELECTRONIC TROUBLESHOOTING
SUMMARY .................................................... 46
WIRING SCHEMATICS .................................. 51
important contact numbers ............ 58

Nautilus® TreadClimber®, Model TC916 Service Manual

Important safety precautions - save these instructions
IMPORTANT SAFETY INSTRUCTIONS

The following definition applies to the word “Warning” found throughout this manual:
WARNING - Used to call attention to POTENTIAL hazards that could result in personal injury or loss of life.
WHEN USING ELECTRICAL EQUIPMENT ALWAYS FOLLOW THESE BASIC PRECAUTIONS:

7! 2 . ) . '
To reduce the risk of burns, electric shock or injury to persons read and
follow all safety warnings and instructions in this manual.
Secure long hair and loose clothing before use.
Do not use near water!

$!.'%2

READ ALL INSTRUCTIONS BEFORE USING THE MACHINE.
Read this manual in full before operating the TreadClimber® machine. Failure to follow these guidelines can produce
a serious or possible fatal electrical shock hazard or other serious injury. Consult a qualified electrician as required.
1. The controller Stop Key does not turn off the electrical current to the TreadClimber® exercise machine. The
TreadClimber® machine continues to draw power, even when the controller is off. To avoid electric shock, do not
remove TreadClimber® hood or place hands beneath the TreadClimber® exercise machine while the machine is
plugged into a power source.

!4 4 % . 4 ) / .

2. Do not start the TreadClimber® machine when someone else is standing on the walk belts.

3. K eep walk speed and treadle displacement at the lowest settings when getting on and off the TreadClimber®
machine.
4. Keep the area underneath and around the TreadClimber® exercise machine clear.
5. Never position the TreadClimber® exercise machine with the back end (direction of belt travel) facing a wall or
any other objects such as furniture or other pieces of fitness equipment. Failure to keep the rear space of the
machine clear can prevent safe exit of the TreadClimber® machine in an emergency situation such as falling.
Allow a minimum of four feet behind the TreadClimber® exercise machine.

)--%$)!4%!#4)/.2%15)2%$

6. Before each use of this equipment, check the power receptacle for signs of damage. Do not operate the
equipment if the integrity of the power receptacle is in question.

#!54)/.

Important safety precautions
7. To avoid potential safety and electrical problems, replace with manufacturer’s specified parts only.
8. This equipment is classified Class I, Type B, ordinary equipment. Not protected against fluid ingress. Rated for
continuous operation. Do not operate this equipment in the presence of flammable anesthetic mixtures.
9. Do not let liquid enter the controller. If it does, the controller must be inspected and tested for safety by an approved
technician before it can be used again.
10. Increased risk due to leakage current can result if this equipment is not grounded properly.
11. T he TreadClimber® machine must be on an appropriate, dedicated electrical circuit. Nothing else should be
connected to the circuit.
12. Do not stand on the TreadClimber® TC916’s hood or front trim cover.
13. Close supervision is necessary whenever the machine is used by or near children, invalids, or disabled persons.
Failure to follow the conditions set forth below shall limit, to the extent allowed by law, Nautilus Inc. responsibility for
the safety, reliability, and performance of this equipment.
• The Owner’s Manual must be read in full by each owner and trainer before the product is first used. Each user
must be instructed in the proper use of the TreadClimber® machine and its accessories.
•D
o not remove the TreadClimber® hood: dangerous voltages are present. Components are serviceable only by
qualified service personnel.
• The electrical wiring within the TreadClimber® equipment setting and the electrical installation of the
TreadClimber® machine must comply with the applicable local or provincial requirements.
• The equipment must be used in accordance with the instructions for use.
• For further information or instruction on use, maintenance or specifications, please contact your Authorized
Nautilus Fitness Dealer or Service Technician.

Nautilus® TreadClimber®, Model TC916 Service Manual

PRODUCT SPECIFICATIONS
NOTE: A
ll instructions in the manual are given with the orientation
of standing on the TreadClimber® exercise machine facing the
console. The console is the front, while the rear step is the back.
User Weight Capacity:

400 lbs (182 kg)

Speed Range:

0.5 to 6 mph (default set to 4.0 mph) [.8 to 9.5 km/h (default set to 6.4 km/h)]

Treadle Displacement Levels: MIN (half the total displacement) and
MAX (full treadle displacement)
Walk Surface (W x L):

21” x 48” defined by two separate left and right treadmill
belt assemblies (treadles), each treadle 10” x 48” in
length, with a 1” or less separation between the belts.
(Metric Walk Surface: [53 x 122 cm].)

Floor Space (W x L):

36” x 70” / 91.5 x 178 cm

TreadClimber® Weight:

684 lbs / 310 kg

Shipping Weight:

806 lbs / 366 kg

Power Requirements:

110-120 Volt, 50/60 Hz, 16 amp dedicated circuit.
220-240 Volt, 50 Hz, 10 amp dedicated circuit.

Warranty:

3 years - parts, 1 year - labor, 1 year - wear items, and
15 years - frame and AC-motor.
(May vary outside the USA.)

Regulatory Approvals:
CSA Certified, UL Listed
Meets:
FCC - Part 15
Canadian ICES-003 Regulations for Class A apparatus
Meets:
Safety - EN 60335-1
EMC Directive 89/336/EEC
Machinery Directive - 98/37/EC
Low Voltage Directive - 89/336/EEC

Patent Information:

U.S. and International Patents Pending

Model: TC916

Mechanical service

1.0 - REMOVING THE CONSOLE
Tools Needed:

• Phillips head screw driver

• 5/32 Allen bit
Figure 1-1

7! 2 . ) . '
To avoid electrical shock or
damage to the unit you must
power off the unit and make
sure all power has been drained
from the unit and capacitors by
ensuring there are no lighted
leds on the console.

$!.'%2

Figure 1-2

1-1: Turn off the unit and unplug from the wall outlet.

!4 4 % . 4 ) / .

1-2: Remove Button head screws (P/N- SM24162) on
underside of the handles on each side (see Figure 1-1).
1-3: G
ently pull console off evenly from both sides until
cables are exposed (see Figure 1-2).
1-4: Disconnect the 2 cables on the left side
(see Figure 1-3).

)--%$)!4%!#4)/.2%15)2%$Figure 1-3

1-5: D
isconnect the 1 cable on the right side
(see Figure 1-4).

#!54)/.

NOTE: To replace console, reverse instructions.

Figure 1-4

Nautilus® TreadClimber®, Model TC916 Service Manual

Mechanical service
2.0 - ACCESSING THE CONSOLE FOR
PROGRAMMING
Tools Needed:

• Phillips head screw driver
2-1: Turn off the unit.
2-2: Remove six (6) screws (P/N - SM41271) from back
side of console to remove cover and gain access for
programming (see Figure 2-1 and Figure 2-2).
3 screws per side

2-3: Attach FISP connector for software programming to
this connection (see Figure 2-3).
2-4: Turn on the unit.

Figure 2-1

2-5: The LED on the FISP will blink momentarily, then stay
on solid.
2-6: Turn off the unit.
2-7: Remove FISP connector, replace cover and reattach
with six (6) screws (P/N - SM41271).

Figure 2-2:
Exposed console circuit board.

Figure 2-3

Mechanical service

3.0 - REMOVING REAR STEP
Tools Needed:

• Phillips head screw driver

• 5/32 Allen bit

7! 2 . ) . '

Two Middle Screws

To avoid electrical shock or damage
to the unit you must power off the
unit and make sure all power has been
drained from the unit and capacitors by
ensuring there are no lighted leds on
the console.

Figure 3-1

$!.'%2

3-1: Unplug the unit from the power source and ensure
that all power has been drained from the unit.
3-2: Remove two (2) middle screws from Rear Step Cover
(see Figure 3-1).

!4 4 % . 4 ) / .

3-4: Lift and slide step cover plate back to remove
(see Figure 3-2).

3-3: Remove four (4) screws from Step Weldment (see
Figure 3-3).

Figure 3-2

3-5: Replace rear cover by sliding back into place and reinstalling four (4) outer screws.

)--%$)!4%!#4)/.2%15)2%$

3-6: Place Step cover onto Step weldment and reattach
with two (2) screws (see Figure 3-2 and Figure 3-1).

#!54)/.

Removing the step cover plate provides access to the I/O
cables needed for the removal of the uprights.

Four Outer Screws
Figure 3-3

Nautilus® TreadClimber®, Model TC916 Service Manual

Mechanical service

4.0 - VSD ASSEMBLY GROUNDING
Parts Affected:
• Front Trim Cover - P/N: SM17652
• Right Pan Cover - P/N: SM17653
• Right Side Cover - P/N: SM17655
• VSD Assembly, TC916 - P/N: SM17688
• Flat Washer, 1/4 ID x 5/8 OD - P/N: SM22047
• Screw, .250-20 x .75, HX Wash HD P/N: SM27594

Figure 1:

Tools Needed:
• 1/8 Allen Bit
• 3/8 inch Socket or Open End Wrench

7! 2 . ) . '
To avoid the risk of electrocution, shock or
mechanical injury, before performing this
maintenance, ensure that the machine is
unplugged.

$!.'%2

To Install New VSD Ground Improvement:

Figure 2:

4-1: A
djust Right Treadle to maximum step height.
4-2: Remove three (3) screws from Front Trim Cover (P/N

!4 4 % . 4 ) / .
- SM17652). See Figure 1.

4-3: Remove four (4) screws from Right Side Cover (P/N
- SM17655). See Figure 2.
4-4: Remove two (2) screws from Right Pan Cover to access
the VSD Assembly (see Figure 3 and Figure 4).
)--%$)!4%!#4)/.2%15)2%$
CAUTION: ENSURE THAT ALL LIGHTS ARE OFF
ON THE VSD ASSEMBLY BEFORE
CONTINUING - OTHERWISE, YOU MAY
DAMAGE THE BOARD.

#!54)/.

4-5 Disconnect and mark cables (for reconnecting in later step)
from the VSD board.

Mechanical service

4-6: Remove the two (2) VSD Bracket Screws (P/N
- SM27594), then remove the VSD Assmebly (see
Figure 4).

Figure 3:

4-7: Position the new VSD Assembly in place and attach
with the two (2) bracket screws.
4-8: Reconnect the previously marked cables to the VSD
Assembly.
4-9: Reattach all covers and verify that all machine
functions are working properly.

Figure 4:

VSD Bracket
Screws

Nautilus® TreadClimber®, Model TC916 Service Manual 11

Mechanical service

5.0 - REMOVING UPRIGHTS
Tools Needed:

• 1/8 Allen bit

• 5/32 Allen bit

• 3/4 inch Socket

• Phillips head screw driver

7! 2 . ) . '
Detaching and moving the upright portion of
this product requires two people! You must
have a minimum of two people to properly
support the heavy upright structure so the
console does not fall and cause damage to the
unit.

Figure 5-1

$!.'%2
7! 2 . ) . '

To avoid electrical shock or damage
to the unit you must power off the
unit and make sure all power has been
drained from the unit and capacitors by
ensuring there are no lighted leds on
the console.

!4 4 % . 4 ) / .
$!.'%2

Figure 5-2

5-1: Remove the Front Trim Cover (P/N - SM17652), Left
Side Cover (P/N - SM17656), Left Pan Cover (P/N
- SM17654) and Right Side Cover (P/N - SM17655),
Right Pan Cover (P/N - SM17653).

5-2: Remove the Rear Step Cover and weldment (see
)--%$)!4%!#4)/.2%15)2%$
Figure 5-1).

Cable connector

!4 4 % . 4 ) / .
#!54)/.
5-3: Remove the Rear Plastic Cover (P/N - SM17659 to
access the Upright Cables. (See Figure 5-2 and Figure
5-4.)
5-4: Disconnect three cables as follows:

A) From the VSD Board. See Figure 5-3.

)--%$)!4%!#4)/.2%15)2%$
12

Figure 5-3: I/O Connectors.

Mechanical service

B) From the Encoder Assembly PC board (Not
shown).

NOTE: The Encoder is under the Treadles and
you will have to reach into the machine to
disconnect.

C) From the Hydraulic Cylinder. See Figure 5-5.

5-5: Remove the Right Lower Cover (P/N - SM17657) and
Left Lower Cover (P/N - SM17658). See Figure 5-6 and
5-7.

Figure 5-4

5-6: Remove four (4) upright weldment bolts (see Figure
5-8).
Cylinder control
cables located
here.

Figure 5-5

Figure 5-6: Lower plastic parts.

Figure 5-7

Figure 5-8

Nautilus® TreadClimber®, Model TC916 Service Manual 13

Mechanical service

6.0 - REMOVING BASE PLASTIC
Tools Needed:

• Phillips head screw driver

• 1/8 Allen bit

Figure 6-1

7! 2 . ) . '
To avoid electrical shock or damage
to the unit you must power off the
unit and make sure all power has been
drained from the unit and capacitors by
ensuring there are no lighted leds on
the console.

$!.'%2

Figure 6-2

6-1: Remove three (3) front plastic screws
(see Figure 6-1).

6-2: Remove right and left side plastic covers - four (4)
screws each side (see Figure 6-2).
6-3: Remove right and left side pan covers - two (2)
screws each side (see Figure 6-3 and Figure 6-4).

!4 4 % . 4 ) / .
Figure 6-3

)--%$)!4%!#4)/.2%15)2%$

#!54)/.

Figure 6-4:
Pan without
covers.

Mechanical service

7.0 - BELT TENSION AND ALIGNMENT
Parts Affected:

• Left Treadle Assembly - P/N 17623

• Right Treadle Assembly - P/N 17617

• Treadle Belt - P/N - SM17860

Alignment adjustment

Tools Needed:

• 5/16 Allen bit

Belt alignment and tensioning adjustments (see Figure 1).
NOTE: S ee Figure 1 for belt and tensioning adjustment
screws. The adjustments are the same on the right
and left side of the machine.
To check for proper belt alignment:

Tensioning adjustment

Figure 1

7-1: Operate TreadClimber® machine so belt is running at
2.5 - 3 mph (4 - 4.8 km/h).
7-2: Belt

is aligned when 1/8” (3.2 mm) of roller is
showing (see Figure 2).
7-3: Tightening alignment screw clockwise moves belt
out, loosening screw counter-clockwise moves belt
in.

Belts are correctly aligned when
1/8 inch of roller is showing.

To check for proper belt tension:
7.1-1: Tension is correct when the gap between the
treadles is even and centered. See Figure 3 for an
example of INCORRECT tension.
7.1-2: Tighten (clockwise turn) or loosen (counterclockwise turn) tensioning adjustment located at
the end of the treadle.
To completely loosen belt if you want to start from
scratch:

Figure 2

Tension is too tight, treadle guards are
rubbing. To correct loosen tensioning
adjustment screw.

7.2-1: T otally loosen alignment screw by turning counterclockwise.
7.2-2: L oosen tensioning screw by turning counterclockwise.

Figure 3
Nautilus® TreadClimber®, Model TC916 Service Manual 15

Mechanical service

8.0 - BELT AND DECK REPLACEMENT
Tools Needed: 7/16 & 3/4 Wrench or Socket

3/8 Allen Socket

1/8, 5/32 & 5/16 Allen Wrench

Phillips screwdriver

wood blocks 4-6 inch (10-15 cm) thick
8-1: Remove rear cover and rear step (see Figure 1 and
Figure 2).
8-2: Remove side pivot covers, side frame covers, front
cover, bottom frame covers and treadle covers (see
Figure 1).
8-3: Loosen four 1/2” - 13 bolts holding uprights to frame
using 3/4 socket or wrench.

Rear Step
Treadle Covers:
4 covers total top/bottom, and
left/right.

Rear Cover

8-4: Remove pivot casting bolts with 5/32 Allen wrench.
8-5: Lift console upright to remove pivot castings.
8-6: Relieve all tension on the belt by completely
loosening the alignment screw and then the
tensioning screw.
8-7: Remove end casting with front roller using 5/16 Allen
wrench (see Figure 3).
8-8: Remove deck screws with a 7/16 socket or wrench.
8-9: Remove deck (see Figure 4).
8-10: Brace treadles with blocks 4-6 inches (10-15 cm)
thick (see Figure 5).
8-11: There are 2 treadle bolts and 4 treadle pivot bolts
on each side. Remove these 6 bolts on one side,
and loosen the 2 treadle bolts and remove the 4
pivot bolts using a 3/8 Allen and socket wrench
(see Figure 6).
NOTE: R emove one belt at a time. Replace the bolts,
deck and belt before proceeding to the other
side.
8-12: Lift treadle to create clearance for walk belt to slide
between upright and end of roller (see Figure 7).
8-13: Replace belt and deck using the reverse order of
steps 11 through 1.
16

Side Pivot Covers
Side Frame Covers
Bottom Frame Covers
Front Cover

Figure 1

7! 2 . ) . '
Always unplug the treadclimber® before
performing any treadle repair!
Use caution when working on the deck or
replacing the belts. Serious injury to fingers
and hands may occur if the treadles are not
properly supported with blocks.

$!.'%2

Mechanical service
BELT AND DECK REPLACEMENT continued:

Figure 2: Rear cover and rear step removed.

Figure 5: Brace treadles with wooden blocks.

Figure 3: Removing end casting with Allen
wrench.

Figure 6: Remove treadle bolts & pivot bolts; 4
bolts per side.

Figure 4: Remove deck.

Figure 7: Lift treadle to create clearance.
Nautilus® TreadClimber®, Model TC916 Service Manual 17

Mechanical service
9.0 - TREADLE ADJUSTMENT
TROUBLESHOOTING
Parts Affected:

• Treadle Assembly

• Hydraulic Cylinder
Tools Needed:

• Phillips Screwdriver

• Hex Key

• Socket Wrench

• Flat Screwdriver

Figure A-1

Troubleshooting Treadle Steps:

etermining if there is a
D
problem with the hydraulic
cylinder (either air in the
system or contaminants in
the oil and valves), or in the
connecting hardware:

Figure A-2

NOTE: Two people are required to complete this step. One
person standing on the treadles, while the other
person adjusts the encoder.
9A-1: Disconnect the two leads from the hydraulic
cylinder. This will ensure that the hydraulic cylinder
Figure A-3
valve should be closed (see Figure A-1).
9A-2: With

the treadles in the locked position, pull up
and down on both the right and left treadles (see
Figure A-2).

If the right treadle is loose (moves more than ½”)
and the left treadle is solid, this points to loose
hardware. Go to Step 9A-4 in Section A.

If both right and left treadles are loose, then
the problem could be loose hardware or a bad
cylinder.

Figure A-4

Mechanical service
9A-3: C heck the cylinder by feeling the shaft of the
cylinder and pulling up and down on the left
treadle. If the cylinder shaft moves in and out of
the cylinder body by more than an 1/8th inch (3.2
mm), then the cylinder will need to be replaced.
9A-4: If the problem is not in the cylinder, then check the Figure A-5
hardware at the following locations and tighten as
necessary:

a)On the rod-end entering the cylinder, the jam
nut should be tight to the rod-end, and there
should only be 2 or 3 threads showing on the
opposite side of the jam nut. This insures that
the rod-end is fully engaged in the cylinder.
b) The connection between the rod-end and the
dependency weldment. See Figure A-6. Tighten
as necessary.

Figure A-6

c) The connection between the dependency and
the rod-end on the opposite (right) side (see
Figure A-4 and A-5).

d) The center bolt at the center of the dependency
weldment (see Figure A-6).

e) Check both the horizontal and the vertical bolts
connecting the cylinder to the coupler and the
coupler to the weldment of the pan. The bolts
should be torqued to 75 ftlbs (105 Nm). See
Figure A-7.

Figure A-7

Nautilus® TreadClimber®, Model TC916 Service Manual 19

Mechanical service

If the problem is not in
the hydraulic cylinder or
the connecting hardware,
then perform the following
electronic and software
checks:

9B-1: Turn the unit on. Move the treadles up and down
until they come to a locked position.
9B-2: If the treadles do not come to a locked position
within 2 to 4 steps, then position the treadles level.
Turn the power off. Wait 10 seconds, then turn the
power on. Move the treadles up and down until they
come to a locked position.
9B-3: If the treadles still do not come to a locked position,
then check the treadle center position on the encoder
PCB, as follows:

a) Remove the rear step. Enter diagnostic mode.
From the Intro screen, press [Speed UP] [6]
[ENTER]. The display will read “DIAGNOSTIC”.

b) Press the [Speed UP] or [Speed DOWN] keys
to scroll through the options until “TREADLE
CENTER” is displayed. Press [ENTER]. This will
release the treadles to allow them to be moved
by hand.

c) Slowly move the treadles up and down while
looking at the encoder PCB mounted in the center
of the dependency mechanism. There is a light on
the PCB. Note the position of the treadles when
the light on the PCB comes on. The treadles
should be parallel within 1 inch (2.5 cm) of each
other when the PCB light comes on (see Figure
B-1).

d) If the treadles are not parallel when the encoder
PCB light comes on, then the large encoder wheel
will need to be adjusted. Go to section C of this
section in the Service Manual to re-center the
encoder wheel. Be sure to verify that the large
encoder wheel is firmly fixed to the dependency

Figure B-1

Mechanical service
mechanism. This can be checked by verifying
the number of encoder counts in the diagnostic
software. See section D of this bulletin to check
the encoder counts.

e) If the treadles are parallel or within 1 inch of
parallel when the encoder PCB light comes one,
reset the treadle center in the software mode.
Go to Section E of this bulletin to reset the
treadle center in the software mode.

To re-center the large
encoder wheel attached to the
dependency mechanism, follow
these steps:

9C-1: Loosen the set screw. Be sure that the treadles are
level.
9C-2: Slowly rotate the large encoder wheel in
one direction by hand or use a small flat-blade
screwdriver on the teeth of the encoder wheel.
Rotate the wheel until the light comes on the
encoder PCB.

Figure C-1

9C-3: With the treadles level and the encoder light on,
tighten the set screw holding the large encoder
wheel in place (see Figure C-1).
9C-4: Go to section D to make sure that the large encoder
wheel is not slipping during treadle movement.

Nautilus® TreadClimber®, Model TC916 Service Manual 21

Mechanical service

To check the encoder range
of movement and to make
sure the large encoder
wheel is not slipping during
movement, follow these
steps:

9D-1: F rom the Intro screen, press [Speed UP] [6] [ENTER]. The display will read “DIAGNOSTIC”. Press
the [Speed UP] or [Speed DOWN] keys to scroll
through the options until “TREADCLIMBER” is
displayed. Press [ENTER].

Figure D-1

9D-2: T he top line of the display will read: “ENCODER
- XX” (see Figure D-1). Press the [9] key. The PWM
value, which is on the lower line center position,
will change from 255 to 189, and the treadles will
be free to move up and down.
9D-3: S hift your weight to the left side, allowing the left
treadle to fall all the way to the bottom. With the
left treadle held at the bottom, note the number
displayed on the top line, far right. It should read
in the range between [ - 30 ] and [ - 50 ]. Remember the number.
9D-4: N
ext, shift your weight to the right side, allowing
the right treadle to fall all the way to the bottom.
The number displayed on the top line, far right
should read in the range between [ 30 ] and [ 50].
Remember the number.
9D-5: C alculate the total range between the two numbers. The absolute value of the negative number
(left side down) added to the positive number (right
side down), represents the total encoder range
of motion. This number should be in the range
between 70 and 90 total counts.
9D-6: If the range is less than 70, check to make sure the
large encoder wheel is not slipping.
To check if the encoder wheel is slipping, slowly move the treadles up and down. The encoder value
displayed will hesitate and not count up or down. In other words, the encoder value will not change, even though
there is movement in the treadles. If the encoder value does not change during movement of the treadles, then
the encoder wheel is slipping and needs to be tightened or replaced.

Mechanical service

To reset the treadle center
in software to match the
treadle center on the
encoder, follow these steps:

9E-1: From the Intro screen, press [Speed UP] [6]
[ENTER]. The display will read “DIAGNOSTIC”.
Press the [Speed UP] or [Speed DOWN] keys
to scroll through the options until “TREADLE
CENTER” is displayed. Press [ENTER].

Figure E-1

9E-2: The top line of the display will read: “VIRTUAL
CENTER - XX” (see Figure E-1). With the treadles
held parallel, press the [STOP] key. The number
on the display will be used by the software for the
center point position. When STOP key is pressed
the number will change to a value between 0
to 255. This means the treadle center in the
software has been recalibrated to match the
center position of the encoder.
9E-3: Press [CLEAR] twice to exit the Diagnostic mode.
Move the treadles up and down until the treadles
lock. Verify that the treadles lock parallel to each
other or within 1” of parallel.
9E-4: If the treadles do not lock parallel or close to
parallel, then 1) recheck the center position on the
encoder PCB (section B); 2) recheck the encoder
range (section D); 3) recheck the treadle center in
software (section E).

Nautilus® TreadClimber®, Model TC916 Service Manual 23

Mechanical service

10.0 - REPLACEMENT OF PIVOT COVERS
Parts Affected:
• Right Pivot Cover - P/N 17660
• Left Pivot Cover - P/N 17661
Tools Needed:
• 3/16 Allen Wrench
• 5/32 Allen
• 1/8 Allen
• Phillips Screwdriver

• 3/4 inch Socket
• 3/4 inch Wrench or Open Ended Wrench
• Wedge support or flat head screwdriver to use as
a wedge
See Figure 1 for Steps 10-1 thru 10-4.

10-1: Remove Rear Step (P/N -17733) and Step Plate (P/N - 17591).
10-2: Remove Rear Plastic Cover (P/N - 17659).
10-3: Remove right Treadle Cover (P/N - SM17731 and P/N - SM17666), then remove the left Treadle Cover (P/N - SM17332
and P/N - 17667).
10-4: Remove right and left Upright Lower Plastic Pivot Covers (P/N - SM17657 and P/N - 17578).
Figure 1

Treadle Top Cover

Lower Plastic Cover

Upright Attachment
Bolts

Treadle Top Cover
Rear Step
Rear Plastic Cover
Lower Plastic Cover

Mechanical service

)--%$)!4%!#4)/.2%15)2%$

$!.'%2
#!54)/.

10-5: Loosen 4 inside bolts (2 on each side) that attach the
upright (P/N - 17626) to base frame (see Figure 2).

Figure 2

Slide Uprights Back

DO NOT REMOVE BOLTS COMPLETELY. TO DO
SO WILL CAUSE THE UPRIGHT SUPPORTS TO
FALL RESULTING IN DAMAGE TO THE UNIT AND
POSSIBLE INJURY TO BYSTANDERS. THE BOLTS
MUST NOT BE BACKED BEYOND A MAXIMUM
DISTANCE OF 1/2 INCH. SEE FIGURE 2.

!4 4 % . 4 ) / .

toMAXIMUM
3/4” MAX (1.3 cm)
1/21/2”
INCH

10-6: Slide the upright (P/N - 17626) backwards, away
from the front of the unit to expose the right and left
pivot covers. Secure in the back position (see Figures
1 &2).

)--%$)!4%!#4)/.2%15)2%$

#!54)/.
SLIDING THE UPRIGHTS MAY REQUIRE
ASSISTANCE. DO NOT ATTEMPT TO LIFT THE
UNIT.

Figure 3

10-7: Remove right and left pivot covers (P/N - 17660 &
17661). This may require a twisting motion (see
Figure 3). Install replacement pivot cover in its place.
10-8: Reassemble the unit in reverse order from Step 6
to Step 1: Slide the uprights forward into place;
tighten the four inside bolts; reinstall the right and
left lower plastic covers; reinstall the right and left
treadle top covers; reinstall rear plastic cover; and
reinstall rear step and step plate weldment.

Left Pivot Cover

Nautilus® TreadClimber®, Model TC916 Service Manual 25

Mechanical service
11.0 - REPLACEMENT OF HYDRAULIC
CYLINDERS
Parts Affected:
• Front Cover - P/N 17652
• Left Side Cover - P/N 17656
• Left Lower Pan Cover - P/N 17654
• Left Lower Treadle Cover - P/N 17665
• Left Top Treadle Cover - P/N 17667
• Bolt - P/N 17677
• Cylinder Pivot Weldment - P/N 17586
• Hydraulic Cylinder - P/N SM17810

Figure 1

Tools Needed:

• Phillips screw driver (long & short shaft)
• Loctite 242 (blue)
• 3/8 Allen wrench
• 3/4 inch Socket
• 3/4 inch Open End Wrench
• #15 Torque wrench
To Remove the Hydraulic Cylinder:
Before performing the following steps make sure

fRONT cOVER

left
side
cover
left
side
pivot
cover

that you note the location and position of all
hardware that is removed.

11-1: Stand on the right treadle to raise the left treadle to
full height.
11-2: Turn the power off and unplug the machine from the
wall outlet.
See Figure 1 for Steps 3 to 5.
11-3: Remove the Front Cover (P/N - 17652).
11-4: Remove the Left Side Cover (P/N - 17656) and Left
Side Pivot Cover.
11-5: Remove the Left Lower Pan Cover (P/N - 17654).
11-6: Unplug two lead wires from cylinder.
11-7: Remove Left Lower Treadle Cover (P/N - 17665).
11-8 Tilt the machine upward slightly and brace with a
block of wood under the machine to hold in place.

left lower pan cover

Mechanical service
11-9: With a 3/8 inch Allen wrench and 3/4 inch wrench placed
on the Nut (P/N - SM22893) under the frame, loosen Bolt
(P/N - SM17677) from the Cylinder Mount Weldment (P/N
- SM17586) and bracket attachment welded to the base
frame.

Figure 2: Removing the bolt connecting the Hydraulic Cylinder to
the Dependency Linkage.

11-10: Remove the bolt holding the cylinder to the dependency
link using a 3/4 inch open-end wrench and 3/4 inch
socket (see Figure 2).
11-11: Use a 3/4 inch socket and 3/4 inch open-end wrench
to loosen Bolt (P/N - SM26669) from the cylinder mount
weldment (see Figure 10-3).
11-12: Remove the two Bolts previously loosened in Step 11-9
and 11-10.

Figure 3: Removing bolt connecting Cylinder Mount Weldment from

11-13: Remove the hydraulic cylinder. Mark the hydraulic
cylinder to show the reason for removing.

the Hydraulic Cylinder.

To Install the New Hydraulic Cylinder:
11-14: Attach bolt, washers, and nut into the Cylinder Mount
Weldment (P/N - SM17867) and new Hydraulic Cylinder
(P/N - SM17810), then tighten using a 3/4 inch socket
and 3/4 inch Open-end wrench (see Figure 4 - Bolt B).
11-15: Slide new hydraulic cylinder with attached cylinder
mount into the bracket attachment welded to the base
frame and loosely tighten with Bolt (P/N - SM17677),
washer, and Nut (P/N - SM22893). See Figure 4 - Bolt
C.

Figure 4: Hydraulic Cylinder bolt locations:

11-16: Attach and tighten the hydraulic cylinder to the
dependency link using a 3/4 inch Open-end wrench and
3/4 inch socket with Bolt (P/N - SM25412), washers,
and nut (see Figure 4 - Bolt A).
11-17: Return to bolts in Steps 11-1, 11-2 and 11-3 of Install
the New Hydraulic Cylinder process. Tighten bolts in
order of A, C, B (see Figure 4) to 75 Ft Lbs (100 Nm) with
a Torque wrench.
11-18: Reconnect the plugs that were disconnected in Step 116 of the Removal Process to the hydraulic cylinder.

NOTE: Allbolts are at 75 ft lbs and should be tightened
in A, C, B order always.

11-19: Replace the machine covers in reverse order of the
Removal Process from Steps 11-7 to 11-3.
Nautilus® TreadClimber®, Model TC916 Service Manual 27

Mechanical service

12.0 - VIBRATION TROUBLESHOOTING
Parts Affected:
• Rear Step - P/N SM17733
• Step Plate Weldment - P/N SM17591
• Flywheel - P/N SM41059
• Snap Ring - P/N SM17692
• Rear Roller Assembly - P/N SM17501

Figure 1: Flywheel set screws

Tools Needed:
• Phillips screwdriver
• 5/32 Allen bit
To Correct Vibration in treadles:
12-1: Remove the rear step and step plate weldment
exposing the rear roller.
Check Flywheel and Motor Mounting:
12-2: Check set screws in flywheel and motor mounting
hardware for tightness (see Figure 1).
12-3: Turn machine on and adjust speed to 1 MPH
(1.6 km/h).
12-4: Visually inspect the flywheel, if any wobble is
noticeable inspect the drive belt on the poly-v
pulley and the flywheel for correct alignment. If
misalignment is visible move the flywheel and
poly-v pulley on the motor into correct alignment
position.

NOTE: If the flywheel is replaced and the problem
persists the motor may be at fault.

12-5: Try tightening the mounting hardware on the motor
a little more before replacing the motor.

Figure 2: Front Roller Snap Ring Location

Mechanical service
Check the Front Roller Snap Ring:
12-6: Verify that the snap ring on the front rollers is in place
properly (see Figure 2).

NOTE: This can be seen more easily with the treadle
guards removed.

Check the Rear Roller Pulley:
12-7: Check the rear roller pulley, if the pulley wobbles it
was pressed on incorrectly and the entire roller needs
to be replaced.
12-8: Check the center of the rear roller (where the two
halves join) if there is any wobble the roller was not
assembled correctly and needs to be replaced.

Nautilus® TreadClimber®, Model TC916 Service Manual 29

CARDIO CONSOLE CODES
General Information:
• Press the UP Speed/Load key [], the numeric [ # ] key, and then press the [ENTER] key once to enter this mode.
Pressing [] or [] forwards or backs up through the selections. Pressing [ENTER] then selects that item. Enter
values then press the [ENTER] key again to store the value.
• Once in console codes mode, pressing [] [] forwards or backs up through the selection, pressing [ENTER] then
selects that item. Pressing [CLEAR] exits any of the special access modes.
• Pressing [CLEAR] twice will exit the Console Service Mode.
Workout Default Console Codes:
[] [ 2 ] [ ENTER ]
[] [ ENTER ]
[] [ ENTER ]
[] [ ENTER ]
[] [ ENTER ]
[] [ ENTER ]
[] [ ENTER ]
[] [ ENTER ]

“DEFAULTS”
“ENTER WT XXX”
“ENTER LEVEL 1 TO 20”
“ENTER TIME 5 TO 99”
“ENTER AGE 10 TO 99”
“CHR PERCENT XX”
“ENTER SPEED XX.X”
“QUICK SPEED XX.X”

[] [ 3 ] [ ENTER ]
[] [ ENTER ]
[] [ ENTER ]
[] [ ENTER ]
[] [ ENTER ]
[] [ ENTER ]
[] [ ENTER ]
[] [ ENTER ]
[] [ ENTER ]
[] [ ENTER ]
[] [ ENTER ]
[] [ ENTER ]
[] [ ENTER ]

“CUSTOMIZE”
“MAX TIME”
“COOL DOWN”
“CHANGE UNITS”
“HR INPUTS”
“SELECT STATS”
“LANGUAGE”
“UPPER CONTRAST ADJ”
“LOWER CONTRAST ADJ”
“MAX SPEED”
“ENABLE MAG KEY”
“AUTO STOP”
“SET DEFAULTS“

[] [ 4 ] [ ENTER ]
[] [ ENTER]
[] [ ENTER ]
[] [ ENTER ]
[] [ ENTER ]
[] [ ENTER ]
[] [ ENTER ]
[] [ ENTER ]

“MACHINE STATUS”
“ RUN HOURS”
“ WORKOUTS”
“ DISTANCE”
“ CONSOLE VERSION” “Displays Console Version #”
“DEVICE TYPE”
”Displays Machine Type”
“ TM DRIVE VER”
“ MAINT HOURS”

NOTE: Severalcodes may be included in the
console codes list that do not apply
to the treadclimber® functions.

CARDIO CONSOLE CODES

Workout Default Console Codes Continued…
[] [ 5 ] [ ENTER ] “ R AND D”
[] [ENTER]
“ PROGRAM LOOP”
[] [ENTER]
“ COM TIMEOUT”

[] [ 6 ] [ ENTER ] “ DIAGNOSTIC ”
[] [ ENTER ]
“DISPLAY TEST”
[] [ ENTER ]
“KEY TEST”
[] [ ENTER ]
“SERIAL PORTS”
[] [ ENTER ]
“A SENSOR B”
[] [ ENTER ]
“I/O TEST”
[] [ ENTER ]
“BUS VOLTS”
[] [ ENTER ]
“TREADLE CENTER”
[] [ ENTER ]
“TREADCLIMBER”
[] [ 7 ] [ ENTER ] “ MAINTENANCE LOGS ”
[] [ ENTER ]
“ERROR LOG”
[] [ ENTER ]
“MAINT HOURS”
[] [ ENTER ]
“QA ID”

[] [ 8 ] [ ENTER ] “ Change Machine” [ ENTER ]
For Treadmill Devices, the selections are:
[] [ ENTER ] “TREADCLIMBER”
[] [ ENTER ] “T916”
[] [ ENTER ] “T914”
[] [ ENTER ] “TC/TM CONFIG RQD”

Nautilus® TreadClimber®, Model TC916 Service Manual 31

CARDIO CONSOLE CODES

PARTS LIST
Ordering Replacement Parts:
In the US, call 800-628-8458. Outside the US, call +44-26-460-77-77. Authorized Nautilus representitives will assist you
with your specific service requirements. Items in the parts list highlighted in gray are replaceable. Items with no warranty
code or part number are replaceable as part of a higher-level assembly only.
Warranty Notes (For units in the USA only):
1 - Part covered under standard 3 year parts warranty for replacement.
2 - Part covered under standard 1 year wear item warranty for replacement.
3 - Part covered under standard 15 year frame and AC-motor warranty.
International warranty coverage may vary. Contact an International office listed in the Important Contact Number section of
this manual for information.
Ref #:

Assembly #:

Part #:

SM17501

Description:

Warranty:

ASSEMBLY, REAR ROLLER

3 YEAR

SM17568

Weldment, Base Frame

15 year

SM17570

Spacer, Treadle Heim Joint

3 year

141

SM17591

Weldment, Rear Step

15 year

SM17615

Washer, Shoulder Isolation

3 year

SM17617

assembly, treadle - right side

sm17508

Assembly, Front Roller

3 year

sm17522

Weldment, Right Treadle

15 year

sm17526

Weldment, Belt Tensioner

15 year

sm17528

Spacer, Rear Bearing

3 year

sm17543

Weldment, Cylinder Mount

15 year

106

sm17578

Washer, Lock, Int. Star #10, SS

3 year

255

sm17579

Screw, FH, 10-32 x .75, Hex Dr. SS

3 year

sm17608

Weldment, Treadle Guard, Right

15 year

sm17609

Casting, Treadle Front Roller Mount

3 year

sm17618

Cover, Front Slide

3 year

sm17620

Plate, Deck Support

3 year

sm17660

Casting, Cover, Right Treadle Pivot

3 year

sm17664

Cover, Bottom Treadle Right

1 year

sm17666

Cover, Top Treadle Right

1 year

sm17673

Block, Treadle End Cap

3 year

242

sm17675

Screw, 1/4-20, x .75, Socket Head Cap

3 year

sm17676

Screw, 3/8-24 x 2.00, Socket Head Cap

3 year

sm17677

Screw, .500-13 x 4.00, Socket Head Cap

3 year

sm17678

Screw, 3/8-24 x 1.50, Socket Head Cap

3 year

sm17680

Screw, 3/8-16 1.25, Socket Head Cap

3 year

174

sm17685

Key, 0.190 x 0.190x 1.380

3 year

sm17691

Bearing, Ball 30MM x 55MM

3 year

sm17692

Snap Ring, External, 25MM Dia.

3 year

SM17865

Belt Guide, Aluminum

sm17731

Treadle Step, Right, Insert Molded

1 year

Nautilus® TreadClimber®, Model TC916 Service Manual 33

PARTS LIST
Ref #:

Part #:

Description:

Warranty:

SM17808

Screw, 10-32 x .375, SHCS, SS

3 year

SM17809

Screw, 10-32 x .625, SHCS SS

3 year

173

SM17815

Screw, Button HD Cap, 10-32 x 5 /8L

3 year

sm17860

Belt, Treadclimber

1 year

sm17862

Deck, Treadle

1 year

228

sm22047

Washer, Flat 1/4 ID x 5/8 OD

3 year

sm22098

Screw, .250-20 x 1.50, Hex Head Cap

3 year

sm22276

Screw, #6 S.T. x .625 Hex OR TO

3 year

254

sm25777

Screw, .250-20 x 1.00 Button Head

3 year

sm27585

Washer, .406 x .812 x .065 Flat

3 year

assembly, treadle left

3 YEAR

Assembly #:

sm17623

sm17508

Assembly, Front Roller

3 year

sm17523

Weldment, Left Treadle

15 year

sm17526

Weldment, Belt Tensioner

15 year

sm17528

Spacer, Rear Bearing

3 year

sm17543

Weldment, Cylinder Mount

15 year

106

sm17578

Washer, Lock, Int. Star #10, SS

3 year

255

sm17579

Screw, FH, 10-32 x .75, Hex Dr. SS

3 year

sm17609

Casting, Treadle Front Roller Mount

3 year

sm17618

Cover, Front Slide

3 year

sm17620

Plate, Deck Support

3 year

sm17625

Weldment, Left Treadle Guard

15 year

sm17661

Casting, Cover, Left Treadle Pivot

3 year

sm17665

Cover, Bottom Treadle Left

1 year

sm17667

Cover, Top Treadle Left

1 year

sm17673

Block, Treadle End Cap

3 year

242

sm17675

Screw, 1/4-20, x .75, Socket Head Cap

3 year

sm17676

Screw, 3/8-24 x 2.00, Socket Head Cap

3 year

sm17677

Screw, .500-13 x 4.00, Socket Head Cap

3 year

sm17678

Screw, 3/8-24 x 1.50, Socket Head Cap

3 year

sm17680

Screw, 3/8-16 1.25, Socket Head Cap

3 year

sm17685

Guide, Belt

3 year

sm17691

Bearing, Ball 30MM x 55MM

3 year

sm17692

Snap Ring, External, 25MM Dia.

3 year

101

sm17732

Treadle Step, Left, Insert Molded

1 year

SM17808

Screw, 10-32 x .375, SHCS, SS

3 year

SM17809

Screw, 10-32 x .625, SHCS SS

3 year

173

SM17815

Screw, Button HD Cap, 10-32 x 5 /8L

3 year

sm17860

Belt, Treadclimber

1 year

sm17862

Deck, Treadle

1 year

228

sm22047

Washer, Flat 1/4 ID x 5/8 OD

3 year

sm22098

Screw, .250-20 x 1.50, Hex Head Cap

3 year

PARTS LIST
Ref #:

Assembly #:

Part #:

Description:

Warranty:

sm22276

Screw, #6 S.T. x .625 Hex OR TO

3 year

254

sm25777

Screw, .250-20 x 1.00 Button Head

3 year

sm27585

Washer, .406 x .812 x .065 Flat

3 year

sm17626

assembly, upright

110

sm17702

Housing, Ergo, CHR, Top Left

1 year

111

sm17703

Housing, Ergo, Bottom Left

1 year

112

sm17704

Housing, Ergo, CHR, Top Right

1 year

113

sm17705

Housing, Ergo, Bottom Right

1 year

114

sm17739

Keypanel, Ergo, TC916

1 year

256

sm40639

Screw, 6-32 x .438 Lg Shc

3 year

121

sm41034

Contact Plate, CHR

1 year

122

sm41112

Housing, Ergo, Bottom Center

1 year

123

sm41158

End Cap, Handle Barm Molded

1 year

sm41169

Cable Harness

3 year

sm41180

Heart Rate Detection Module

3 year

sm41193

Cable Harness

3 year

SM41268

Screw, 6-32 x .3125, SHCS

3 year

sm41443

Cable Harness

3 year

102

sm17793

Assy, Weldment, Upper Right

252

sm17794

Assy, Weldment, Lower Right

n/a

sm17824

Assy, Harness Extension, Console

n/a

sm17826

Assy, Harness, Extension, VSD

n/a

sm17775-007

Intrnl/Extrnl Washer .375

n/a

sm25796

Screw, .375-16 x 1.00, BH, SS

sm41449

Assy, Ergo Bar, Touch Sensor

1 year

SM17631

Belt, Drive, Poly-V

3 year

257

27
SM17640

Assembly, Treadle Dependency

129

sm17551

Weldment, Treadle Rocker

15 year

135

sm41048

Bearing, Ball, 25MM x 52MM

3 year

130

sm17639

Shaft, Rocker Pivot

3 year

sm17692

Snap Ring, External, 25MM Dia

3 year

128

sm17548

Gear, 120T (48DP), Cut

3 year

251

sm17742

Bracket, Gear Locking

3 year

250

sm24088

Washer, #10 Split Lock

3 year

136

SM17641

Assembly, Dependency Link

146

sm17651

Bumper, Rubber Stop

3 year

147

sm17652

Cover, Front Trim

1 year

148

sm17653

Cover, Right Pan

1 year

149

sm17654

Cover, Left Pan

1 year

150

sm17655

Cover, Right Side

1 year

151

sm17656

Cover, Left Side

1 year

152

sm17657

Cover, Right Pivot

1 year
Nautilus® TreadClimber®, Model TC916 Service Manual 35

PARTS LIST

Ref #:

Assembly #:

Part #:

Warranty:

153

sm17658

Cover, Left Pivot

1 year

154

sm17659

Cover, Lower Front Step

1 year

107

sm17668

Cover, Top Upright Right

1 year

108

sm17669

Cover, Top Upright Left

1 year

Assembly, Console TC916

3 year

155

SM17670

SM17676

Screw, 3/8-24 x 2.00, SHC

3 year

177

SM17682

Screw, 3/8-16 x 1.00 Button Head Cap

3 year

172

SM17683

Screw, .500-13 x 3.25, Hex Head Cap

3 year

175

sm17686

Leveler, 0.500 inches-13 x 0.875 Tall

3 year

ASSMEBLY, VSD, TC9.16

3 YEAR

178

sm17688

260 - INT SM41404

Assembly, Choke, 6MH, International Units

253

SM17689

Decal, Step Warning

1 year

258

sm17695

Screw, #10-32 x 0.375, Flat Head, Phil

3 year

ASSEMBLY, CONFIG PLATE, TC9 SERIES (USA Domestic Units)

3 YEAR

188

sm17719

188 - INT SM17823

Assembly, Config Plate, 230V, International Units TC9

sm28214

Screw, 10-32 x .750 Socket HDCP

125

sm17569

Assy., Treadle Mount

143

SM17733

Rear Step, Insert Molded

1 year

sm17809

Screw, 10-32 x .625, SHCS, SS

3 year

126

SM17810

ASSMEBLY, CYLINDER, HYD. CONTROL, TC916

173

sm17815

Screw, Button Hd Cap, 10-32 x 5/8L

3 year

233

sm22030

Washer, 3/8 USS Flat

3 year

228

sm22047

Washer, Flat 1/4 ID x 5/8 OD

3 year

132

sm22091

Washer, .50 SAE Flat

3 year

133

SM22222

Washer, Split Lock, .50

3 year

138

sm22893

Nut, Jam, .500-13 UNC, Grade 8

3 year

230

sm24643

Nut, .375-16, HX Jam, Nylon Insert

3 year

237

sm27487

Drive Motor, AC Variable

15 year

238

sm27562

Washer, Neoprene, .490x1.063x.09

3 year

239

sm27577

Screw, M6 x 1.00 x 16 HHCAP

3 year

240

sm27578

Washer, M6, Splitlock, Zinc

3 year

241

sm27579

Washer, M6, Flat, Zinc

3 year

226

sm27586

Spacer, Nylon, .125x .500 x 1.120

3 year

Assembly, Rotary Encoder

3 year
3 year

sm40837

Description:

sm41059

Flywheel, Cast, NTR 6000/7000

sm17545

Assembly, Position Sensor TC

134

sm25412

Screw, .500-13 x 1.75 Hex HD CA

212

sm17737

Decal, Siderail, Right

210

sm17740

Decal, Rear Pivot

209

sm17736

Decal, Rear Hood

211

sm17738

Decal, Siderail, Left

EXPLODED VIEWS
Working with exploded views
The reference numbers in the drawings on the following pages correlate to the reference numbers in the parts list on the
preceding pages.
Base Frame with Drive Motor:

230
8

174

233
226
238
237

177

238
26

125

146

Base Frame with VSD Motor Control Board:

260

Nautilus® TreadClimber®, Model TC916 Service Manual 37

EXPLODED VIEWS
Base Frame with Dependency Link and Hydraulic System:

Dependency Link:

EXPLODED VIEWS
Treadle Assembly:

Console Upright Assembly, Rear Step and Console Assembly:

Nautilus® TreadClimber®, Model TC916 Service Manual 39

EXPLODED VIEWS
Base Frame Covers: (Right side as you stand on unit facing console.)

Base Frame Covers: (Left side as you stand on unit facing console.)

EXPLODED VIEWS
Treadle Deck and Belt Assembly: (Right side as you stand on unit facing console.)

Treadle Deck and Belt Assembly: (Left side as you stand on unit facing console.)

Nautilus® TreadClimber®, Model TC916 Service Manual 41

EXPLODED VIEWS
Treadle Arm Assembly: (Right side as you stand on unit facing console.)

Treadle Arm Assembly: (Left side as you stand on unit facing console.)

EXPLODED VIEWS
Treadle Covers - Top and Bottom: (Right side as you stand on unit facing console.)

Treadle Covers - Top and Bottom: (Left side as you stand on unit facing console.)

Nautilus® TreadClimber®, Model TC916 Service Manual 43

EXPLODED VIEWS
ROC Bar Assembly:

Console Upright and Cover Assembly:

EXPLODED VIEWS
Rear Step and Support Platform:

Nautilus® TreadClimber®, Model TC916 Service Manual 45

What this means

First Action

Second Action

Third Action

Fourth Action

P51 Processor PCBA Nonoperational.

Processor is non-operational.
No power or P51 Processor
PCBA has failed.

P51 Processor PCBA Nonoperational.

DS1 Flashing @
Irregular Rate

DS1 Off

DS1 On Continuous

Power off/on treadmill, see if problem selfclears.

Power off/on treadmill, see if problem selfclears. Check for unplugged or damaged
cables. Communication cable from J10 on
P51 Processor PCBA is cable most likely to
cause problem.

Normal condition, no action required.

Walkbelt motor is OFF.

Walkbelt motor is ON.

Normal condition.

Processor in reset is
attempting to re-establish
communication.

Processor in reset or no
communication.

DS1 Off

DS1 On Continuous

DS2 Flashing @ 1
Second Rate

DS2 Flashing @
Irregular Rate

DS2 Off

Power off/on treadmill, see if problem selfclears. Check for unplugged or damaged
cables. Communication cable from J10 on
P51 Processor PCBA is cable most likely to
cause problem.

Normal condition, no action required.

DS1 Flashing @ Any VSD PCBA is Non-operational. Power off/on treadmill, see if problem selfRate
clears. Check for unplugged or damaged
cables. Communication cable from J10 on
P51 Processor PCBA is cable most likely to
cause problem.

VSD PCBA:

Normal Condition.

DS1 Flashing @ 1
Second Rate

P51 Processor PCBA:

Replace VSD
PCBA.

Replace P51
Processor PCBA.

Replace
Configuration
Plate.

Check LEDs on VSD Replace P51
to see if VSD has
Processor PCBA.
power.

Replace P51
Processor PCBA.

Replace Configuration
Plate.

Note about use of Status LEDs: A single LED does not show the complete picture of an error condition. Review the status of all LEDs prior to deciding which assemblies
to replace.

1. LED
Operation on
PCBAs

ELECTRONIC TROUBLESHOOTING Summary

Stored data such as user
preferences, total time, and
mileage has been corrupted.

EEPROM Error

Power off/on treadmill, see if problem selfclears. Defaults and configuration data will
need to be entered again.

Internally generated processor Power off/on treadmill, see if problem selferror.
clears.

First Action

High Voltage Drive Bus is discharged and
VSD PCBA is safe to handle.

Normal powered up condition. Do not handle
VSD PCBA until LEDs go out after about 2
minutes.

High Voltage Drive Bus is discharged and
VSD PCBA is safe to handle.

Normal powered up condition. Do not handle
VSD PCBA until LEDs go out after about 2
minutes.

Check for unplugged or damaged cables.
Cable going to P20 on VSD PCBA is most
likely to cause problem.

Normal condition, no action required.

Check for unplugged or damaged cables.
Cable going to P14 on VSD PCBA is most
likely to cause problem.

Normal condition, no action required.

This error is usually caused by excessive
drag or friction on the deck. Closely inspect
the deck and look for signs of excessive
wear. If needed replace the belt and deck.

First Action

ALU Error
Program Error
Static RAM Error
Timer Error

What this means

High Voltage Drive Bus
Capacitors have Discharged.

DS6 Off

2. Self-Test
Error Codes

Danger! High Voltage Drive
Bus Voltage Present.

DS6 On Very Bright

15V Predrive Power Supply is
Non-operational.

DS4 Off

High Voltage Drive Bus
Capacitors have Discharged.

15V Predrive Power Supply is
Operational.

DS4 On Continuous

DS5 Off

5V VCC Power Supply is Nonoperational.

DS3 Off

Danger! High Voltage Drive
Bus Voltage Present.

5V VCC Power Supply is
Operational.

DS3 On Continuous

DS5 On Very Bright

Walkbelt Over current
Condition.

What this means

DS2 On Continuous

1. LED
Operation on
PCBAs

Replace P51
Processor PCBA.

Second Action

Use an ohmmeter
to verify Config
PCBA fuses F3 and
F4.

Power off/on
treadmill, see
if problem selfclears. Check
for unplugged or
damaged cables.

Second Action

Third Action

Replace VSD
PCBA.

Third Action

Fourth Action

Replace Configuration
Plate.

Replace Drive Motor.

Fourth Action

ELECTRONIC TROUBLESHOOTING Summary

Nautilus® TreadClimber®, Model TC916 Service Manual 47

The processor on the VSD
PCBA cannot communicate
with the motor control IC on
the VSD PCBA.

Unit must be reconfigured as a Press [CLEAR].
TreadClimber.
Go to Change Machine Mode (Speed
Increase, 8, Enter, Enter), then scroll to
“TreadClimber” using the Speed Increase and
Speed Decrease keys.

DRV RESET

GRD LIMIT ERROR

Early versions of
software displayed
this error as “ABS
ERROR” or “POWER
LOSS ERROR”
1 - The DC bus that powers the
walkbelt is too low or high.
2 - The thermal switch on the
walkbelt motor is open due to
the motor overheating.
3 - The circuitry that measures
the walkbelt motor current has
failed.

Third Action

Let walkbelt motor
cool down and
cycle power. Motor
thermal switch may
open due to worn
belt and deck.

Ensure all
cables from the
configuration plate
to the VSD PCBA
are connected.
Cable going to
P20 on VSD PCBA
is most likely to
cause problem.

Ensure all
Replace VSD
cables from the
PCBA.
configuration plate
to the VSD PCBA
are connected.
Cable going to P20
on VSD PCBA is
most likely to cause
problem.

Second Action

Ensure all cables from the configuration plate Replace VSD
to the VSD PCBA are connected. Cable going PCBA.
to P20 on VSD PCBA is most likely to cause
problem.

Verify input line voltage is within
specifications. Error indicates voltage is too
low or high.

Can occur during program
operation. Treadmill goes to
idle and stops quickly. This
Error can denote any of the
following:

DRIVE PWR ERROR

Verify input line voltage is within
specifications. Error indicates voltage is too
low or high.

First Action

Occurs when the VSD PCBA
detects too low or too high of
a voltage on the DC drive bus.

What this means

Drive Error

1. LED
Operation on
PCBAs
3. Operational
Error Codes

Replace VSD PCBA.
If problem persists
replace Configuration
Plate.

Replace Configuration
Plate.

Fourth Action

ELECTRONIC TROUBLESHOOTING Summary

Message appears when Pin
10 of the communication cable
between the P51 Processor
and VSD PCBAs are open.

Replace Communication cable which connects J10 on P51 Processor PCBA on VSD
PCBA.

Walkbelt motor current is too
low.

Walkbelt motor current is too
high or walkbelt motor thermal
switch has opened due to a
motor overload.

OUT CUR ERROR

SYS OVRLD ERROR

This error is usually caused by excessive
drag or friction on the deck. Closely inspect
the deck and look for signs of excessive wear.
If needed replace the belt and deck.

Ensure motor is connected to VSD PCBA.
Cycle power and see if problem self-clears.

NTM CONFIG RQRD This error indicates that the
Replace P51 Processor with one manufacP51 Processor PCBA was
tured for use in Treadmills or TreadClimbers.
manufactured for a non-Treadmill product such as an elliptical, stepper or bike.

NOT DEFINED, then
DRIVE POWER
ERROR

If possible, press [CLEAR], then go to Diagnostic Mode (Speed Increase, 6, ENTER), then
scroll to “Key Test” using the Speed Increase
and Speed Decrease keys. Press each key to
identify which key is stuck.

Message appears during the
Service Test KEY TEST, if two
keys are held down simultaneously or if a key is pressed
while another key is stuck
closed.

MULTIPLE KEY

First Action

What this means

GRD MOVE ERROR

1. LED
3.
Operational
Operation
on
Error
Codes
PCBAs
Fourth Action

Replace Drive
Motor.

Replace P51
Processor PCBA.

Replace Drive Motor.

Disconnect ROC
Replace P51
key panel cable,
Processor PCBA.
determine whether
problem persists.
If problem goes
away with ROC
(Ergo) key panel
disconnected,
check Ergo cable.
Plug alternate
Touchsensor key
panel and check
operation. Replace
either ROC cable
or key panel as
required.

Third Action

Let walkbelt motor Replace VSD
cool down and
PCBA.
cycle power. Motor
thermal switch may
open due to worn
belt and deck.

Replace VSD
PCBA.

If problem persists,
open rear console
access panel.
Disconnect main
keyboard cable
from Processor
board, and connect
an alternate
known-good key
panel. Determine
whether keys are
now operable.
If the alternate
key panel works,
replace the key
panel.

Second Action

ELECTRONIC TROUBLESHOOTING Summary

Nautilus® TreadClimber®, Model TC916 Service Manual 49

Unit must be reconfigured
as either a Treadmill or
TreadClimber or VSD PCBA
has wrong jumper configuration.

Treadmill or TreadClimber
communications error. Means
P51 Processor PCBA can’t talk
serially to VSD PCBA.

TM COM ERROR

What this means

TC/TM CONFIG
RQRD

1. LED
3.
Operation
Operational
on
Error
PCBAs
Codes

Cycle power and see if problem self-clears.

Press [CLEAR].
Go to Change Machine Mode (Speed Increase, 8, Enter, Enter), then scroll to appropriate configuration using the Speed Increase
and Speed Decrease keys, then press ENTER.

First Action

Replace
communication
cable between P51
Processor PCBA
and VSD PCBA.

Ensure jumpers on
VSD are correct.
TreadClimbers
should have all
three jumpers in
place on PC0, PC3
and PC5.

Second Action

Replace VSD
PCBA.

Third Action

Replace P51
Processor PCBA.

Fourth Action

ELECTRONIC TROUBLESHOOTING Summary

Wiring Schematic

GREY

#40865
PCBA, C52 LCD DISPLAY

U11

U10

17754

DS1 DS2

DS4

2
1

10
9

DS3

4 3 1

P17

#41442

REMOTE
CHR/WHR
DISPLAY
(RIBBON CABLE TO
DISPLAY BOARD)

T.C. MOTOR CONTROL
BOARD INTERFACE
(SIDE ENTRY)

17748

ERGO KEYS

CABLE ASSY
#41173

17751

40824
PCBA, P51
PROCESSOR
TC/TM
J16
MAGNET

J1
MAGNETIC
SWITCH
#40854

J2
P2
P3

TRANSFORMER
(PART OF #27962)

P1
P4

CONFIG
PCBA

17752

CSAFE #1 PORT
(TOP ENTRY)

SOFTWARE
PROGRAMMING
PORT
(TOP ENTRY)

CSAFE #2 PORT

KEYBOARD

INDEX (ZERO-POINT)
LED INDICATOR
#40825 ROTARY ENCODER
256 QUAD COUNT/REV
> 300 MILLION CYCLE LIFE
INDEX SENSOR

DEPENDENCY
MECHANISM

#40837
PCBA, ENCODER
POSITION SENSOR

17749

KEYPANEL:
#17716 TC916

35774-001 or
35774-002

32533-001

#27319

CONFIGURATION
PLATE
ASSEMBLY

LINE
FILTER

CABLE ASSY
#41194

T.C. TREADLE
POSITION SENSOR

CABLE ASSY, T9 HR,
PROCESSOR SIDE

#41175

17754

NOT SHOWN:
#27965
THERMAL TRANSFER
PAD (SILPAD)
#27571
PAD, VSD CLAMP

17744

17747

#41387
PCBA, AC DRIVE III

CABLE ASSY, FRONT ROC
#41193

17755

P14

WHT

P18

J1
J3

CIRCUIT
BREAKER

9 8 7

17746

T.C. PISTON
CONTROL

CABLE ASSY, T9 HR, HANDRAIL SIDE
#41443

CONTACT/
TELEMETRY HR
#41180

RED

P23

P19
P11

DS6

CABLE ASSY
#41169

GREEN

P5 P6

P10

THERMAL
SWITCHES
P9

BLK

GREEN

TP9
+16V

RED

#41008
TOUCH SENSOR
ASSY

P12

P15

P20

GRADE
SENSOR

ROC BAR
ASSEMBLY

#27122
Installs in place of
choke assembly
on Non-European
treadmills.

MAIN
MOTOR
#27487

DS5

17753

MAX

TRAVEL

CENTER

MIN

HYDRAULIC
CYLINDER

TC916
TREADCLIMBER

T. BROWN 6/15/05

120V VERSIONS
TOP-LEVEL WIRING

17750

Nautilus® TreadClimber®, Model TC916 Service Manual 51

Wiring Schematic

1.
2.
3.
4.

RED

BLK

WHT

YEL

ERGO KEYS
41449
OVERLAY
17739

41193

(C3)

17824
3

(C3)

P10

JUMPER 1
27122

P12

BLU

BRN

J2 J16

J14

BLU

BRN

(C2)

PCB

CONFIGURATION
PLATE ASSY
120V AC 17719

ENCODER ASSY
17545

2
17785
NEMA
5-20 P

UPRIGHT ASSY TC9 17626

MODEL ASSY, TREADCLIMBER T9 00200-001

J3
J1 (NO CONNECTION)

MAGNET
41154

MAGNETIC SWITCH
ASSY 40854

KEYPANEL TC9
17716

CONSOLE ASSY TC9 17670

41194

7 TRANSFORMER
12
27964

HYDRAULIC CYLINDER
ASSY 17810

17826

17824
3

17778

17498

P20

P15

P11

P14

(C1)

C'SAFE #1 PORT

SOFTWARE
(C2)
PROGRAMMING PORT

CONSOLE, PCBA, P51
40824
PROCESSOR TC/TM
J15

(C1)

J17
J11
J10 J1

PBCA AC DRIVE
17688
VSD ASSY
T9

41173

41442

41175

INSTALLS IN PLACE OF CHOKE ASSY ON NON-EUROPEAN EQUIPMENT
POWER CABLE LENGTH 12FT.
SAME TWO PLACES.
POWER CORD IS COUNTRY SPECIFIC ON INTERNATIONAL MODEL

17786

27000

CTHR
41180

MAIN MOTOR
27487

41443

PCBA, C52 LCD
DISPLAY 40865

C'SAFE #2 PORT

Wiring Schematic: 110 vac domestic

Nautilus® TreadClimber®, Model TC916 Service Manual 53

17786

27000

CTHR
41180

MAIN MOTOR
27487

41443
41193

RED

BLK

WHT

YEL

(C3)

17824
3

(C3)

P10
CHOKE
41404

P12

J2 J16

J14

BLU

BRN

(C2)

PCB

CONFIGURATION
PLATE ASSY
230V AC 17823

ENCODER ASSY
17545

2
17590
NEMA
6-15 P

UPRIGHT ASSY TC9 17626

MODEL ASSY, TREADCLIMBER T9 00200-002

J3
J1 (NO CONNECTION)

MAGNET
41154

MAGNETIC SWITCH
ASSY 40854

KEYPANEL TC9
17716

CONSOLE ASSY TC9 17670

41194

7 TRANSFORMER
27964
12

HYDRAULIC CYLINDER
ASSY 17810

17826

17824
3

17778

17859

P20

P19

P14

(C1)

C'SAFE #1 PORT

SOFTWARE
(C2)
PROGRAMMING PORT

CONSOLE, PCBA, P51
40824
PROCESSOR TC/TM
J15

(C1)

J17
J11
J10 J1

PBCA AC DRIVE
17688
VSD ASSY
T9

41173

41442

41175

ERGO KEYS
41449
OVERLAY
17739

PCBA, C52 LCD
DISPLAY 40865

C'SAFE #2 PORT

Wiring Schematic: 230 vac domestic

17844

TV IN

17786

MAIN MOTOR
27487

17845

RED

BLK

WHT

YEL

27000

41193

(C3)

17824
3

(C3)

P10
CHOKE
41404

P12

41399

BLU

BRN

(C2)

41194

PCB

CONFIGURATION
PLATE ASSY
230V AC 17823

ENCODER ASSY
17545

UPRIGHT ASSY TC9 17626

MODEL ASSY, TREADCLIMBER T9 00200-003

J3
J1 (NO CONNECTION)

MAGNET
41154

MAGNETIC SWITCH
ASSY 40854

KEYPANEL TC9
17716

CONSOLE ASSY TC9 17837 (17670)

J2 J16

J14

7 TRANSFORMER
27964
12

HYDRAULIC CYLINDER
ASSY 17810

17826

17824
3

17778

17859

P20

P19

P14

(C1)

C'SAFE #1 PORT

SOFTWARE
(C2)
PROGRAMMING PORT

CONSOLE, PCBA, P51
40824
PROCESSOR TC/TM
J15

(C1)

J17
J11
J10 J1

C'SAFE #2 PORT

PBCA AC DRIVE
17688
VSD ASSY
T9

41173

41442

41175

ERGO KEYS
41449
OVERLAY
17739

PCBA, C52 LCD
DISPLAY 40865

17846

41443
CTHR
41180

2X 17787

17787

Wiring Schematic: 230 vac international

Nautilus® TreadClimber®, Model TC916 Service Manual 55

TV IN

17844

17786

MAIN MOTOR
27487

17845

27000

CTHR
41180

41193

RED

BLK

WHT

YEL

(C3)

17824
3

(C3)

P10

JUMPER 1
27122

P12

BLU

BRN

BLU

BRN

(C2)

41194

PCB

CONFIGURATION
PLATE ASSY
120V AC 17719

ENCODER ASSY
17545

2
17785
NEMA
5-20 P

UPRIGHT ASSY TC9 17626

MODEL ASSY, TREADCLIMBER T9 00200-004

J3
J1 (NO CONNECTION)

MAGNETIC SWITCH
ASSY 40854

KEYPANEL TC9
17716

MAGNET
41154
CONSOLE ASSY TC9 17835 (17670)

J2 J16

J14

7 TRANSFORMER
12
27964

HYDRAULIC CYLINDER
ASSY 17810

17826

17824
3

17778

17498

P20

P15

P11

P14

(C1)

C'SAFE #1 PORT

SOFTWARE
(C2)
PROGRAMMING PORT

CONSOLE, PCBA, P51
40824
PROCESSOR TC/TM
J15

(C1)

J17
J11
J10 J1

C'SAFE #2 PORT

PBCA AC DRIVE
17688
VSD ASSY
T9

41173

41442

41175

ERGO KEYS
41449
OVERLAY
17739

PCBA, C52 LCD
DISPLAY 40865

41443

17846

2X 17787

17787

Wiring Schematic: 110 VAC Domestic with tv

17844

TV IN

17786

MAIN MOTOR
27487

17845

27000

CTHR
41180

41193

RED

BLK

WHT

YEL

(C3)

17824
3

(C3)

P10
CHOKE
41404

P12

J2 J16

J14

BLU

BRN

(C2)

PCB

CONFIGURATION
PLATE ASSY
2300V AC 17823

ENCODER ASSY
17545

2
17590
NEMA
6-15P

UPRIGHT ASSY TC9 17626

MODEL ASSY, TREADCLIMBER T9 00200-005

J3
J1 (NO CONNECTION)

MAGNET
41154

MAGNETIC SWITCH
ASSY 40854

KEYPANEL TC9
17716

CONSOLE ASSY TC9 17835 (17670)

41194

7 TRANSFORMER
27964
12

HYDRAULIC CYLINDER
ASSY 17810

17826

17824
3

17778

17859

P20

P19

P14

(C1)

C'SAFE #1 PORT

SOFTWARE
(C2)
PROGRAMMING PORT

CONSOLE, PCBA, P51
40824
PROCESSOR TC/TM
J15

(C1)

J17
J11
J10 J1

C'SAFE #2 PORT

PBCA AC DRIVE
17688
VSD ASSY
T9

41173

41442

41175

ERGO KEYS
41449
OVERLAY
17739

PCBA, C52 LCD
DISPLAY 40865

17846

41443

2X 17787

17787

Wiring Schematic: 230 VAC domestic with tv

Nautilus® TreadClimber®, Model TC916 Service Manual 57

Important contact numbers
If you need assistance, please have both the serial number of your machine and the date of purchase available when you
contact the appropriate Nautilus office listed below.

OFFICES IN THE UNITED STATES:
E-mail: cstech@nautilus.com
• NAUTILUS INNOVATION CENTER
Nautilus, Inc.
1886 Prairie Way
Louisville, Colorado, USA 80027
Vancouver, Washington, USA 98683
Phone: 800-NAUTILUS (800-628-8458)
Email: customerservice@nautilus.com
Fax: 800-898-9410
• TECHNICAL/CUSTOMER SERVICE
Nautilus, Inc.
World Headquarters
16400 SE Nautilus Drive
Vancouver, Washington, USA 98683
Phone: 800-NAUTILUS (800-628-8458)
Email: customerservice@nautilus.com
Fax: 877-686-6466
• CORPORATE HEADQUARTERS
Nautilus, Inc.
World Headquarters
16400 SE Nautilus Drive
Vancouver, Washington, USA 98683
Phone: 800-NAUTILUS (800-628-8458)

INTERNATIONAL:
For technical assistance and a list of distributors
in your area, please call or fax one of the following
numbers.

• international CUSTOMER SERVICE
Nautilus International S.A.
Rue Jean Prouvé 6
1762 Givisiez / Switzerland
Tel: + 41-26-460-77-77
Fax: + 41-26-460-77-70
Email: technics@nautilus.com

BUSINESS Offices:
• Switzerland Office
Nautilus Switzerland S.A.
Tel: + 41-26-460-77-66
Fax: + 41-26-460-77-60
• GERMANY and AUSTRIA OFFICE
Nautilus GmbH
Tel: +49-2204-610-27
Fax: +49-2204-628-90
• ITALY OFFICE
Nautilus Italy s.r.l.
Tel: +39-031-51-10-86
Fax: +39-031-34-24-97
• United Kingdom OFFICE
Nautilus UK Ltd.
Tel: +44-1908-267-345
Fax: +44-1908-267-346
• china OFFICE
Nautilus Representative Office
Tel: +86-21-523-707-00
Fax: +86-21-523-707-09

Page intentionally left blank

Nautilus® TreadClimber®, Model TC916 Service Manual 59

Model TC9.16

©2006. Nautilus, Inc. All rights reserved. Nautilus, the Nautilus Logo, ROC, TreadClimber, StairMaster and Changing the Game in Health and Fitness
are either registered trademarks of trademarks of Nautilus, Inc. Polar and Fantastic are registered trademarks of their respective companies.
Nautilus, Inc. World Headquarters,
16400 SE Nautilus Drive, Vancouver, Washington, USA 98683
1-800-NAUTILUS www.nautilus.com

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Nautilus Treadclimber Tc916 Users Manual

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