Bowflex 1000 Users Manual
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2015-03-12
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Nautilus®       Bowflex®       Schwinn® Fitness        StairMaster®       Universal®       Nautilus Institute®
Assembly Manual
®®
Bowflex® TreadClimber® 1000, 3000 & 5000
P/N 001-7142 Rev B (01/09)

Table of Contents
Product Specifications ....................................................................................................................................................1
Important Safety Instructions .........................................................................................................................................2
Before You Assemble .......................................................................................................................................................3
  Basic Assembly Principles ................................................................................................................................3
  Select Your Workout Area .................................................................................................................................3
  Machine Mat .......................................................................................................................................................3
Parts................ ....................................................................................................................................................................4
Hardware ...........................................................................................................................................................................6
Assembly ............................................................................................................................................................................7
  Put the Treadles on the Base ............................................................................................................................7
   Connect the Speed and Step Pickup Wires ...................................................................................................8
  Lock the Treadles ................................................................................................................................................9
   Attach the Drive Belt ..........................................................................................................................................9
   Attach the Uprights ..........................................................................................................................................10
   Attach the Upright Junction ...........................................................................................................................11
   Attach the Cosmetic Plugs ..............................................................................................................................11
   Attach the Console/Handlebar Assembly ....................................................................................................12
   Attach the Hydraulic Cylinders ......................................................................................................................13
   Inspect the Assembly ......................................................................................................................................13
   Attach the Frame Covers .................................................................................................................................14
  Adjust Speed Sensor and Attach the Rear Cover .......................................................................................15
   Attach the Drive Covers ..................................................................................................................................16
  Attach the Side Foot Support Platforms ........................................................................................................16
   Apply Decals .....................................................................................................................................................17
   Inspect the Assembly ......................................................................................................................................17
   Attach the Power Cord ....................................................................................................................................17
  Calibration (TC 3000 and TC 5000 only) ..........................................................................................................18
   If Calibration Fails .............................................................................................................................................19
   Explanation of Calibration Display Messages .............................................................................................19
Troubleshooting ..............................................................................................................................................................20 
Exploded Views ..............................................................................................................................................................23
Important Contact Numbers .........................................................................................................................................27

Assembly Manual 1
  Physical Dimensions
    Length   46 inches (117 cm)
    Width   28.5 inches (72.5 cm)
    Height   55.25 inches (140.5 cm)
    Weight   185 pounds (84 kg)
    Shipping Weight   220 pounds (100 kg)
  System Capacities
    Maximum Weight Capacity   300 lbs (136 kgs)
    Speed
       TC1000   0.5 to 3.8 MPH (0.8 to 6.1KPH )
      TC3000 and TC5000   0.7 to 4.0 MPH (1.1 to 6.4 KPH)
    Workout Resistance Levels   1 to 12
    Warranty Length    See the Warranty section for full 
 information per machine type
  Component Specifications
    Belt     7.75 in x 38.5 in (19.5 cm x 98 cm)
    Motor   0.5 hp continuous duty
    Treadmill Incline   0% Grade
    Frame   Powder-coated steel
    Operational Voltage   95 to 130 VAC   50 - 60 Hz
    Operational Current   12A Max
      A short 14 gauge, 3 wire extension cord is permissible.
  Regulatory Approvals Marks =   c-ETL-US  The standard for Safety  
  for Motor-Operated Massage and Exercise Machines, UL 1647, 3rd Ed. and 
  Motor-Operated Appliances, CAN/CSA-C22.2 No. 68-92   
    Patent Information  
U.S. and International Patents Pending 
Product Specifications
TC1000 TC3000 TC5000

2Assembly Manual
Important Safety Instructions
•   Keep bystanders and children away from the product you are assembling at all times.
•    Do not connect power supply to the machine until instructed to do so. 
•    Make sure assembly is done in an appropriate work space away from foot traffic and exposure to 
bystanders.
•   Some components of the machine can be heavy or awkward.  Use a second person when doing    
  the assembly steps involving these parts. Do not do steps that involve heavy lifting or awkward    
  movements on your own.
•    Set up this machine on a solid, level, horizontal surface.
•   Do not try to change the design or functionality of this machine. This could compromise the safety and  
  can void the warranty.
•   If replacement parts are necessary use only genuine Nautilus® replacement parts and hardware.     
  Failure to use genuine replacement parts can cause a risk to users, keep the machine from operating  
  correctly or void the warranty.
•   Do not use or put the machine into service until the machine has been fully assembled and inspected  
  for correct performance in accordance with the Owner’s Manual.  
•    Read and understand the complete Owner’s Manual supplied with this machine before first use.    
  Keep the Owner’s Manual for future reference.
This icon means a potentially hazardous situation which, if not avoided, could result in death or 
serious injury.
Read and understand all warnings on this machine.
Carefully read and understand the Assembly Manual.
Obey the following warnings:

Assembly Manual 3
Basic Assembly Principles
Here are a few basic assembly tips that can make assembly of the Bowflex® TreadClimber® exercise machine quick and 
easy.
1.    Gather the pieces needed for each step prior to starting the step.
2.   Turning towards the right tightens all the bolts and locknuts on your 
Bowflex
®
TreadClimber
®
. Turning towards the left, 
loosens them.
3.    All of the tools needed for assembly of your 
Bowflex
®
 TreadClimber
®
 exercise machine have been included. These tools 
are only designed for one use. If damaged, substitute any commonly available 9/16” wrench and #2 screwdriver.
Note:  A utility knife or scissors will be required during the unpacking and assembly process 
(not included). 
Select Your Workout Area
Select where you are going to put your Bowflex
®
 TreadClimber
®
 exercise machine carefully. The best place for your 
TreadClimber
®
 machine is on a hard, level surface. You will need at least 20 inches (0.5 meters) on each side and in front 
of your TreadClimber
®
 machine, and at least 36 inches (0.75 meters) behind it for dismount. 
Make sure that the location you choose has a 10A power outlet within reach of the TreadClimber
®
 machine power cord, 
preferably to the right side of the machine where you will be less likely to step on the cord during dismount.
Note:  The TreadClimber
®
 machine is designed to plug into a grounded, non-GFI outlet only. To determine if your outlet or 
circuit breaker is GFI, look for a test and reset button on them. If they have the test and reset button it is a GFI outlet 
or circuit breaker. 
Further, if you ever perform any repairs on your TreadClimber
®
 machine that require you to lay it on its side, you will need 
at least 60 inches (1.5m) to one side of your workout area.
Machine Mat
The Bowflex® TreadClimber® Machine Mat is an optional accessory for the TreadClimber® machine that helps keep 
your workout area free from debris and dust. The rubber machine floor mat provides a non-slip surface when mounting 
and dismounting the TreadClimber® machine, limits static discharge when you touch the machine, greatly reducing the 
possibility of display or running errors. A rubberized mat will protect your flooring when you are performing repairs or 
maintenance. Put your Bowflex® TreadClimber® Machine Mat in your selected workout area before begining assembly to 
protect your floors and your TreadClimber® machine from damage.
Before You Assemble

4Assembly Manual
Parts
Box 1 contains:
Qty: 1
Descr:  Control Panel/Handlebar Assembly
Qty: 2
Descr: Left and  Right Side Foot Support Platform
Qty: 1
Descr:  Right Side Plastic Frame Cover
Qty: 1
Descr:  Left Side Plastic Frame Cover
Qty: 1
Descr:  Left Side Plastic Drive Cover
Qty: 1
Descr:  Right Side Plastic Drive Cover
Qty: 2
Descr:  Left & Right 
Hydraulic 
Cylinder
Qty: 1
Descr:  Left 
Upright 
Support
Qty: 1
Descr:  Rear Cover 
Qty: 2
Descr:  Plastic Upright Junction Covers
Qty: 1
Descr:  Right 
Upright 
Support

Assembly Manual 5
Box 1 also contains:
Qty:1 Owner’s Manual Bag 
Contains the following:
•   The Bowflex® TreadClimber®  Assembly Guide and Owner’s 
Manual
•  (1) Drive Belt 
•  Power Cord 
•  (2) Treadle Decals
•   (2) Drive Cover Decals
•    TreadClimber® Safety Key *Note: TC1000 Safety Key plugged 
into console for shipping.
•   Heart Rate Monitor Chest Strap (TC5000 Only)
•  (1) #2 Phillips Screw Driver
Qty:1  Assembly Hardware Bag
Contains the following:
•  (1)  #2 Phillips Screwdriver
•  (2) 5/16" x 1 1/2" Button Head Screw
•   (1) 3/16" Hex Key
•  (12) 5/16" Flat Washers SAE 
(smaller O.D.)
•   (1) 5/32" Hex Key
• ( 2) 5/16" Acorn Nut
• (1) 9/16" Open End Wrench
•  (6) 1/4" x 1" Flat Head Screw
•  (2) 5/16" Flat Washers 
• ( 4) 3/8" Cosmetic Plugs
•  (14) 5/16" x 1" Button Head Screw
•  (16) #10 Phillips
Note:  Occasionally extra parts are included.
Parts
Box 2 contains the TreadClimber® treadles
Box 3 contains the TreadClimber® base
Qty: 1
Descr:  TreadClimber® Treadle Assembly
Qty: 1
Descr:  TreadClimber® Base
Cylinder Stud

6Assembly Manual
Qty: 1
Descr: #2 Phillips Screwdriver
Qty: 1
Descr: 3/16” Hex Key
Qty: 1
Descr: 9/16” Open End Wrench
Qty: 1
Descr: 5/32” Hex Key
Qty: 6
Descr: 1/4” x 1” Flat Head Screw
Qty: 2
Descr: 5/16” x 1 1/2” Button Head Screw 
Qty: 16
Descr: #10 Phillips Head Screw 
Qty: 14
Descr: 5/16” x 1” Button Head Screw 
Qty: 2
Descr: 5/16” Flat Washer
Qty: 12
Descr: 5/16” Flat Washer SAE
Qty: 4
Descr: 3/8” Cosmetic Plugs
Qty: 2
Descr: 5/16” Acorn Nut
Hardware 
Tools: 
Parts: 
Qty: 1
Descr: Drive Belt
Qty: 1
Descr: Safety Key with Clip (Models TC3000 & TC5000 only.)
Hardware: 

Assembly Manual 7
Assembly
Figure 1-1
Step 1:  Put the Treadles on the Base
Parts:
    •  TreadClimber® Base Assembly
    •  TreadClimber® Treadle Assembly
Hardware:
    •  (4) 3/8” X 1 1/4” Hex Bolts (preassembled)
   Note:  Hardware is only hand tightened. Finish tightening 
the hardware in Step 1-5 below.
Tools:
    •  9/16” Open End Wrench (included)
    •  Scissors or other cutting tool
    •  Ruler
   Note: This step requires two people.
1-1   Unlock the latch lever (see Figure 1-1).
1-2   Lower the tower treadle assembly onto base with two 
people. 
1-3   Align roller casting flush to the base (See Figure 1-2)
1-4  Use a ruler to center the treadles between the upright 
bases.
1-5   Tighten the (4) 3/8” x 1 1/4” Hex Bolts on the rear roller 
casting and base with the 9/16” open end wrench (See 
Figure 1-3). 
Note: Tighten the outside bolts on the rear roller casting first,    
    then the inner bolts. 
1-6  Cut the treadle zip tie located underneath the treadles.
Align roller casting so it lays flush 
on base
Figure 1-2
Figure 1-3

8Assembly Manual
Assembly
Figure 2-1
Step 2:   Connect the Speed and Step Wires 
(TC3000 and TC5000 only)
Parts:
    •   TreadClimber® Base and Treadle assembly from Step 1
2-1   Connect the Speed Wires (See Figure 2-1).
2-2   Connect the Step Wires (See Figure 2-2). Push any excess 
wire through holes in frame (See Figure 2-3).
Note:  The TC1000 is not equipped with step sensor function. Tuck 
unused step sensor wires through hole in frame.
Figure 2-2
Speed Wire
Figure 2-3

Assembly Manual 9
Assembly
Step 4:  Attach the Drive Belt
Parts:
    •   TreadClimber® Base and Treadle assembly from Step 3
    •   (1) Drive Belt
Tools:
    •  3/16” Hex Key (included)
4-1  Position the drive belt over the roller pulley and the motor 
pulley (See Figure 4-1).
4-2  Make sure that the belt is installed correctly into the grooves 
of the pulleys (See Figure 4-2).
4-3  Remove the motor shipping bolt from the motor pan with 
the 3/16” hex key (See Figure 4-3). 
Note:  Removing the shipping bolt will make the drive belt tight with 
spring-loaded tension. Be sure to keep the bolt in a safe place 
in case the machine must be disassembled for shipping or part 
replacement.
4-4  Put the unit in the upright position.
Figure 4-1
Figure 4-2
Figure 4-3
Figure 3-1 
Lever in locked position 
Step 3:  Lock the Treadles
Parts:
    •   TreadClimber® Base and Treadle assembly from Step 2
3-1  Line up the treadles parallel to each other and cut the zip 
tie connecting them.
3-2   Move the locking lever down and to the left and then up into 
the locked position until it clicks (See Figure 3-1).
3-3   From the front of the machine, press down on each treadle 
individually until they lock into the down position.
     The treadles might unlock during workout if they are not fully engaged.

10 Assembly Manual
Assembly
Figure 5-1
Step 5:  Attach the Uprights
Parts:
    •   TreadClimber® Base and Treadle assembly from Step 4
    •  (1) Left Upright Support & Hydraulic Cylinder
    •  (1)  Right Upright Support & Hydraulic Cylinder
Hardware:
    •  (2) 5/16” x 1” Button Head Screws
Tools:
    •  3/16” Hex Key
5-1   Screw a 5/16” x 1” button head screw half way into the 
outside of the left and right lower upright brackets of the 
base assembly (See Figure 5-1).
5-2   Put the left upright on the left upright bracket (See Figure 
5-2) so that it rests on the button head screw (See Figure 
5-3). The cylinder bracket will be at the top and face the 
rear of the machine.
Note:  Make sure the decal on the upright support faces outward from 
the machine.
5-3   Repeat on the opposite side.
Figure 5-2
Figure 5-3

Assembly Manual 11
Assembly
Figure 6-1
Step 6:  Attach the Upright Junction
Parts:
    •   TreadClimber® Base and Treadle assembly from Step 5
    •  (2) Plastic Upright Junction Covers
6-1  Put the plastic upright junction cover on the top of the left 
upright support (See Figure 6-1).
Note:  Make sure the plastic upright junction cover extends to the 
rear of the machine.
6-2  Repeat on opposite side.

12 Assembly Manual
Assembly
Figure 7-1
Step 7:   Attach the Console/  
Handlebar Assembly
Parts:
    •  TreadClimber® Base and Treadle assembly from Step 7
    •  Console/Handlebar Assembly
Hardware:
    •  (6) 5/16” x 1” Button Head Screws
    •  (6) 5/16” Flat Washers SAE
Tools:
    •  3/16” Hex Key (included)
Note: This step requires two people.
7-1   Lift and position the console/handlebar assembly above 
the upright supports (See Figure 7-1).
7-2   Put the console/handlebar assembly cable through the top 
of the right upright support (See Figure 7-2). Make sure 
that the cable extends throught the bottom of the right 
upright.
7-3  Put both sides of the console/handle bar brackets into the 
tops of the upright supports at the same time. Do not crimp 
the cable.
7-4   Tighten the hardware with the 3/16” hex key (See Figure 
7-3).
7-5  Connect the cable from the upright support to the cable on 
the right side of the base upright bracket (See Figure 7-4). 
Repeat this step on the other side.
7-6   One person will hold the Console/Handlebar assembly 
while the second person removes the 5/16” x 1” button 
head screw at the base of the support from each side.
7-7   Lower the upright on to the upright bracket base. Do not crimp 
the cables. Drop the upright until flush with the base frame. 
7-8  Attach the upright with (6) 5/16” x 1” button head screws 
and (6) 5/16” flat washers SAE.
Note:  Tighten the front (2) screws first (1 per upright) and then 
the (4) side screws, two per outer side of upright (See 
Figure 7-5). 
Figure 7-2
Figure 7-3
Figure 7-4
Figure 7-5

Assembly Manual 13
Assembly
Figure 9-1
Figure 9-2
Step 9:  Attach the Hydraulic Cylinders
Parts:
    •  TreadClimber® Base and Treadle assembly from Step 8
Hardware:
    •  (2) 5/16” x 1 1/2” Button Head Screws
    •  (2) 5/16” Acorn Nuts
    •  (2) 5/16” x 1” Button Head Screws (preassembled)
    •  (2) 5/16” Flat Washers (preassembled)
Tools:
    •  3/16” Hex Key (included)
    •  9/16” Open End Wrench (included)
Note: This step requires two people.
9-1   Attach the hydraulic cylinder to the upright bracket with (1) 5/16”x 1 1/2” 
Button Head Screw and (1) 5/16” Acorn Nut (Figure 9-1).
Note:  Make sure that the single white arrow, located on the Workout Level 
Setting Dials at the top of the hydraulic cylinders, is pointing up and to 
the rear of the machine.
9-2   Remove the pre-installed (1) 5/16” x 1” Button Head Screw and (1) 5/16” 
Flat Washer from treadle. Lift treadle and slide the lower shock eyelet 
onto the treadle stud. 
9-3   Attach the hydraulic cylinder with the (1) 5/16” x 1” button head screw 
and (1) 5/16” flat washer (Figure 9-2).
9-4   Tighten the hardware with the Hex Key and Open End Wrench.
Figure 8-1
Step 8:  Attach the Cosmetic Plugs
Hardware:
    •  (4) Cosmetic Plugs
8-1  Insert the cosmetic plugs into the holes on the top, inside and 
outside of the left upright support (See Figure 8-1).
8-2 Repeat on opposite side.

14 Assembly Manual
Assembly
Figure 11-1
Figure 11-2
Step 11:  Attach the Frame Covers
Parts:
    •   TreadClimber® Base and Treadle assembly from Step 10
    •  (1) Left Plastic Frame Cover
    •  (1)  Right Plastic Frame Cover
Hardware:
    •  (6) #10 Phillips Head Screws
Tools:
    •  #2 Phillips Head Screwdriver (included)
11-1   Attach the left and right Plastic Frame Covers to the sides 
of the base frame with (6) #10 Phillips Head Screws (3 per 
side) and the provided #2 Phillips screwdriver (See Figures 
11-1 and 11-2).
Step 10:   Inspect the Assembly
10-1  Remove the plastic film from the console face.
10-2    Inspect all of the attachments and securely tighten all of 
the bolts before proceeding to Step 11.

Assembly Manual 15
Figure 12-1
Figure 12-2
Step 12:  Adjust Speed Sensor and Attach    
           the Rear Cover
Parts:
    •   TreadClimber® Base and Treadle assembly from Step 11
    •  (1) Rear Cover
Hardware:
   •  (4) #10 Phillips Head Screws
Tools:
   •  #2 Phillips Head Screwdriver (included)
12-1  Hold a stiff business card, ID card, or similar object onto 
the inside of the drive pulley. Adjust the speed sensor 
towards the card until it just makes contact. 
12-2  Remove object. 
12-3  Attach the rear cover to the back of the frame with the (4) 
#10 Phillips Head Screws (2 per side) and the provided #2 
Phillips Head Screwdriver (See Figure 12-1 and 12-2).
Assembly

16 Assembly Manual
Assembly
Figure 14-1
Figure 14-2
Figure 13-1
Step 13:  Attach the Drive Covers
Parts:
    •   TreadClimber® Base and Treadle assembly from Step 12
    •  (1) Left Plastic Drive Cover
    •  (1)  Right Plastic Drive Cover
Hardware:
    •  (6) #10 Phillips Head Screws
Tools:
    •  #2 Phillips Head Screwdriver (included)
13-1  Attach the left and right Plastic Drive Covers to the sides of the 
base with (6) #10 Phillips Head Screws (3 per side) and the provided 
#2 Phillips screwdriver (See Figures 13-1). Install upper screw first. 
Note:  Do not tighten hardware until all screws have been installed.
Step 14:   Attach the Side Foot  
Support Platforms
Parts:
    •   TreadClimber® Base and Treadle assembly from Step 13
    •  (1) Left Foot Support Platform
    •  (1)  Right Foot Support Platform
Hardware:
    •  (6) 1/4” x 1” Flat Head Screws
Tools:
    •  5/16” Hex Key (included)
14-1   Attach the right and left side foot support platforms to each treadle 
with (6) 1/4” x 1” Flat Head Screws (3 per side) (See Figures 14-1 
and 14-2).

Assembly Manual 17
Assembly
Figure 17-1
Incoming Power Plug      Main Power Switch
Illustration 15-A:  
TreadClimber® Drive and  
Treadle Decals
Treadle decal  
1 per side
Drive decal  
1 per side
Figure 15-1
Step 15:  Apply Decals
Parts:
  •   TreadClimber® Base and Treadle assembly from Step 14
  •  (2) Treadle Decals
  •  (2) Drive Cover Decals
Tools:
  •  #2 Phillips Head Screwdriver (included)
15-1   Clean the application surface with a wet cloth and dry 
thoroughly with a towel.
15-2  Remove the relase backing on the decal.
15-3   Center the decal on the appropriate application surfaces 
(See Figure 15-1) for locations.
15-4  Rub the decal onto the surface to force out the air bubbles.
Step 16:  Inspect the Assembly
 16-1  Inspect your machine to make sure that all of it has been 
assembled correctly, there are no loose or missing parts 
and that all of the hardware has been tightened.
Step 17:  Attach the Power Cord
17-1  Make sure that the Main Power Switch is in the “Off” 
postition.
17-2  Carefully insert the power cord into the Incoming Power Plug 
at the rear of the base unit (See Figure 17-1).
Note:   Always plug cord into the base before plugging into the 
wall outlet.
Note:   The TreadClimber® machine plugs into any standard, 
grounded (three-prong) wall outlet.
 NEVER remove the grounding prong from the power plug 
and never use a two-prong adapter without a grounding 
wire.
  Failure to visually check and test assembly 
before use can cause damage to the 
TreadClimber® machine and serious injury 
to users and bystanders and can also 
compromise the effectiveness of your exercise 
program.

18 Assembly Manual
Assembly
Figure 18-1 
Main Power Switch “On”
Figure 18-2 
TC5000 Power & Slower Buttons
É
0/7 %2 -/$ 5,%
4/34!24
0RESS*"7,
 
--
Figure 18-3 
TC3000 Power & Slower Buttons
Step 18:  Calibration (TC3000  
 and TC5000 only)
Note:   During calibration, observe the walking belt alignment.  
Belts do not need to be perfectly centered, but if they 
are far enough from center to cause a scraping sound, 
follow the belt alignment instructions in the Owner’s 
Manual. 
   Failure to calibrate your machine prior to use could result in  
  machine failure and could cause injury.
  During the entire calibration process, stand on the side 
foot support platforms or rubber mat only. Do not stand on 
the walking belts during this entire process.
Note:    Re-calibration is also neccessary in the event of a 
power outage or if a component like a belt or motor 
has been replaced.
18-1  Plug the power cord into the the wall outlet.
18-2  Turn on the Main Power Switch (See Figure 18-1).
18-3   Stand on the side foot support platforms or rubber floor 
mat. Do NOT stand on the belts.
18-4   Hold down the POWER and SLOWER buttons. Insert the 
Safety Key.
Note:    If the Safety Key is not fully inserted into the safety 
keyhole, the TreadClimber® will not operate.
18-5   Release the POWER and SLOWER buttons. The TIME 
display will read “CAL”, PrSS”,”Strt”.
18-6  Press the START/STOP button to start calibration.
Note:    The belts will start and stop and the displays will show 
various numbers that relate to the calibration process. 
Do NOT interrupt calibration.
18-7   Calibration will take about 3 minutes. When calibration 
has finished “CAL” “PASS” will show in the TIME 
display.
18-8  Remove and re-insert the Safety Key to clear the display.
When the Bowflex® TreadClimber® exercise machine has 
completed calibration, you may begin your workout.
Note:   During calibration the 30 meter LED on the TC5000 
signifies the belt speed sensor, 305 meters LED is the 
step sensor. Some models of the TC 3000 will show the 
step sensor in the DISTANCE window as a heart and the 
speed sensor in the SPEED window as a heart.

Assembly Manual 19
Assembly
Explanation of Calibration Display Messages (for information only):
During calibration, the TIME display will show you text messages updating you as to the status of calibration. When there 
is no text message in the TIME display window, the other displays will show the following:
HEART RATE (TC5000 Only) – will show the status of the motor control relay.
• “ON” signifies the power relay is on and energizing the motor. 
• “OFF” signifies the motor control relay is off and not energizing the motor.
CALORIES/CAL PER MIN – will show the version number of the software.
TIME –  will show either a text message regarding auto-calibration (“d0nE”, “Strt”, etc.) or the actual Pulse Width 
Modulation (PWM) number (a number that provides digital information about base unit functions to the console) if 
START/STOP, FASTER or SLOWER is pressed during calibration.
MILES/TOTAL STEPS (DISTANCE/MILES for TC3000) –  will show the calibration of the total step count.
SPEED – will display the actual belt speed during the calibration function.
If Calibration Fails (Screen Displays “Cal Fail” Message):
This error usually indicates that the console is unable to determine the speed of the belts. Take the following steps:
  1.  Unplug the unit and remove the three back covers.
  2.   Hold a stiff business card, ID card, or other similar onto the inside of the drive pulley.  Adjust the speed sensor to-
wards the card until it just makes contact.
  3.  Remove the card.
  4.  Plug unit in and recalibrate.
If calibration is successful:
  •  Replace the three back covers.
If calibration is not successful:
  •   Leave plastic covers off and contact customer care for assistance. ( See Important Contact Numbers page at the 
back of this manual).

20 Assembly Manual
Troubleshooting
Condition / Problem Things to Check Solution
Unit will not power up/turn on/
start
Outlet Make sure outlet is functioning correctly. Verify 
this by plugging another object (ex: lamp) into 
the outlet.  If outlet is connected to a light 
switch, check to make sure it is on.  If outlet is 
not functioning find a working outlet.
Power cord not plugged in Make sure the power cord is firmly secured to 
A/C inlet on the unit and firmly inserted into a 
non-GFI wall socket.
Power switch turned off Make sure the power switch at the rear of the 
unit is in the “ON” position.
Safety key not plugged in Plug Safety Key into console (See Emergency 
Stop Procedure within the Important Safety 
Precautions section).
LED Diagnostic needed Remove rear plastic covers and contact cus-
tomer service for assistance.
Speed displayed is not accurate Display set to wrong unit of mea-
sure. (English/Metric)
Change display units (See Owner’s Manual).
Out of calibration Re-calibrate machine (See Calibration procedure 
in Owner’s or Service Manual).
Heart rate not displayed while 
using chest strap
Transmitter not making good con-
tact with skin
Moisten skin contact area on the chest strap.
Electromagnetic interference Turn off any television, AM radio, microwave, or 
computer within 6 feet (2 meters) of the Tread-
Climber® fitness machine.
Chest strap transmitter Test chest strap with another HR monitoring 
device such as HR watch or a  machine at a gym.  
If transmitter has good skin contact and still is 
not found to be emitting HR signal, replace chest 
strap transmitter.
HR receiver If chest strap is known to work with other 
devices and no sources of interference are 
present, or console has been tested with a Pulse 
Simulator and is not receiving the signal, replace 
the HR receiver.
Walking belt misalignment Rear belt guides Belts should ride on top of triangular black belt 
guides at rear of treadles.
Tracking adjustment Belts are not required to be perfectly centered 
and are typically farther out in the rear than they 
are in the front.  This may vary depending on 
user’s stride.  If belt is tracking to one side far 
enough to cause rubbing of belt follow belt align-
ment procedure in Owner’s Manual.
Speed dependent grinding or 
scraping noise in all modes
Belt alignment Check walking belt alignment.  Belt contact with 
metal guides under treadle can make loud grind-
ing sound.  If belts are misaligned follow belt 
alignment procedure in Owner’s Manual.
Rollers or motor Contact customer service for further assistance.

Assembly Manual 21
Troubleshooting
Condition / Problem Things to Check Solution
Hesitation or belt slipping
when walking on unit
Belt tension If belt hesitates or slips when walking on unit 
it may be caused by either a loose walking belt 
or a loose drive belt.  To determine the cause 
perform the following test: Stand beside Tread-
Climber® fitness machine and set speed to 2 
MPH. Step on one treadle and attempt to stop 
movement.  If one belt stops but roller at rear 
and other belt continue to turn walking belt ten-
sion should be  adjusted.  If both belts stop but 
motor is still turning the drive belt tension should 
be adjusted.
Walking belt tension Adjust walking belt tension at the front of the unit 
using the provided hex wrench on the exposed 
adjustment bolts located on each side of each 
front roller.  Be sure to adjust both bolts on each 
roller the same amount as to not disrupt belt 
alignment.  Tighten (turn clockwise) each adjust-
ment bolt in full turn increments.  After each 
adjustment, restart unit and check to see if belt 
slippage has been eliminated. Repeat if neces-
sary. If slipping feel persists after several adjust-
ments, stop and refer to drive belt checklist.
Drive belt Unplug power from unit. Wait 5-minutes to 
ensure no residual power remains. Turn unit on 
its side to expose its underside.  Verify shipping 
bolt has been removed.  If bolt is not present, 
return machine to upright posiition.  Remove 
left rear  plastic cover to expose “v” belt drive 
line and motor. Tighten nut on the motor tension 
bolt located on front side of motor in 1/2 turn 
increments until drive belt slippage is eliminated 
- DO NOT OVER TIGHTEN. Replace cover when 
finished.
“Tick” sound once per revolu-
tion or scraping noise from 
under treadle
Belt alignment Belt seam may be contacting metal belt guide 
under treadle.  Slight adjustment of belt should 
alleviate noise.  Follow belt alignment procedure 
in Owner’s Manual.
Floors Climbed Display not
updating
Size of steps taken In order for a step to register, the pedals must 
pass each other completely. This ensures that 
the magnet on the treadle passes the step sen-
sor. Make sure treadles are not locked in tread-
mill mode and that they are moving enough to 
register a step.
Step sensor Be sure step sensor wire is connected at rear of 
machine.

22 Assembly Manual
Troubleshooting
Condition / Problem Things to Check Solution
Knocking noises when unit is 
operating in TreadClimber or 
stepper mode, but not in tread-
mill mode
Treadle alignment Make sure treadles are centered between 
uprights and treadle is not contacting upright 
during use. If not centered remove rear plastic 
covers to access rear baseplate bolts. Loosen 
bolts slightly to allow treadles to be centered.  
Once centered tighten outer two bolts securely 
then tighten inner bolts securely.
Drive pulley and flywheel
pulley
Unplug power from Unit. Wait at least 5 minutes.
Remove left side plastic drive cover to expose 
“v” belt drive line. Using a ½” wrench, tighten 
the bolt that attaches the 4 ½” drive pulley to 
the drive shaft while holding the drive rollers 
still. Also, using a 5/32” hex wrench, tighten the 
setscrew on the flywheel motor pulley. Reinstall 
plastic drive cover.
Igus bushing If knocking sound seems to be coming directly 
from the rear roller, check igus bushings and 
replace if cracked.
Hydraulic cylinder bolts Check and tighten both upper and lower bolts 
that connect the hydraulic cylinders to the unit.
Belts stop turning and “err LS” 
or “err OS” is displayed
Calibration Re-calibrate machine using Owner’s Manual 
calibration procedure.
Speed sensor 1. Cycle power off and on.     
2. Put the machine in calibration mode (see Cali-
bration procedure in Owner’s Manual) but do not 
start the calibration routine.
3. Remove right rear plastic cover to view LED 
diagnostics on control board. 
Caution: Machine is on. Current is active!!
4. Locate LED D on the motor controller board.  
LED may be lit or unlit.   
5. Manually advance the treadle with your foot, 
and check if LED D is blinking.
6. If LED D is not blinking, then the speed sensor 
is not supplying a signal. Check that the speed 
sensor wire is plugged into the motor controller 
board, to the connection labeled “P1”. Check 
connection of speed sensor to jumper wire.  
Check speed sensor adjustment (use business 
card to set gap between sensor and pulley). If 
LED D still does not flash replace sensor.
I/O cables If LED D is flashing when the belts are turning 
but err LS or OS persists check connections and 
for signs of visible damage to any of the three I/O 
cables. If no damage, check continuity using a 
multi-meter. If a multi-meter is not available con-
tact customer service for replacement cables 
and further assistance.

Assembly Manual 23
Exploded Views
Ordering Replacement Parts
Call a Bowflex® TreadClimber® Representative at 1-800-NAUTILUS (1-800-628-8458) to order replacement parts and 
get assistance with your specific replacement or service requirements.
Overlay
TC1000
Console Assembly
(Not illustrated)
Console Top
Limit Switch
Tether Housing
Console Bottom
TC Handlebar
Round Plug
Upright
Cylinders/Shocks
Upright
Upright Junction
Covers
Electronics
Tether Housing
Assembly
Plugs

24 Assembly Manual
Exploded Views
Walking Belts 
R. Rear
Belt Guide
(L. Rear Belt Guide 
Not Shown)
Deck
Front Roller 
Keeper 
Front Roller 
L. Outer
Treadle Skin
Front Roller
Bracket
Inner Treadle
Skin (L & R)
Front Roller 
Bracket
R. Outer
Treadle Skin Foot Platform 
Belt Guide
Treadle
Friction 
Block
Rear Roller Bracket
Inner Roller
Bracket
Rear Roller
Bracket
Foot Platform
Treadle Stop
Bracket
Left Drive
Bracket
Drive Pulley
Single
Roller
Shaft Spacer
Bearing
M. Pivot Bushing
Washer Kit*
Speed Sensor
Bearing  
Right Drive
Bracket
Drive Base
Center 
Treadle Stop
Blocks
Rear Drive
Base
*Middle Pivot Bushing/Washer Kit:
(4) TC Igus® Bearing
(8) TC Igus® Washer
(4) TC Treadle Pivot Bushing

Assembly Manual 25
Exploded Views
Latch Arm
Red Cap
Safety Plate
Latch Offset Bracket
Locking Latches
Base Cover
Wheels
Main Frame
Lever Latch
Bracket
Plugs
Right Frame Cover
Motor Controller   
Right Drive Cover
Motor Tension Kit
Rear Cover
Motor Base
Motor
Cord Bracket
Plugs
TC Foot
Left Drive Cover
Left Frame Cover

Assembly Manual 27
Important Contact Numbers
Please  supply  the serial  number  of  your  machine  and  the  date  of 
purchase when you call Nautilus. Use the space in the boxes below 
to write down this information. Dial the number of the office close 
to you.
UNITED STATES OFFICES
TECHNICAL/CUSTOMER SERVICE
Phone:  800-NAUTILUS (800-628-8458)
E-mail: tcinquiry@nautilus.com
CORPORATE HEADQUARTERS
Nautilus, Inc.
World Headquarters
16400 SE Nautilus Drive
Vancouver, Washington, USA 98683
Phone:  (800) NAUTILUS (800) 628-8458
INTERNATIONAL OFFICES
INTERNATIONAL CUSTOMER SERVICE  
Nautilus International S.A.
Rue Jean Prouvé
1762 Givisiez / Switzerland
Tel:   + 41 26 460 77 77
Fax:  + 41 26 460 77 70
E-mail:  technics@nautilus.com
GERMANY and AUSTRIA
  Nautilus International GmbH 
  Albin-Köbis-Str. 4
  51147 Köln
    Tel: + 49 02203 2020 0
    Fax: + 49 02203 2020 45 45
ITALY 
Nautilus Italy S.r.l., Via della Mercanzia, 103
40050 Funo di Argelato - Bologna
Tel:  + 39 051 664 6201
Fax: + 39 051 664 7461
SWITZERLAND
Nautilus Switzerland SA
Rue Jean-Prouvé 6 
CH-1762 Givisiez
Tel:   + 41 26 460 77 66
Fax:  + 41 26 460 77 60
UNITED KINGDOM
Nautilus UK Ltd
4 Vincent Avenue
Crownhill, Milton Keynes, Bucks, MK8 0AB
Tel:   + 44 1908 267 345
Fax:  + 44 1908 267 345
CHINA
Nautilus (Shanghai) Fitness Co., Ltd.
7A No.728, Yan’an Road (West)
200050 Shanghai, China 
Tel:  + 86 21 523 707 00
Fax: + 86 21 523 707 099
Serial Number
Date of Purchase

©2008. Nautilus, Inc. All rights reserved. Nautilus, the Nautilus Logo, TreadClimber, the TreadClimber Logo, Bowflex, Bowflex Logo, StairMaster and Nautilus Institute are either registered trade-
marks or trademarks of Nautilus, Inc. Schwinn is a registered trademark. All other trademarks are owned by their respective companies. Nautilus, Inc., World Headquarters, 16400 SE Nautilus 
Drive, Vancouver, WA  98683 1-800-NAUTILUS www.nautilus.com
®®
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