Speed Scrub 24 32 Service Manual Nobles Ss5 Walk Behind Floor Scrubber

2018-06-20

: Sweepscrub Nobles-Speed-Scrub-24-32-Ss5-Walk-Behind-Floor-Scrubber-Service-Manual nobles-speed-scrub-24-32-ss5-walk-behind-floor-scrubber-service-manual 2784 file product_file

Open the PDF directly: View PDF .
Page Count: 51

Download
Open PDF In Browser	View PDF

SPEED SCRUB ®
AUTOMATIC SCRUBBER
The Safe Scrubbing Alternativer
Quick- Traint Controls

SERVICE INFORMATION MANUAL

9002377
Rev. 01 (09-2006)
www.nobles.com

*9002377*

A
B
FOR REPLACEMENT PARTS
Identify machine model and serial number.
1. (A) Identify the machine model.
2. (B) Identify the machine serial number from the data label.
Refer to the NOBLES Speed Scrub Parts Manual.
NOTE: Only use NOBLES supplied or equivalent parts. Parts and supplies may be ordered
online, by phone, by fax or by mail.

Tennant Company
PO Box 1452
Minneapolis, MN 55440
Phone: (800) 553--8033 or (763) 513--2850
www.nobles.com
FaST--PAK is a US registered and unregistered trademark of Tennant Company.
Specifications and parts are subject to change without notice.
Copyright E 2006 TENNANT Company, Printed in U.S.A.
ii

Nobles Speed Scrub 9002377 REV.00 (08-06)

Speed Scrub Service Information Manual
Table of Contents

page

MACHINE INFORMATION
Component Locator……………………….…...……………………………..……1
Machine Specifications………...…………………….……………………………5
MAINTENANCE
SAFETY LABELS………………………..…………………………………………7
BATTERY INSTALLATION…………………………………………………………
8
SQUEEGEE REMOVAL & INSTALLATION…………………………………… 8
CIRCUIT BREAKERS & FUSES…………………………………………………9
CHARGING BATTERIES………………………..…………………………………9
Battery Charger Specifications…………………………….……………... 9
On-Board Battery Charger Settings……………………………………… 9
Using the On-Board Battery Charger………………………………………10
On-Board Battery Charger Error Codes……………………………………
11
Using an Off-Board Battery Charger………………………………………11
ADJUSTING SCRUB HEAD BRUSHES…………………………………………12
Disk Brush Model………………...………………………………………. 12
Cylindrical Brush Model……………………………………..………………12
Adjusting an Uneven Brush Pattern…………………………………13
Adjusting a Tapered Brush Pattern…………………………………13
MACHINE MAINTENANCE……………………………………………..…………14
Daily Maintenance…………………………………………..………………14
Monthly Maintenance………………………………….……………………16
Battery Maintenance……………...………..……………………………… 17
Squeegee Blades……………………….…………………...………………17
Motor Maintenance……………………………………….…………………18
FaST System Maintenance……………………………………….…………
18
JACKING UP MACHINE……………………….……...……………………………
19
TRANSPORTING MACHINE…………………….……………...…………………
19
STORING MACHINE………………………………………...…..…………………19
FaST System Freeze Protection……………..……………………...…… 19
RECOMMENDED STOCK ITEMS……………..……………….…………………
20
BASIC TROUBLESHOOTING……………………….……………………………21
ELECTRICAL
Electrical Schematic…………………………...…..…………………..……………
23
Wiring Harness Detail………………………...………………..……………………
24
Control Board & BDI Details………………………………………………………30
Control Board & BDI Pin Charts……………………………………………………
31
BDI Diagnostic Fault Indicators……………………………………………………32
Electrical Symbols & Terms…………………………...……………..……………33
Key OFF Power Distribution (Off-Board Charger Disconnected)………………34
Key OFF Power Distribution (Off-Board Charger Connected)…………………35
Key OFF Power Distribution (On-Board Charger Disconnected)………………36
Key OFF Power Distribution (On-Board Charger Connected)…………………37
Key ON Power Distribution………………….………….…………………………38
Propel Forward System…………………………...……………………………… 39
Propel Reverse System………………………………………………………….. 40
Scrub Brushes……………………...…………………………..……………………
41
Vacuum Fan System…………………………..………………..………………..…
42
Conventional Solution Solenoid Valve & Hour Meter……………………………43
FaST Pump & Hour Meter…………………………………………………………44
Scrub Head Actuator LOWER (Extend)……………………………….…………45
Scrub Head Actuator RAISE (Retract)……………………………………………46
Wand Pump…………………………….……………………………………………47

Nobles Speed Scrub 9002377 REV.00 (08-06)

iii

Speed Scrub Service Information Manual

BEFORE CONDUCTING TESTS:

z Read and Follow ALL Safety Warnings and Precautions in Operator's
Manual
z Always use an ESD (Electrostatic Discharge) strap when working near
the Control Board
z Be cautious when working near Control Board – Battery voltage is
always present, even with Key OFF
z Always Disconnect Batteries when removing or replacing components

DURING TESTS:

z Call Technical Services if Diagnostic Time Exceeds One Hour with
Unknown Cause or Course of Action

Nobles Speed Scrub 9002377 REV.00 (08-06)

Speed Scrub Component Locator
(Page 1 of 4)

4
5

6
7

10
8

1.
2.
3.
4.
5.
6.

Battery Meter (Battery Discharge Indicator)
Reverse Trigger
Start Triggers (Propel/Scrub)
Brush Pressure Meter
Control Console Height Adjustment Lever
Speed Control Knob (Potentiometer)

Nobles Speed Scrub 9002377 REV.00 (08-06)

7.
8.
9.
10.
11.

Brush Pressure Switch
Off--Aisle Wand on/off Switch (option)
FaST System on/off Switch (option)
Main Power on/off Key Switch
Hour Meter

Speed Scrub Component Locator
(Page 2 of 4)

CONTROL BOARD AND
CIRCUIT BREAKERS

RECOVERY TANK
INTERLOCK SWITCH

VACUUM FAN
MOTOR M3
FRONT

FaST PUMP MOTOR M6

O
FR

BOTTOM
VIEW

N
T

FRONT

BOTTOM
VIEW
PROPEL MOTOR M4

Nobles Speed Scrub 9002377 REV.00 (08-06)

Speed Scrub Component Locator
(Page 3 of 4)

MOTOR
M1

CYLINDRICAL SCRUB
BRUSH MOTORS

MOTOR
M2

MOTOR
M1

DISK SCRUB
BRUSH MOTORS

MOTOR
M2

ACTUATOR SCRUB/TRANSPORT SWITCH
ACTUATOR RAISE LIMIT SWITCH
ACTUATOR LOWER LIMIT SWITCH

SCRUB HEAD ACTUATOR M5

Nobles Speed Scrub 9002377 REV.00 (08-06)

SCRUB HEAD ACTUATOR M5

Speed Scrub Component Locator
(Page 4 of 4)

ON-BOARD CHARGER

VACUUM FAN
SWITCH

CHARGER
INTERLOCK
SWITCH
(OFF-BOARD
CHARGER)

CONVENTIONAL
SOLENOID VALVE

CONTROL BOARD

STANDOFF

CIRCUIT
BREAKERS
BRUSH
CONTACTOR
CR1

CB1
CB2 25A
CB3 25A
CB4 25A
10A

RELAYS

CR2

100A FUSE F1

CR3
CR4

STANDOFF

CONTROL BOARD, FUSE, & CIRCUIT BREAKERS

Nobles Speed Scrub 9002377 REV.00 (08-06)

MACHINE SPECIFICATIONS
MODEL
LENGTH
WIDTH

Disk,
Disk,
Disk,
Cylindrical,
Cylindrical,
24 in / 600mm 28 in / 700mm 32 in / 800mm 26 in / 650mm 32 in / 800mm
53.4 in / 1,357 mm

55.5 in / 1,408 mm

58 in / 1,471 mm

55 in / 1,399 mm

25.4 in / 645 mm

29 in / 737 mm

33 in / 838 mm

28 in / 711 mm

34 in / 864 mm

44 in / 1120 mm

HEIGHT
MINIMUM AISLE TURN

53 in / 1,346 mm

59 in / 1,499 mm

64 in / 1,626 mm

62 in / 1,575 mm

64.5 in / 1,638 mm

WEIGHT

293 lb / 133 kg

320 lb / 145 kg

332 lb / 151 kg

342 lb / 155 kg

WEIGHT WITH BATTERIES

569 lb / 258 kg

593 lb / 269 kg

606 lb / 275 kg

615 lb / 279 kg

RECOVERY TANK CAPACITY

27 gal / 105 L

SOLUTION TANK CAPACITY

22.5 gal / 85 L
Transaxle, 24 V, .25 hp / .19 kW

DRIVE SYSTEM

Cleaning: 220 ft / 67 m per min Transporting: 235 ft / 72 m per min

TRAVEL SPEED, MAXIMUM
PRODUCTIVITY RATE
Theoretical

26,400 ft2 /
2,450 m2 h

30,800 ft2 /
2,860 m2 h

35,200 ft2 /
3,270 m2 h

28,600 ft2 /
2,660 m2 h

35,200 ft2 /
3,270 m2 h

PRODUCTIVITY RATE
Estimated Actual

17,875 ft2 /
1,660 m2 h

20,800 ft2 /
1,930 m2 h

24,000 ft2 /
2,230 m2 h

19,200 ft2 /
1,785 m2 h

24,000 ft2 /
2,230 m2 h

CLEANING PATH WIDTH

24 in / 600 mm

28 in / 700 mm

32 in / 800 mm

26 in / 650 mm

32 in / 800 mm

BRUSH DIAMETER

11.9 in / 302 mm

13.9 in / 353 mm

15.9 in / 404 mm

5.9 in / 151 mm

.6 gpm /

2.27 L/min

up to 120 lb / 54 kg

BRUSH PRESSURE
SOLUTION FLOW RATE
SQUEEGEE WIDTH

.5 gpm /
1.89 L/min

.50 gpm / 1.89 L/min

35.7 in / 908 mm
standard

41.3 in / 1,051 mm
standard

46.6 in / 1,185 mm
standard

41.3 in / 1,051 mm
standard

46.6 in / 1,185 mm
standard

31.5 in / 800 mm
narrow aisle

35.7 in / 908 mm
narrow aisle

41.3 in / 1,051 mm
narrow aisle

35.7 in / 908 mm
narrow aisle

41.3 in / 1,051 mm
narrow aisle

BRUSH MOTOR

Qty 2, .75 hp / .55 kW, 220 rpm, 24 V, 29 A

.85 hp / .63 kW, 640 W, 3--stage 5.7, 24 V, 26 A

VACUUM MOTOR

62 in / 55 mm -- 69 ft3 / 32.4 L3 /m

WATER LIFT -- AIR FLOW

Qty 4, 6 V

BATTERIES
BATTERY CAPACITY

Qty 2, .63 hp / .47 kW, 1500 rpm,
24 V, 23 A

WET (lead Acid) = 235 Ah @ 20 h rate

Sealed (Gel)= 200 Ah @ 20 h rate

RUN TIME PER CHARGE*

WET = Up to 5.0 hours

ON--BOARD CHARGER

120 VAC, 10 A, 50/60 Hz, 24 VDC, 20 A output
50 A nominal

TOTAL POWER CONSUMPTION

24 VDC

VOLTAGE DC

IPX3

PROTECTION GRADE
DECIBEL RATING AT OPERATOR’S EAR, INDOORS.**
VIBRATION AT CONTROLS

Gel = Up to 4.0 hours

67dBA

68dBA

<.39 ft/s2 / <.1188 m/s2

ACCELERATION RATE ON
OPERATOR -- MAX.
GRADE LEVEL, MAX.

<.34 ft/s2 / <.103 m/s2
.56 ft / .179 m /s2

Scrubbing 5% (3°), Transporting 8% (5°)

* Run times are based on Continuous Scrubbing Run Times.
** Sound levels (ISO 11201) as recommended by the American Association of Cleaning Equipment Manufacturers (AACEM) and OSHA.

Nobles Speed Scrub 9002377 REV.00 (08-06)

Nobles Speed Scrub (08--06)

FaST SYSTEM

Disk,
Disk,
Disk,
Cylindrical,
Cylindrical,
24 in / 600mm 28 in / 700mm 32 in / 800mm 26 in / 650mm 32 in / 800mm
20,075ft2 /
1,865m2 /h

PRODUCTIVITY RATE
Estimated Actual

22,750ft2 /
2115m2 /h

26,250ft2 /
2440m2 /h

21,000ft2 /
1950m2 /h

26,250ft2 /
2440m2 /h

SOLUTION PUMP

24 Volt DC, 3.5 A, 1.5 gpm / 5.6 L/min open flow, 60 psi / 4.13 Bar bypass setting

SOLUTION FLOW RATE

0.15 gpm /
0.57 L/min

CONCENTRATE FLOW RATE

0.0193oz /
0.57CC /min.

0.22 gpm / 0.83 L/min.
0.028oz / 0.83CC /min.

CONCENTRATE TO WATER
DILUTION RATIO

0.15 gpm /
0.57 L/min.

0.22 gpm /
0.83 L/min.

0.0193oz /
0.57CC /min.

0.028oz /
0.83CC /min.

1:1000

MACHINE DIMENSIONS

44 in
1,120 mm

Models:
A=
B=
C=

24 in / 600 mm
Disk

28 in / 700 mm
Disk

32 in / 800 mm
Disk

26 in / 650 mm
Cylindrical

28 in / 800 mm
Cylindrical

53.4 in / 1,357 mm
25.4 in / 645 mm
35.7 in / 908 mm

55.5 in / 1,408 mm
29 in / 737 mm
41.3 in / 1,051 mm

58 in / 1,471 mm
33 in / 838 mm
46.6 in / 1,185 mm

55 in / 1,399 mm
28 in / 711 mm
41.3 in / 1,051 mm

55 in / 1,399 mm
34 in / 864 mm
46.6 in / 1,185 mm

Nobles Speed Scrub 9002377 REV.00 (08-06)

Commonly Used Electrical Symbols & Terms
NOTE: The term “NORMALLY” refers to the components’ “at rest” or “de-energized” position

+
Wires Connected
Together

Wires Not
Connected Together

Normally Open
Normally Open
Double Throw
Switch
Momentary Switch

Relay Coil
(Part 1 of Relay)

Indicates Movement
from Normal Position

Battery

Circuit Breaker

Fuse

Normally Open Normally Closed
Normally Open
Normally Closed
Limit Switch
Push-Button Switch Push-Button Switch
Limit Switch

Normally Open

CR1

Plug-in
Connection

Diode

Normally Closed

CR1

Relay Contacts (Part 2 of Relay)

Indicates Component in
Position Other than Normal

Solenoid (Valve
or Actuator)

Indicates Component
is Energized

Potentiometer

Motor

Assembly

Information

Warning!

Terms & Abbreviations
AC – Alternating Current
BDI – Battery Discharge Indicator
CB – Circuit Breaker
CR – Relay (Contact Type)
LED – Light Emitting Diode
M – Motor
PWM (Pulse Width Modulation) – A method of using controlled on/off times to regulate voltage and current to an electrical device
Standoff – A common connecting point for multiple wires

Example of Wiring Numbers & Colors:
Wiring Color Codes
(Unless otherwise marked)
Right Most Digit
of Wire Number

0
1

Color of Wire

Tan
Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

Nobles Speed Scrub 9002377 REV.00 (08-06)

1 RED

13 BLK

Speed Scrub – Maintenance
(Page 1 of 16)

SAFETY LABELS
The safety labels appear on the machine in the locations indicated. Replace labels if they are missing or become
damaged or illegible.
WARNING LABEL -Located on recovery tank cover.

BATTERY CHARGE LABEL -Located on bottom side of recovery tank.

WARNING: Fire Or Explosion
Hazard. Batteries Emit Hydrogen
Gas. Keep Sparks And Open
Flame Away. Keep Battery
Compartment Open When
Charging.

SPINNING BRUSH LABEL Located on scrub head

WARNING: Spinning Brush.
Keep Hands Away. Turn Off Power
Before Working On Machine.

Nobles Speed Scrub 9002377 REV.00 (08-06)

Speed Scrub – Maintenance
(Page 2 of 16)

BATTERY INSTALLATION

SQUEEGEE REMOVAL & INSTALLATION

WARNING: Fire Or Explosion Hazard.
Batteries Emit Hydrogen Gas. Keep Sparks And
Open Flame Away. Keep Battery Hood Open When
Charging.

REMOVING SQUEEGEE ASSEMBLY

FOR SAFETY: When installing batteries, wear
protective gloves and eye protection. Avoid
contact with battery acid.

1. Park the machine on a level surface, remove the
key and set the parking brake if equipped.
2. Lift the squeegee lift lever to the upward position
(Figure 3).

Battery Specifications:
Four 6 volt, 235A/20h deep cycle batteries. Maximum
battery dimensions:
7.5 in / 190 mm W x 10.8 in / 275 mm L x 11.2 in / 284
mm H.
1. Park the machine on a level surface, remove the
key and set the parking brake, if equipped.
2. Carefully install the batteries into the battery
compartment tray (Figure 1). Arrange the battery
posts as shown (Figure 2).

FIG. 3

3. Remove the vacuum hose from the squeegee
assembly. Note loop and clip on hose (Figure 4).

FIG. 1

3. Connect the battery cables to the battery posts as
shown (Figure 2), RED TO POSITIVE (+) and
BLACK TO NEGATIVE (--).

FIG. 4

Loosen the knobs and slide squeegee assembly away
from pivot bracket (Figure 5).

235 A/20Ah
BLACK

RED
Machine
Front
FIG. 2

Nobles Speed Scrub 9002377 REV.00 (08-06)

FIG.5
F

Installation is in reverse order of removal.

Speed Scrub – Maintenance
(Page 3 of 16)

Check the squeegee blades for proper deflection.
The blades should deflect as shown (Figure 6).

CHARGING BATTERIES
ATTENTION: To prolong the life of the batteries
only recharge the batteries if the machine was
used for a total of 30 minutes or more. Do not leave
batteries discharged for lengthy periods.
WARNING: Fire Or Explosion Hazard.
Batteries Emit Hydrogen Gas. Keep Sparks And
Open Flame Away. Keep Battery Compartment
Open When Charging.
FOR SAFETY: When servicing batteries, wear
protective gloves and eye protection when
handling batteries and battery cables. Avoid
contact with battery acid.

12.5 mm

½”
FIG. 6

To adjust the blade deflection, place the squeegee
assembly on a level surface and adjust the casters
as shown (Figure 7).

2 mm
1/16”

BATTERY CHARGER SPECIFICATIONS

CHARGER TYPE:
-- FOR SEALED (Gel) BATTERIES
-- FOR WET (Lead acid) BATTERIES

S
S
S
S

OUTPUT VOLTAGE - 24 VOLTS
OUTPUT CURRENT - 20 AMPS
AUTOMATIC SHUTOFF CIRCUIT
FOR DEEP CYCLE BATTERY CHARGING

ON--BOARD BATTERY CHARGER SETTINGS
FIG. 7

CIRCUIT BREAKERS AND FUSES
FIG. 7

The machine is equipped with four resettable circuit
breakers and four fuses to protect the machine from
damage. If a breaker should trip, determine the cause,
allow the motor to cool then manually reset the circuit
breaker button. The circuit breaker panel is located
near the battery compartment (Figure 29). The fuses
are located inside the circuit breaker box. When
replacing a fuse never substitute a higher Amp rated
fuse than specified.

If your machine is equipped with the on--board charger,
the charger settings must be set for your battery type
before charging. Failure to properly set will result in
battery damage.
To determine your battery type, see battery label.
Contact your battery supplier if not specified.
To verify the setting of the charger, connect the charger
cord into an electrical receptacle. The charger will
display a sequence of codes. One of the codes will
either read “GEL” or “Acd” (Figure 41).
GEL = Set for sealed/maintenance free batteries
Acd = Set for wet/lead acid batteries

CIRCUIT BREAKERS:
10 A -- Main (A)
25 A -- Vacuum motor (B)
25 A -- Left brush motor (C)
25 A -- Right brush motor (D)
FUSES:
100 A -- Main
30 A -- Propel motor
7.5 A -- FaST system
7.5 A -- Off--aisle wand pump (located in control
console)
10

FIG. 41

Nobles Speed Scrub 9002377 REV.00 (08-06)
Nobles Speed Scrub (08--06)

Speed Scrub – Maintenance
(Page 4 of 16)

To change the setting, unplug the charger, peel up the
corner of the display label and set the switches
accordingly (Fig. 42). The charger cord must be
unplugged when resetting.

NOTE: The machine will not operate when charging.

FIG. 44

SEALED “GEL” BATTERY

WET “Acd” BATTERY

FIG. 42

USING THE ON--BOARD BATTERY CHARGER
IMPORTANT: Before charging, make sure that the
charger setting is properly set for your battery type
(See ON--BOARD CHARGER SETTINGS).
1. Transport the machine to a well--ventilated area.

6. The charger will display a sequence of codes once
the cord is connected (Figure 45).
Three--digits + the following code:
A = Charging current
U = Battery voltage
h = Charging time
C = Charging ampere--hours [Ah]
E = Energy used [Kwh]
“GEL” or “Acd” = Battery type the charger is
currently set for. Before charging make sure
your battery type matches the display:
GEL=Sealed, Acd=Wet (lead acid). To change
setting, see ON--BOARD CHARGER
SETTINGS.
Press the arrow button to review the codes.

2. Park the machine on a flat, dry surface. Turn the
key off and set the parking brake, if equipped.
3. If charging wet (lead acid) batteries check the fluid
level before charging (See BATTERY
MAINTENANCE).
4. Prop up the recovery tank for ventilation
(Figure 43).

FIG. 45

7. Once the charging cycle begins, the indicator lights
will progress from red, yellow to green. When the
green indicator light comes on, the charging cycle
is done. Unplug the charger cord.

FIG. 43

If the charger detects a problem, the charger will
display an error code (See ON--BOARD BATTERY
CHARGER ERROR CODES).

5. Connect the charger’s AC power supply cord into a
properly grounded receptacle (Figure 44).

Nobles Speed Scrub 9002377 REV.00 (08-06)

Nobles Speed Scrub (08--06)

Speed Scrub – Maintenance
(Page 5 of 16)

ON--BOARD BATTERY CHARGER ERROR CODES
DISPLAY CODE

FAULT

SOLUTION

bat

Loose or damaged battery cable

Check battery cable connections.

Battery exceeded maximum voltage level.

No action necessary.

E01

Exceeded maximum battery voltage allowed.

No action necessary.

E02

Safety thermostat exceeded maximum internal Check if the charger vents are obstructed.
temperature.

E03

Exceeded maximum time for charging phase
leaving the batteries undercharged due to a
sulfated or faulty battery.

Repeat the charging cycle and if the error
code E03 reappears check battery or
replace it.

SCt

Safety timer exceeded maximum charging
time. Interrupts charging cycle.

Replace battery.

Srt

Possible internal short circuit.

Contact Tennant Service 1-800-553-8033

USING AN OFF--BOARD BATTERY CHARGER
1. Transport the machine to a well--ventilated area.
2. Park the machine on a flat, dry surface. Turn the
key off and set the parking brake, if equipped.
3. If charging wet (lead acid) batteries, check the fluid
level before charging (See BATTERY
MAINTENANCE).
4. Prop up the recovery tank for ventilation
(Figure 46).
FIG. 47

7. The supplied charger will automatically begin
charging and shut off when fully charged.
NOTE: The machine will not operate when charging.
ATTENTION: Do not disconnect the charger’s DC
cord from the machine’s receptacle when the
charger is operating. Arcing may result. If the
charger must be interrupted during charging,
disconnect the AC power supply cord first.
FIG. 46

5. Connect the charger’s AC power supply cord into a
properly grounded receptacle.
6. Connect the charger’s DC cord into the machine’s
battery receptacle (Figure 47).

Nobles Speed Scrub 9002377 REV.00 (08-06)

Speed Scrub – Maintenance
(Page 6 of 16)

ADJUSTING SCRUB HEAD BRUSHES

CYLINDRICAL BRUSH MODEL

To ensure optimum scrubbing performance periodically
check the scrub head for proper adjustment.

After installing a new set of cylindrical brushes check
the brush pattern to ensure proper brush adjustment.
Brushes that are not properly adjusted will result in
premature wear and poor scrubbing performance
(Figure 50).

FOR SAFETY: Before adjusting scrub head, stop
machine on level surface, remove key and set
parking brake if equipped.

CORRECT BRUSH PATTERN
Even
Pattern

DISK MODEL
Tools required: Measuring device, 1--1/16 in / 27 mm
wrench and 15/16 in / 24mm wrench

Uneven
Pattern

INCORRECT BRUSH PATTERNS

Tapered
Pattern

1. With brushes installed, lower the scrub head and
apply medium brush pressure.
2. Turn machine off and remove key.
3. From the center front and back of scrub head,
measure the distance from the top edge of scrub
head to the floor (Figure 48).

FIG. 50

To Inspect the Brush Pattern:
1. Position the machine on a dry dusty floor or apply a
powdered substance, such as chalk.
2. Disconnect the drive motor wire connector to keep
machine from moving forward (Figure 51).

FIG. 48

4. If scrub head is not level, loosen the lock nut and
turn the scrub head leveling screw to level. Tighten
down the lock nut once head is level (Figure 49).

FIG. 51

3. Lower the scrub head to the floor and apply
maximum brush pressure.
4. Shut off the solution flow.
Lock
Nut

FIG. 49

5. Pull the triggers to create a brush pattern on the
floor.
6. Raise the scrub head and pull the machine away.
7. Observe the brush pattern on floor. If the brush
pattern is uneven or tapered, adjustment is
required.
8. Reconnect drive motor wire.

Nobles Speed Scrub 9002377 REV.00 (08-06)

Speed Scrub – Maintenance
(Page 7 of 16)

To Adjust an Uneven Brush Pattern:

To Adjust a Tapered Brush Pattern:

Tools required: Measuring device, 1--1/16 in / 27 mm
wrench and 15/16 in / 24mm wrench

Tools required: 3/8 in / 10mm wrench and 6mm hex
wrench

1. Measure the distance from the front edge of the
scrub head to the floor and from the back edge of
the scrub head to the floor (Figure 52). The
measurements should be the same.

1. Raise the scrub head off floor and remove key.
2. Remove the idler plate from the brush (Figure 54).

FIG. 54
FIG. 52

2. To level the scrub head, loosen the lock nut and
turn the leveling screw clockwise to lower the rear
of the scrub head or counter--clockwise to lower the
front (Figure 53).

3. Hold the brush plug shaft with a wrench and loosen
the 6mm hex screw (Figure 55).

FIG. 55

FIG. 53

4. To lower the brush end, turn the shaft clockwise for
the front brush and counter--clockwise for the rear
brush. Retighten hex screw (Figure 56).

3. Recheck brush pattern.
NOTE: Replace brush when bristles are worn to 5/8 in /
15 mm.

FIG. 56

5. Recheck brush pattern.
NOTE: Replace brushes when bristles are worn to 5/8
in / 15 mm.
14

Nobles Speed Scrub 9002377 REV.00 (08-06)

Speed Scrub – Maintenance
(Page 8 of 16)

4. Drain the solution tank (Figure 60).

MACHINE MAINTENANCE
To keep the machine in good working condition, it’s
important that the following maintenance procedures
are performed on a routine basis.
WARNING: Electrical Hazard. Disconnect
Battery Cables Before Servicing Machine.
DAILY MAINTENANCE (After Every Use)
1. Drain the recovery tank (Figure 57).

FIG. 60

5. Rotate pad or replace when worn (Figure 61).

FIG. 57

Rinse out the recovery tank (Figure 58).

Disk Model
FIG. 61

6. Empty and rinse out the debris trough (Figure 62).

FIG. 58

3. Remove the recovery tank float shut--off screen
and clean (Figure 59).

Cylindrical Brush Model
FIG. 62

7. Inspect the cylindrical brushes for wear. Rotate
brushes from front--to--rear every 50 hours (Figure
63). Replace when worn to a length of 5/8 in /
15 mm.

FIG. 59
Nobles Speed Scrub 9002377 REV.00 (08-06)

Speed Scrub – Maintenance
(Page 9 of 16)

15mm
(5/8”)

Cylindrical
Brush Model
FIG. 66

FIG. 63

8. Remove debris buildup from the underside of the
cylindrical brush scrub head, including the idler
plates and drive hubs (Figure 64).

11. Clean the machine with an all purpose cleaner and
damp cloth (Figure 67).
FOR SAFETY: When cleaning machine, do not
power spray or hose off machine. Electrical
malfunction may occur.

Cylindrical Brush Model
FIG. 64

9. Wipe the squeegee blades clean (Figure 65). Store
the squeegee assembly in the raised position to
prevent blade damage.

FIG. 65

10. Check the condition of the squeegee blade wiping
edge (Figure 66). Rotate blade if worn (See
SQUEEGEE BLADES).

FIG. 67

12. Inspect the condition of the scrub head skirt,
replace if worn or damaged (Figure 68).

Disk Model

Cylindrical Brush Model
FIG. 68

Nobles Speed Scrub 9002377 REV.00 (08-06)

Speed Scrub – Maintenance
(Page 10 of 16)

13. FaST Model: Connect the FaST--PAK supply hose
to the storage plug when not in use (Figure 69).
Remove any dried concentrate from the hose
connector by soaking it in warm water.

2. Check the cylindrical brush belt tension every 100
hours (Figure 72). Belt tension should flex 0.1 in /
3mm at midpoint, with 2.5--2.7 lb / 1.13--1.22 kg
force.
WARNING: Electrical Hazard. Disconnect
Battery Cables Before Servicing Machine.

FIG. 69

14. Clean wet/lead acid batteries to prevent corrosion
and check for loose battery cable connections (See
BATTERY MAINTENANCE).
15. Recharge the batteries (Figure 70) after a total of
30 minutes of use or more.

FIG. 70

MONTHLY MAINTENANCE
1. Remove the solution tank filter from underneath the
machine and rinse out the screen (Figure 71).
Make sure the solution tank is empty before
removing filter.

Cylindrical Brush Model

FIG. 72

3. Inspect and clean the recovery tank cover seal
(Figure 73). Replace if damaged.

FIG. 73

4. Lubricate all pivot points and rollers with a water
resistant grease.
5. Lubricate the casters with a water resistant grease
(Figure 74).

FIG. 74

FIG. 71
Nobles Speed Scrub 9002377 REV.00 (08-06)

6. Clean the parking brake clamp with a cleaning
solvent.
7. Check the machine for loose nuts and bolts.
Nobles Speed Scrub (08--06)

Speed Scrub – Maintenance
(Page 11 of 16)

8. Check the machine for leaks.
BATTERY MAINTENANCE (Wet/lead acid batteries)
1. Check battery fluid level frequently to prevent
battery damage. The fluid should be at the level
shown (Figure 75). Add distilled water if low. DO
NOT OVERFILL, the fluid may expand and
overflow when charging.

SQUEEGEE BLADES
When the blades become worn, simply rotate the
blades end-for-end or top-to-bottom to a new wiping
edge. Replace blades when all edges are worn.
The front blades on the 28 in / 700 mm and 32 in /
800mm squeegee assemblies have 12/14 slots on one
edge and 6 slots on the opposite edge (Figure 77). If
making sharp turns with the cylindrical brush models
use the 12/14 slotted edge for maximum water pickup.
6 Slots on
one edge

12/14 Slots on
opposite edge

CORRECT BATTERY FLUID LEVEL:
Before Charging

After Charging

FIG. 77

Replacing Squeegee Blades:
1. Loosen the band clamp and remove the band from
the squeegee assembly (Figure 78).

FIG. 75

WARNING: Fire Or Explosion Hazard.
Batteries Emit Hydrogen Gas. Keep Sparks And
Open Flame Away. Keep Battery Compartment
Open When Charging.
2. Clean the batteries to prevent battery corrosion.
Use a scrub brush with a mixture of baking soda
and water (Figure 76).

FIG. 78

FOR SAFETY: When cleaning batteries, wear
protective gloves and eye protection. Avoid
contact with battery acid.

FIG. 76
18

Nobles Speed Scrub 9002377 REV.00 (08-06)

Speed Scrub – Maintenance
(Page 12 of 16)

2. Replace or rotate the rear blade to a new wiping
edge and replace band (Figure 79).

FaST SYSTEM MAINTENANCE
Every 1000 hours replace the orifice plate and filter
screen located inside the detergent injector assembly.
1. To access the detergent injector assembly, lower
the scrub head and remove the front shroud
(Figure 81)

FIG. 79

3. To change the front blade, remove the band and
loosen the four knobs. Replace or rotate the front
blade to a new wiping edge (Figure 80)
FIG. 81

2. Remove the injector assembly from clamps
(Figure 82).

FIG. 80

MOTOR MAINTENANCE
Contact an Authorized Tennant Service Center for
carbon brush replacement.
Carbon Brush Replacement

Hours

Drive Transaxle Motor
Vacuum Motor

FIG. 82

Unthread the black plastic filter housing and replace
the orifice plate and filter (Figure 83).

750

Disk Brush Motors
Cylindrical Brush Motors

1000

WARNING: Electrical Hazard. Disconnect
Battery Cables Before Servicing Machine.

FIG. 83

Nobles Speed Scrub 9002377 REV.00 (08-06)

Nobles Speed Scrub (08--06)

Speed Scrub – Maintenance
(Page 13 of 16)

JACKING UP MACHINE
Use the designated locations to jack up the machine for
service (Figure 84). Empty the recovery and solution
tank and position the machine on a level before jacking.
FOR SAFETY: When servicing machine, jack
machine up at designated locations only. Use jack
or hoist that will support machine weight.

FIG. 85

STORING MACHINE
1. Charge the batteries before storing machine to
prolong the life of the batteries.
2. Drain and rinse the tanks thoroughly.
FIG. 84

TRANSPORTING MACHINE
When transporting the machine by trailer or truck, be
certain to follow the transporting procedure below:
1. Drain machine tanks.
2. Load the machine using a ramp that can support
the machine weight and person loading it. The
maximum ramp incline should not exceed 11° at a
ramp length of 3.7m (12 ft).
3. Position the front of machine up against the front of
the trailer or truck. Lower the scrub head and
squeegee.
4. Set the parking brake, if equipped, and place a
block behind each wheel to prevent the machine
from rolling.

3. Store the machine in a dry area with the squeegee
and scrub head in the up position.
4. Open the recovery tank cover to promote air
circulation.
ATTENTION: Do not expose machine to rain, store
indoors.
5. If storing machine in freezing temperatures, make
sure to drain machine of all water.
For models equipped with the FaST System, follow
the FaST SYSTEM FREEZE PROTECTION
procedure below.
FaST SYSTEM FREEZE PROTECTION
Valve Coupling #1006205 and 6 in / 15 cm Hose
#63182 are required (Purchased separately).
1. Remove the FaST--PAK carton and connect the
valve coupling and 15 cm hose (purchased parts)
to the supply hose (Figure 86).

5. Secure with tie--down straps as shown (Figure 85).
It may be necessary to install tie-down brackets to
trailer or truck.
FOR SAFETY: When loading/unloading machine
onto/off truck or trailer, use a ramp that can
support the machine weight and person loading it,
do not exceed a 11° ramp incline at a ramp length
of 3.7m (12 ft), use tie--down straps to secure
machine and block machine wheels.

FIG. 86

Nobles Speed Scrub 9002377 REV.00 (08-06)

Speed Scrub – Maintenance
(Page 14 of 16)

2. Disconnect the opposite end of the supply hose
from the injector assembly and drain the supply
hose (Figure 87). To access the injector assembly
remove the front shroud.

7. To drain the anti--freeze, repeat the draining
process above and reconnect the supply hose to
the FaST--PAK carton.

RECOMMENDED STOCK ITEMS
Refer to the Parts List Manual for recommended stock
items. Stock Items are clearly identified with a bullet
preceding the parts description. See example below:

FIG. 87

3. Reconnect the supply hose to injector assembly
and pour a recreational vehicle (RV) anti--freeze
into the supply hose until full (Figure 88).

FIG. 88

4. Operate the FaST system as normal until the
foaming stops. This step could take anywhere from
5--10 minutes.
5. Remove the valve coupling and connect the
storage plug (Figure 89).

FIG. 89

6. Drain the recovery and solution tanks and store
machine.

Nobles Speed Scrub 9002377 REV.00 (08-06)

Nobles Speed Scrub (08--06)

Speed Scrub – Maintenance
(Page 15 of 16)

TROUBLESHOOTING
PROBLEM

CAUSE

SOLUTION

Machine will not operate

Discharged batteries

Charge batteries

Emergency--stop button activated

Turn button clockwise to reset

Faulty battery(s)

Replace battery(s)

Loose battery cable

Tighten loose cable

Tripped main circuit breaker

Reset 10A main circuit breaker

Main fuse blown

Replace 100A main fuse

Faulty key switch

Contact Service Center

Machine fault detected.

See Battery Meter LED Fault Codes

Plug not connected to power supply

Check plug connection

Faulty charger fuse

Replace charger fuse

Faulty power supply cord

Replace cord

Error detected.

See On--board Battery Charger Error Codes

Scrub head is raised off floor

Lower scrub head

Battery meter lockout activated

Recharge batteries

Discharged batteries

Charge batteries

Tripped brush motor circuit breaker

Reset 25A circuit breaker button

Faulty scrub head (up/down) switch

Contact Service Center

Faulty trigger switch(es)

Contact Service Center

Faulty brush motor or wiring

Contact Service Center

Worn carbon brushes

Contact Service Center

Broken or loose belt
(cylindrical brush model)

Replace or tighten belt

Faulty relay switch

Contact Service Center

Parking brake is set

Release parking brake lever

Machine fault detected

See Battery Meter LED Fault Codes

Propel motor fuse blown

Replace 30A fuse

Faulty transaxle motor or wiring

Contact Service Center

Worn carbon brushes

Contact Service Center

Exceeded maximum incline

Avoid steep inclines and reset key

Squeegee is raised off floor

Lower squeegee

Discharged batteries

Charge batteries

Tripped vacuum motor circuit breaker

Reset 25A circuit breaker button

Faulty vacuum motor or wiring

Contact Service Center

Worn carbon brushes

Contact Service Center

Solution tank is empty

Fill solution tank

Clogged solution tank filter

Clean solution tank filter

Discharged batteries

Charge batteries

Clogged solution valve

Remove valve and clean

Solution flow control knob set too low

Adjust solution control flow knob

Loose screw on control knob

Calibrate knob and retighten screw.

On--board battery charger
will not operate

Brush motor(s) will not
operate

Machine will not propel

Vacuum motor will not
operate

Little or no solution flow

Nobles Speed Scrub 9002377 REV.00 (08-06)

Speed Scrub – Maintenance
(Page 16 of 16)

TROUBLESHOOTING - Continued
PROBLEM

CAUSE

SOLUTION

Poor water pickup

Recovery tank is full or excessive foam
buildup

Drain recovery tank

Loose drain hose cap

Tighten cap

Clogged float shut--off screen located in
recovery tank

Clean screen

Clogged squeegee assembly

Clean squeegee assembly

Worn squeegee blades

Replace or rotate squeegee blades

Incorrect Squeegee blade deflection

Adjust Squeegee blade height

Loose vacuum hose connections

Secure hose connections

Clogged vacuum hose

Remove clogged debris

Damaged vacuum hose

Replace vacuum hose

Recovery tank cover not in place

Properly position cover

Damaged recovery tank cover seal

Replace seal

Faulty vacuum motor

Contact Service Center

Low battery charge

Recharge batteries

Debris caught in brush

Remove debris

Worn brushes/pads

Replace brushes/pads

Incorrect brush pressure setting

Adjust pressure setting

Wrong brush/pad type.

Use correct brush/pad

Batteries not fully charged

Fully recharge batteries

Defective batteries

Replace battery

Batteries need maintenance

See BATTERY MAINTENANCE

Faulty battery charger

Repair or replace battery charger

FaST system switch is not turned on

Turn on FaST system switch

FaST--PAK supply hose not connected

Connect supply hose

Clogged FaST--PAK supply hose or connectors

Soak in warm water to unclog

Empty FaST--PAK carton

Replace FaST--PAK carton

Kink in FaST--PAK supply hose

Undo hose kink

Clogged FaST solution system

Contact Service Center

Faulty FaST system on/off switch

Contact Service Center

Faulty pump

Contact Service Center

Clogged solution tank filter

Drain solution tank. Remove solution tank
filter, clean and reinstall

Clogged detergent orifice/filter screen

Replace orifice/filter screen
(See FaST SYSTEM MAINTENANCE)

Clogged FaST solution inlet filter

Contact Service Center

FaST Pump fuse blown

Replace 7.5A fuse

Poor scrubbing
performance

Reduced run time

FaST Model: FaST
System does not operate
or operate correctly

Nobles Speed Scrub 9002377 REV.00 (08-06)

Nobles Speed Scrub (08--06)

Speed Scrub – Electrical Schematic

Nobles Speed Scrub 9002377 REV.00 (08-06)

Speed Scrub – Wiring Harness Detail

MAIN HARNESS

CONTINUED

(Page 1 of 6)

Nobles Speed Scrub 9002377 REV.00 (08-06)

Speed Scrub – Wiring Harness Detail

MAIN HARNESS

(Page 2 of 6)

Nobles Speed Scrub 9002377 REV.00 (08-06)

Speed Scrub – Wiring Harness Detail

Nobles Speed Scrub 9002377 REV.00 (08-06)

MAIN HARNESS

CONTINUED

(Page 3 of 6)

Speed Scrub – Wiring Harness Detail

MAIN HARNESS

(Page 4 of 6)

Nobles Speed Scrub 9002377 REV.00 (08-06)

Speed Scrub – Wiring Harness Detail

CHASSIS HARNESS

(Page 5 of 6)

Nobles Speed Scrub 9002377 REV.00 (08-06)

Speed Scrub – Wiring Harness Detail

FaST HARNESS

(Page 6 of 6)

Nobles Speed Scrub 9002377 REV.00 (08-06)

Speed Scrub –Control Board & BDI Details

CONTROL BOARD

4 3
2 1

2
1

BATTERY
CONNECTIONS

PROPEL MOTOR
CONNECTIONS

SCRUB OUTPUT
CONNECTIONS

PROGRAMMING
CONNECTIONS

14 13 12 11 10

CONTROL
CONNECTIONS

2 4
1 3

BATTERY DISCHARGE INDICATOR
(VIEWED FROM REAR)

Nobles Speed Scrub 9002377 REV.00 (08-06)

Speed Scrub –Control Board & BDI Pin Charts

CONTROL BOARD CONNECTIONS
Name

Pin # Wire #

Color

Active
Voltage

Inactive
Voltage

Input/
Output

Notes

Function/Component Controlled

Battery
Connections

brown

battery (+)

input

Battery positive power supply

13A

black

battery (-)

input

Battery negative power supply

Propel Motor
Connections

yellow

0v to 24v

output

white

0v to 24v

output

Scrub Output
Connections

green

battery (+) battery (+)

output

purple

battery (-)

open

output

see
notes

orange

input

Throttle signal input

brown

output

Throttle 5v reference signal

white

battery (-)

open

output

CR2

yellow

battery (+)

open

input

Key switch input

gray

battery (-)

2.5v

input

Normal mode: wire 48 NOT connected to
Low battery voltage lockout level 13H (20.7v lockout for WET batteries)
select
Special mode: wire 48 connected to 13H
(22.4v lockout for Europe)

yellow

output

Battery (+) supply for input
switches

green

output

Throttle 0v reference signal

white

output

BDI

13G

black

battery (-)

output

see
notes

pink

2.5v

input

Programming
Connections

Control
Connections

see notes

battery (+) battery (+)

see notes

Propel motor power supply
connections
Scrub functions power supply

Forward=4v to 24v, Reverse=0v
Reverse=1.5v to 12v, Forward=0v
Controls CR1 (brush contactor), solution
valve, CR4 (FaST relay), & hour meter

Used only for programming the
control board

Reverse=0v to 2.25v; Fwd=2.75v to 5v;
Neutral=2.25v to 2.75v

Vacuum fan relay
Signal to turn control board ON

Output in series to charger safety,E-stop,&
key switches

Battery Discharge Indicator

Communicates battery & control board
information (up to 10v)

Battery (-) output for various
components

Output to vacuum switch, CR3 actuator
relay, Battery Discharge Indicator, & low
battery voltage lockout select

Vacuum switch

BATTERY DISCHARGE INDICATOR CONNECTIONS
Name

Battery
Discharge
Indicator

Pin # Wire #

1
2
3
4

34
9
13J
13F

Color

Active
Voltage

yellow
white 10v to 24v
black
0v
black
0v
battery (+)

Inactive
Voltage

x
x
0v
0v

Input/
Output

input
input
input
input

Function

Battery (+) supply voltage
Battery status signal
Battery (-) supply voltage
Static drain path

Nobles Speed Scrub 9002377 REV.00 (08-06)

Speed Scrub – BDI Diagnostic Fault Indicators
LED Flashing Codes
1 BAR FLASHING

Very Low Battery
Voltage

The batteries need immediate charging or there is a bad
connection to the batteries. Charge the batteries,or check the
connections to the battery.

2 BARS FLASHING

Low Battery Voltage
(Slowly Flashing @
40Hz)

The batteries need charging or there is a bad connection to the
batteries. Charge the batteries,or check the connections to the
battery.

2 BARS FLASHING

Propel Motor Open
(Quickly Flashing @
200 Hz)

The propel motor has an open connection. Check all the
connections and wires between the motor and the control
board. Test motor for open circuit.
The propel motor has a short circuit. Check all the connections

3 BARS FLASHING

4 BARS FLASHING

5 BARS FLASHING

6 BARS FLASHING

7 BARS FLASHING

8 BARS FLASHING

9 BARS FLASHING

10 BARS FLASHING

Propel Motor Shorted and wires between the motor and the control board. Test motor
for short circuit.

Battery Lockout

The voltage level of the batteries has fallen below the Battery
Lockout Level and the control board is inhibiting certain
machine functions. Charge the batteries.

Not Used

Possible Control
Board Fault

A control board fault is indicated. Make sure that all
connections are secure.

Not Used

High Battery Voltage

An excessive voltage has been applied to the controller. This is
usually caused by a poor battery connection. Check all battery
connections.

Control Board in
Sleep Mode (LED's flash The controller has entered sleep mode. Switch the control
one at a time from left to
right)

system off and then on again.

A throttle fault is indicated. Make sure that the forward and
reverse switches are released before switching on the
(LED's ripple back and forth) machine, or check all connections and wires from the switches
to the control board.

Throttle Displaced

Nobles Speed Scrub 9002377 REV.00 (08-06)

Speed Scrub - Key OFF Power Distribution

(With Standard Off-Board Battery Charger)

CONDITIONS: Key OFF, off-board battery charger NOT CONNECTED to charger plug
6 VDC

1 RED

6 VDC

1 RED

F1
100A

6 VDC

1 RED

CR1

1 RED
42

1 RED

13 BLK

CHARGER
PLUG

F2
30A
v

6 VDC

CONTROL BOARD

+
-

TO CIRCUIT
BREAKER CB1

13 BLK

1
2

TO CIRCUIT
BREAKER CB2

1 2

CR2
10

CR3
1 RED

TO CIRCUIT
BREAKER CB3

TO CIRCUIT
BREAKER CB4

F3
7.5A
1 RED

TO FUSE F4

CR4
28

TO FaST PUMP
MOTOR M6

7
6
5
4
3
2
1

14
13
12
11
10

13 BLK

9
8
13 BLK

54
54

BATTERY
DISCHARGE
INDICATOR
4

Wiring Color Codes

CHARGER
SAFETY
SWITCH

EMERGENCY
STOP
SWITCH

(Unless otherwise marked)
Right Most Digit
of Wire Number

Color of Wire

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

KEY
SWITCH
64

CR3

13 BLK

1 2
3 4

13 BLK

ACTUATOR
RELAY

Tan

0
1

Be cautious when working near Control Board Battery voltage is always present, even with Key OFF

If Charger Plug is connected to battery charger, ALL machine
functions will be disabled when Key Switch is turned ON

= Battery Negative
or Logic Ground
= Battery Positive
or Logic High

Nobles Speed Scrub 9002377 REV.00 (08-06)

Speed Scrub - Key OFF Power Distribution

(With Standard Off-Board Battery Charger)

CONDITIONS: Key OFF, off-board battery charger CONNECTED to charger plug
6 VDC

1 RED

6 VDC

1 RED

F1
100A

6 VDC

1 RED

CR1

1 RED
42

1 RED

13 BLK

CHARGER
PLUG

F2
30A
v

6 VDC

CONTROL BOARD

+
-

TO CIRCUIT
BREAKER CB1

13 BLK

1
2

TO CIRCUIT
BREAKER CB2

1 2

CR2
10

CR3
1 RED

TO CIRCUIT
BREAKER CB3

TO CIRCUIT
BREAKER CB4

F3
7.5A
1 RED

TO FUSE F4

CR4
28

TO FaST PUMP
MOTOR M6

7
6
5
4
3
2
1

14
13
12
11
10

13 BLK

9
8
13 BLK

54
54

CHARGER
SAFETY
SWITCH

BATTERY
DISCHARGE
INDICATOR
4

EMERGENCY
STOP
SWITCH

Wiring Color Codes
(Unless otherwise marked)
Right Most Digit
of Wire Number

Color of Wire

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

KEY
SWITCH
64

CR3

13 BLK

1 2
3 4

13 BLK

ACTUATOR
RELAY

Tan

0
1

Be cautious when working near Control Board Battery voltage is always present, even with Key OFF

If Charger Plug is connected to battery charger, ALL machine
functions will be disabled when Key Switch is turned ON

= Battery Negative
or Logic Ground
= Battery Positive
or Logic High

Nobles Speed Scrub 9002377 REV.00 (08-06)

Speed Scrub - Key OFF Power Distribution

(With Optional On-Board Battery Charger)

CONDITIONS: Key OFF, On-Board battery charger NOT CONNECTED to AC power
RED

1 RED

F1
100A
v

6 VDC

CR1

6 VDC

F2
30A

1 RED

13 BLK

CONTROL BOARD

+
-

TO CIRCUIT
BREAKER CB1

1 RED

6 VDC

13 BLK

1
2

TO CIRCUIT
BREAKER CB2

1 2

CR2
10

TO CIRCUIT
BREAKER CB3
38

CR3
1 RED

TO CIRCUIT
BREAKER CB4

78
58

F3
7.5A
1 RED

TO FUSE F4

CR4
28

TO FaST PUMP
MOTOR M6

7
6
5
4
3
2
1

14
13
12
11
10

13 BLK

9
8
13 BLK

54
54

ON-BOARD
CHARGER

EMERGENCY
STOP
SWITCH

RED

BATTERY
DISCHARGE
INDICATOR

Right Most Digit
of Wire Number

BLACK

KEY
SWITCH
64

CR3

13 BLK

1 2
3 4

13 BLK

Color of Wire

AC POWER
CORD

Tan

0
1

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

NOT CONNECTED TO AC

= Battery Negative
or Logic Ground
= Battery Positive
or Logic High

ACTUATOR
RELAY

Wiring Color Codes
(Unless otherwise marked)

Be cautious when working near Control Board Battery voltage is always present, even with Key OFF

The battery charger uses a normally closed relay to
send a signal to the control board – the relay opens
when the charger is plugged in to AC power

If On-Board Charger is connected to AC
power, ALL machine functions will be
disabled when Key Switch is turned ON
Nobles Speed Scrub 9002377 REV.00 (08-06)

Speed Scrub - Key OFF Power Distribution

(With Optional On-Board Battery Charger)

CONDITIONS: Key OFF, On-Board battery charger CONNECTED to AC power
RED

1 RED

F1
100A
v

6 VDC

CR1

6 VDC

F2
30A

1 RED

13 BLK

CONTROL BOARD

+
-

TO CIRCUIT
BREAKER CB1

1 RED

6 VDC

13 BLK

1
2

TO CIRCUIT
BREAKER CB2

1 2

CR2
10

TO CIRCUIT
BREAKER CB3
38

CR3
1 RED

TO CIRCUIT
BREAKER CB4

78
58

F3
7.5A
1 RED

TO FUSE F4

CR4
28

TO FaST PUMP
MOTOR M6

7
6
5
4
3
2
1

14
13
12
11
10

13 BLK

9
8
13 BLK

54
54

ON-BOARD
CHARGER

BATTERY
DISCHARGE
INDICATOR
4

EMERGENCY
STOP
SWITCH

RED

Right Most Digit
of Wire Number

KEY
SWITCH
64

CR3

13 BLK

1 2
3 4

13 BLK

ACTUATOR
RELAY

Wiring Color Codes
(Unless otherwise marked)

BLACK

Color of Wire

AC POWER
CORD

Tan

0
1

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

CONNECTED TO AC

= Battery Negative
or Logic Ground
= Battery Positive
or Logic High

Nobles Speed Scrub 9002377 REV.00 (08-06)

Be cautious when working near Control Board Battery voltage is always present, even with Key OFF

The battery charger uses a normally closed relay to
send a signal to the control board – the relay opens
when the charger is plugged in to AC power

If On-Board Charger is connected to AC
power, ALL machine functions will be
disabled when Key Switch is turned ON
37

Speed Scrub - Key ON Power Distribution
CONDITIONS: Key ON

The troubleshooting information from this page forward applies to machines
with On-Board or Off-Board Chargers unless otherwise noted

1 RED

6 VDC

1 RED

F1
100A
v

6 VDC

CR1

TO CIRCUIT
BREAKER CB1

TO CIRCUIT
BREAKER CB2

TO CIRCUIT
BREAKER CB3

CR2
1 RED

1 RED

6 VDC

+
-

1 2

CHARGER
SAFETY
SWITCH

F3
7.5A

1 RED

7
6
5
4
3
2
1

KEY
EMERGENCY
SWITCH
STOP
SWITCH

TO CIRCUIT
BREAKER CB4

13 BLK

1
2

1 RED

13 BLK

CONTROL BOARD

13 BLK

CR3

6 VDC

CHARGER
PLUG

F2
30A

1 RED

14
13
12
11
10

13 BLK

9
8
13 BLK

TO FUSE F4
BATTERY
DISCHARGE
INDICATOR

CR4
28

TO FaST PUMP
MOTOR M6

Wiring Color Codes
(Unless otherwise marked)
Right Most Digit
of Wire Number

Color of Wire

Tan

0
1

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White
= Battery Negative
or Logic Ground

CR3

13 BLK

1 2
3 4

13 BLK

ACTUATOR
RELAY

Be cautious when working near Control Board Battery voltage is always present, even with Key OFF

If Charger Plug is connected to battery charger, ALL machine
functions will be disabled when Key Switch is turned ON

= Battery Positive
or Logic High

Nobles Speed Scrub 9002377 REV.00 (08-06)

Speed Scrub – Propel Forward System
CONDITIONS: Key ON, forward propel engaged

1 RED

6 VDC

1 RED

F1
100A
v

6 VDC

+
-

1 2

M4
PROPEL MOTOR

FORWARD

5V REFERENCE

13 BLK

1
2

19
84

13 BLK

CONTROL BOARD

13 BLK

CHARGER
PLUG

F2
30A

1 RED

6 VDC

SIGNAL INPUT

7
6
5
4
3
2
1

14
13
12
11
10

9
8

0V REFERENCE

SPEED LIMITER
POTENTIOMETER
50KΩ

DIRECTION
SWITCH
31

X
RIGHT
TRIGGER
SWITCH
32

Wiring Color Codes

REVERSE

FORWARD

RECOVERY TANK
PROPEL INTERLOCK
SWITCH

(Unless otherwise marked)
Right Most Digit
of Wire Number

Color of Wire

Tan

0
1

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

LEFT
TRIGGER
SWITCH

= Battery Negative
or Logic Ground
= Battery Positive
or Logic High

Nobles Speed Scrub 9002377 REV.00 (08-06)

Only one trigger switch needs to be
closed to propel machine forward

Be cautious when working near Control Board Battery voltage is always present, even with Key OFF

The Propel Motor (M4) is controlled by PWM; A
higher duty cycle will result in higher travel speed

If Charger Plug is connected to battery charger, ALL machine
functions will be disabled when Key Switch is turned ON

Speed Scrub – Propel Reverse System
CONDITIONS: Key ON, reverse propel engaged

1 RED

6 VDC

1 RED

F1
100A
v

6 VDC

+
-

1 2

M4
PROPEL MOTOR

REVERSE

5V REFERENCE

13 BLK

1
2

19
84

13 BLK

CONTROL BOARD

13 BLK

CHARGER
PLUG

F2
30A

1 RED

6 VDC

SIGNAL INPUT

7
6
5
4
3
2
1

14
13
12
11
10

9
8

0V REFERENCE

SPEED LIMITER
POTENTIOMETER
50KΩ

DIRECTION
SWITCH
31

FORWARD

RECOVERY TANK
PROPEL INTERLOCK
SWITCH

RIGHT
TRIGGER
SWITCH
Wiring Color Codes

REVERSE

(Unless otherwise marked)
Right Most Digit
of Wire Number

Color of Wire

Tan

0
1

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White
= Battery Negative
or Logic Ground
= Battery Positive
or Logic High

LEFT
TRIGGER
SWITCH

Be cautious when working near Control Board Battery voltage is always present, even with Key OFF

The Propel Motor (M4) is controlled by PWM; A
higher duty cycle will result in higher travel speed

If Charger Plug is connected to battery charger, ALL machine
functions will be disabled when Key Switch is turned ON

Nobles Speed Scrub 9002377 REV.00 (08-06)

Speed Scrub – Scrub Brushes
CONDITIONS: Key ON, Scrub Head lowered for cleaning, propel engaged

1 RED

6 VDC

1 RED

F1
100A
v

6 VDC

13 BLK

CHARGER
PLUG

F2
30A

1 RED

6 VDC

CONTROL BOARD

+
-

13 BLK

1
2
25

1 2

27
25

SCRUB/TRANSPORT
SWITCH (INTERNAL TO
SCRUB HEAD ACTUATOR)

CB1
25A

7
6
5
4
3
2
1

CR1
BRUSH
CONTACTOR

BRUSH
PRESSURE
GAUGE

RIGHT BRUSH
MOTOR
59

14
13
12
11
10

9
8

13 BLK

CR1
1 RED

CB2
25A

M2
LEFT BRUSH
MOTOR

Wiring Color Codes
(Unless otherwise marked)
Right Most Digit
of Wire Number

Color of Wire

Tan

0
1

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

= Battery Negative
or Logic Ground
= Battery Positive
or Logic High

Nobles Speed Scrub 9002377 REV.00 (08-06)

Be cautious when working near Control Board Battery voltage is always present, even with Key OFF

If Charger Plug is connected to battery charger, ALL machine
functions will be disabled when Key Switch is turned ON

The Scrub/Transport Switch closes when the Scrub
Head Actuator extends (lowers) 2” (50mm) or more

The Brush Pressure Gauge monitors
current on the Right brush motor only

Speed Scrub – Vacuum Fan System
CONDITIONS: Key ON, Squeegee lowered

1 RED

6 VDC

1 RED

F1
100A
v

6 VDC

CONTROL BOARD

+
-

13 BLK

1
2
54

CHARGER
SAFETY
SWITCH

CR2

29
44

7
6
5
4
3
2
1

14
13
12
11
10

9
8

VACUUM FAN
RELAY

CB3
25A

CR2
1 RED

KEY
EMERGENCY
SWITCH
STOP
SWITCH

VACUUM FAN
SWITCH

1 2
54

13 BLK

CHARGER
PLUG

F2
30A

1 RED

13 BLK

VACUUM FAN
MOTOR

Wiring Color Codes
(Unless otherwise marked)
Right Most Digit
of Wire Number

Color of Wire

Tan

0
1

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

Be cautious when working near Control Board Battery voltage is always present, even with Key OFF

If Charger Plug is connected to battery charger, ALL machine
functions will be disabled when Key Switch is turned ON

= Battery Negative
or Logic Ground
= Battery Positive
or Logic High

Nobles Speed Scrub 9002377 REV.00 (08-06)

Speed Scrub – Conventional Solution Valve, Hour Meter
CONDITIONS: Key ON, scrub head lowered for cleaning, propel engaged, conventional scrub selected

6 VDC

1 RED

F1
100A
v

6 VDC

1 RED

BRUSH
CONTACTOR

+
-

FaST
RELAY

6
30

FaST

FaST/
CONVENTIONAL
SWITCH

1 2

7
6
5
4
3
2
1

CONV

CR4

13 BLK

1
2

13 BLK

CONVENTIONAL
SOLUTION
VALVE

CONTROL BOARD

SCRUB/TRANSPORT
SWITCH (INTERNAL TO
SCRUB HEAD ACTUATOR)

6 VDC

13 BLK

CR1

CHARGER
PLUG

F2
30A

1 RED

6 VDC

14
13
12
11
10

9
8

HOUR METER
27

F3
7.5A

1 RED

CR4
18

Wiring Color Codes

13 BLK

FaST PUMP
MOTOR

(Unless otherwise marked)
Right Most Digit
of Wire Number

13 BLK

Color of Wire

Tan

0
1

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

= Battery Negative
or Logic Ground
= Battery Positive
or Logic High

Nobles Speed Scrub 9002377 REV.00 (08-06)

Be cautious when working near Control Board Battery voltage is always present, even with Key OFF

If Charger Plug is connected to battery charger, ALL machine
functions will be disabled when Key Switch is turned ON

The Scrub/Transport Switch closes when the Scrub
Head Actuator extends (lowers) 2” (50mm) or more

The Hour Meter is activated only when the Scrub
Head is lowered, and propel is engaged

Speed Scrub – FaST Pump, Hour Meter
CONDITIONS: Key ON, scrub head lowered for cleaning, propel engaged, FaST scrub selected

6 VDC

1 RED

F1
100A
v

6 VDC

1 RED

BRUSH
CONTACTOR

+
-

FaST
RELAY

6
30

FaST

FaST/
CONVENTIONAL
SWITCH
16

1 2

7
6
5
4
3
2
1

CONV

CR4

13 BLK

1
2

13 BLK

CONVENTIONAL
SOLUTION
VALVE

CONTROL BOARD

SCRUB/TRANSPORT
SWITCH (INTERNAL TO
SCRUB HEAD ACTUATOR)

6 VDC

13 BLK

CR1

CHARGER
PLUG

F2
30A

1 RED

6 VDC

14
13
12
11
10

9
8

HOUR METER
27

F3
7.5A

1 RED

CR4
18

Wiring Color Codes
Color of Wire

Tan

0
1

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White
= Battery Negative
or Logic Ground
= Battery Positive
or Logic High

13 BLK

FaST PUMP
MOTOR

(Unless otherwise marked)
Right Most Digit
of Wire Number

13 BLK

Be cautious when working near Control Board Battery voltage is always present, even with Key OFF

If Charger Plug is connected to battery charger, ALL machine
functions will be disabled when Key Switch is turned ON

The Scrub/Transport Switch closes when the Scrub
Head Actuator extends (lowers) 2” (50mm) or more

The Hour Meter is activated only when the Scrub
Head is lowered, and propel is engaged

Nobles Speed Scrub 9002377 REV.00 (08-06)

Speed Scrub – Scrub Head Actuator LOWER (Extend)
CONDITIONS: Key ON, scrub head lower switch activated

1 RED

6 VDC

1 RED

F1
100A
v

6 VDC

+
-

13 BLK

1
2

SCRUB/TRANSPORT
SWITCH (INTERNAL TO
SCRUB HEAD ACTUATOR)

BRUSH
CONTACTOR

13 BLK

CONTROL BOARD

CR1

13 BLK

CHARGER
PLUG

F2
30A

1 RED

6 VDC

1 2

27
54

7
6
5
4
3
2
1

54
74
74
54

CHARGER
SAFETY
SWITCH

KEY
EMERGENCY
SWITCH
STOP
SWITCH

ACTUATOR
RELAY
64

13 BLK

SHOWN IN OPERATION DURING
LOWERING OF SCRUB HEAD
40

RAISE

RAISE LIMIT
SWITCH

Right Most Digit
of Wire Number

TO FUSE F4

Wiring Color Codes
(Unless otherwise marked)

EXTERNAL
LOWER LIMIT
56 SWITCH
68

13 BLK

LOWER

Tan
Pink

Brown

Orange

Yellow

Green

Scrub Head Actuator Logic Chart
switch

Blue
Purple

Fully Retracted (UP)

Gray

Fully Extended (DOWN)

White

Retracting (RAISING)
Extending (LOWERING)

Nobles Speed Scrub 9002377 REV.00 (08-06)

LOWER LIMIT
SWITCH
13 BLK

= Battery Positive
or Logic High

SCRUB HEAD
ACTUATOR

13 BLK

= Battery Negative
or Logic Ground

INTERNAL
SWITCHES

Color of Wire

0
1

13 BLK

9
8

13 BLK

CB4
10A

CR3
1 RED

CR3

14
13
12
11
10

condition

Scrub/
Transport

Internal Switches
Raise
Lower
Limit
Limit

External Switch
Lower
Limit

OPEN

CLOSED

OPEN

CLOSED
CLOSED
* CLOSED
CLOSED CLOSED
CLOSED
*
* Scrub/Transport Switch closes when actuator is extended 2" (50mm) or more
45

Speed Scrub – Scrub Head Actuator RAISE (Retract)
CONDITIONS: Key ON, scrub head raise switch activated

1 RED

6 VDC

1 RED

F1
100A
v

6 VDC

+
-

13 BLK

1
2

SCRUB/TRANSPORT
SWITCH (INTERNAL TO
SCRUB HEAD ACTUATOR)

BRUSH
CONTACTOR

13 BLK

CONTROL BOARD

CR1

13 BLK

CHARGER
PLUG

F2
30A

1 RED

6 VDC

1 2

27
54

7
6
5
4
3
2
1

54
74
74
4

CHARGER
SAFETY
SWITCH

KEY
EMERGENCY
SWITCH
STOP
SWITCH

ACTUATOR
RELAY
64

13 BLK

SHOWN IN OPERATION DURING
RAISING OF SCRUB HEAD

RAISE

RAISE LIMIT
SWITCH

Right Most Digit
of Wire Number

TO FUSE F4

Wiring Color Codes
(Unless otherwise marked)

LOWER

Tan

0
1

Pink

Brown

Orange

Yellow

Green

SCRUB HEAD
ACTUATOR

LOWER LIMIT
SWITCH

13 BLK

Scrub Head Actuator Logic Chart
switch

Blue

Purple

Fully Retracted (UP)

Gray

Fully Extended (DOWN)

White

Retracting (RAISING)
Extending (LOWERING)

= Battery Positive
or Logic High

INTERNAL
SWITCHES

Color of Wire

= Battery Negative
or Logic Ground

EXTERNAL
LOWER LIMIT
SWITCH

13 BLK

9
8

13 BLK

CB4
10A

CR3
1 RED

CR3

14
13
12
11
10

condition

Scrub/
Transport

Internal Switches
Raise
Lower
Limit
Limit

External Switch
Lower
Limit

OPEN

CLOSED

OPEN

CLOSED
CLOSED
* CLOSED
CLOSED CLOSED
CLOSED
*
* Scrub/Transport Switch closes when actuator is extended 2" (50mm) or more
Nobles Speed Scrub 9002377 REV.00 (08-06)

Speed Scrub – Wand Pump
CONDITIONS: Key ON, wand pump switch ON

1 RED

6 VDC

1 RED

F1
100A
v

6 VDC

13 BLK

CHARGER
PLUG

F2
30A

1 RED

CONTROL BOARD

+
-

13 BLK

1
2
1 2
54
54
74
74
54

CHARGER
SAFETY
SWITCH

KEY
EMERGENCY
SWITCH
STOP
SWITCH

ACTUATOR
RELAY
64

38
(Unless otherwise marked)
Right Most Digit
of Wire Number

13 BLK

9
8

13 BLK

M7
WAND PUMP
SWITCH

Wiring Color Codes

14
13
12
11
10

F4
7.5A

CR3
1 RED

CR3

7
6
5
4
3
2
1

WAND PUMP
MOTOR

TO CIRCUIT
BREAKER CB4

Color of Wire

Tan

0
1

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

Be cautious when working near Control Board Battery voltage is always present, even with Key OFF

If Charger Plug is connected to battery charger, ALL machine
functions will be disabled when Key Switch is turned ON

= Battery Negative
or Logic Ground
= Battery Positive
or Logic High

Nobles Speed Scrub 9002377 REV.00 (08-06)

Source Exif Data:

File Type                       : PDF
File Type Extension             : pdf
MIME Type                       : application/pdf
PDF Version                     : 1.6
Linearized                      : No
Has XFA                         : No
XMP Toolkit                     : Adobe XMP Core 5.5-c021 79.153613, 2013/07/11-05:21:54
Manual Type                     : Service Manual
Format                          : application/pdf
Site Brand                      : nobles
Is Purchasable                  : true
Region                          : am
Doc Status                      : Active
Modified                        : 2016:10:17 18:10:07.338-05:00
Sales Channel                   : Commercial
Category                        : manual
Power Source                    : Battery
Share With Recon Machines       : true
Document Number                 : 9002377
Brand                           : NOB
Security                        : Secure
Creator                         : Steve Floyd
Marketing Channel               : DST, SLS, SRV, EMP, DIR, KSA, SSP
Description                     : Speed Scrub 24-32 Service Manual
Language                        : en, all
Title                           : Speed Scrub 24-32 Service Manual
Num Pages                       : 51
Extracted                       : 2016:10:17 18:08:15.989-05:00
Author                          : Steve Floyd
Sha 1                           : 091638764b33161f53bd330ea2b60f004c9a304e
Size                            : 3717987
Creator Tool                    : PScript5.dll Version 5.2.2
Metadata Date                   : 2015:05:27 11:24:24.000-05:00
Modify Date                     : 2015:05:27 11:24:24.000-05:00
Create Date                     : 2006:07:30 20:11:27.000-05:00
Document ID                     : uuid:e9f8e8d4-6425-482c-876c-793e863f33aa
Instance ID                     : uuid:705aab1e-7dfc-4c02-ad67-2b9a68626ef8
Producer                        : Acrobat Distiller 7.0.5 (Windows)
Tags                            : product-category-tag:nobles/en_us/1/machines/scrubbers/scrubberswalkbehind, product-tag:tennant/en_us/1/machines/scrubbers/M-SS5
Page Layout                     : SinglePage
Page Mode                       : UseOutlines
Page Count                      : 51
Subject                         : Speed Scrub 24-32 Service Manual

EXIF Metadata provided by EXIF.tools

Speed Scrub 24 32 Service Manual Nobles Ss5 Walk Behind Floor Scrubber

Navigation menu

Versions of this User Manual:

Views

Navigation