Nobles SPEED SCRUB User manual

®
9002370
Rev. 01 (09-2006)
AUTOMATIC SCRUBBER
*9002370*
The Safe Scrubbing Alternativer
®
Quick- Train
t Controls
www.nobles.com
OPERATOR MANUAL
SPEED SCRUB

OPERATION
2Nobles Speed Scrub (08--06)
This manual is furnished with each new model.
It provides necessary operation and maintenance
instructions.
Read this manual completely and understand the
machine before operating or servicing it.
A complete illustrated Parts Manual is also furnished
with each new model. Use the Parts Manual to order
replacement parts. To ensure prompt delivery, follow
the “HOW TO ORDER PARTS” instructions printed in
the Parts Manual.
This machine will provide excellent service. However,
the best results will be obtained at minimum costs if:
SThe machine is operated with reasonable care.
SThe machine is maintained regularly - per the
machine maintenance instructions provided.
SThe machine is maintained with manufacturer
supplied or equivalent parts.
PROTECT THE ENVIRONMENT
Please dispose of packaging materials,
old machine components such as
batteries, hazardous fluids such as
antifreeze and oil, in an
environmentally safe way according to
local waste disposal regulations.
Always remember to recycle.
TENNANT Company
PO Box 1452
Minneapolis, MN 55440
Phone: [phone] or (763) 513--2850
www.nobles.com
FaST--PAK is a registered United States trademark of Tennant Company.
Specifications and parts are subject to change without notice.
Copyright E2006 TENNANT COMPANY, Printed in U.S.A.
All rights reserved.
MACHINE DATA
IMPORTANT: To ensure full warranty protection, fill out
the attached MACHINE INSTALLATION / WARRANTY
REPORT REPLY CARD and return to Tennant within
30 days of purchase.
Please fill out at time of installation
for future reference.
Model No. --
Serial No. --
Machine Options --
Sales Rep. --
Sales Rep. phone no. --
Customer Number --
Installation Date --

OPERATION
Nobles Speed Scrub (08--06) 3
TABLE OF CONTENTS
SAFETY PRECAUTIONS 4....................
SAFETY LABELS 5...........................
MACHINE COMPONENTS 6...................
CONTROL PANEL COMPONENTS 7...........
MACHINE INSTALLATION 8...................
UNCRATING MACHINE 8..................
INSTALLING BATTERIES 8................
HOW THE MACHINE WORKS 9...............
BRUSH AND PAD INFORMATION 9............
MACHINE SETUP 9..........................
ATTACHING SQUEEGEE ASSEMBLY 9.....
INSTALLING BRUSHES/PADS 10............
INSTALLING FaST--PAK CARTON 11.........
FILLING SOLUTION TANK 11...............
ADJUSTING CONTROL CONSOLE HEIGHT 12
MACHINE OPERATION 12.....................
PRE--OPERATION CHECKS 12..............
STARTING THE MACHINE 12...............
EMERGENCY STOPPING 14................
WHILE OPERATING MACHINE 14...........
BATTERY METER 14.......................
HOUR METER 14..........................
CIRCUIT BREAKERS / FUSES 15............
OFF--AISLE WAND 15......................
DRAINING AND CLEANING TANKS 16..........
DRAINING RECOVERY TANK 16............
DRAINING SOLUTION TANK 17.............
CHARGING BATTERIES 17....................
BATTERY CHARGER SPECIFICATIONS 17...
ON--BOARD BATTERY CHARGER
SETTINGS 17.............................
USING THE ON--BOARD BATTERY
CHARGER 18.............................
ON--BOARD BATTERY CHARGER
ERROR CODES 19........................
USING AN OFF--BOARD BATTERY
CHARGER 19.............................
ADJUSTING SCRUB HEAD BRUSHES 20.......
DISK MODEL 20...........................
CYLINDRICAL BRUSH MODEL 20...........
MACHINE MAINTENANCE 22..................
DAILY MAINTENANCE 22...................
MONTHLY MAINTENANCE 24...............
BATTERY MAINTENANCE 25...............
SQUEEGEE BLADES 25....................
MOTOR MAINTENANCE 26.................
FaST SYSTEM MAINTENANCE 26...........
JACKING UP MACHINE 27.....................
TRANSPORTING MACHINE 27.................
STORING MACHINE 27........................
FaST SYSTEM FREEZE PROTECTION 27....
RECOMMENDED STOCK ITEMS 28.............
TROUBLESHOOTING 29
.......................
BATTERY METER LED FAULT CODES 31.......
MACHINE SPECIFICATIONS 32................
MACHINE DIMENSIONS 33....................

OPERATION
4Nobles Speed Scrub (08--06)
SAFETY PRECAUTIONS
This machine is intended for industrial and
commercial use. It is designed exclusively to scrub
hard floors in an indoor environment and is not
constructed for any other use. Only use
recommended pads, brushes and commercially
approved floor cleaners intended for machine
application.
The following warning alert symbol and the “FOR
SAFETY” heading are used throughout this manual as
indicated in their description:
WARNING: To warn of hazards or unsafe
practices which could result in severe personal
injury or death.
FOR SAFETY: To identify actions which must be
followed for safe operation of equipment.
The following safety precautions signal potentially
dangerous conditions to the operator or
equipment. All operators must read, understand
and practice them.
WARNING: Fire Or Explosion Hazard
-- Never Use Flammable Liquids Or Operate
Machine In Or Near Flammable Liquids, Vapors
Or Combustible Dusts.
This machine is not equipped with explosion proof
motors. The electric motors will spark upon start
up and during operation which could cause a flash
fire or explosion if machine is used in an area
where flammable vapors/liquids or combustible
dusts are present.
-- Do Not Pick Up Flammable Materials Or
Reactive Metals.
-- Batteries Emit Hydrogen Gas. Keep Sparks And
Open Flame Away. Keep Battery Compartment
Open When Charging.
WARNING: Electrical Hazard
-- Disconnect Battery Cables and Charger Plug
Before Servicing Machine.
-- Do Not Charge Batteries with Damaged Power
Supply Cord. Do Not Modify Plug.
If the charger supply cord is damaged or broken, it
must be replaced by the manufacturer or its
service agent or a similarly qualified person in
order to avoid a hazard.
WARNING: Spinning Brush. Keep Hands
Away. Turn Off Power Before Working On Machine.
FOR SAFETY:
1. Do not operate machine:
-- With flammable liquids or near flammable
vapors as an explosion or flash fire may
occur.
-- Unless trained and authorized.
-- Unless operator manual is read and
understood.
-- If not in proper operating condition.
2. Before starting machine:
-- Make sure all safety devices are in place
and operate properly.
3. When using machine:
-- Go slow on inclines and slippery surfaces.
-- Wear non--slip shoes.
-- Reduce speed when turning.
-- Report machine damage or faulty operation
immediately.
-- Never allow children to play on or around.
-- Follow mixing and handling instructions on
chemical containers.
-- Do not operate on inclines that exceed 5%
(3°).
4. Before leaving or servicing machine:
-- Stop on level surface.
-- Turn off machine.
-- Set parking brake, if equipped.
-- Remove key.
5. When servicing machine:
-- Avoid moving parts. Do not wear loose
jackets, shirts, or sleeves.
-- Disconnect battery cables and charger plug
before working on machine.
-- Wear protective gloves and eye protection
when handling batteries or battery cables.
-- Avoid contact with battery acid.
-- Do not power spray or hose off machine.
Electrical malfunction may occur.
-- Jack machine up at designated locations
only (See JACKING UP MACHINE).
-- Use hoist or jack that will support machine
weight.
-- Use manufacturer supplied or approved
replacement parts.
-- All repairs must be performed by a
qualified service person.
-- Do not modify the machine from its original
design.

OPERATION
Nobles Speed Scrub (08--06) 5
6. When loading/unloading machine onto/off
truck or trailer:
-- Drain tanks before loading.
-- 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).
-- Turn machine off.
-- Put scrub head in the lowered position.
-- Block machine wheels.
-- Use tie--down straps to secure machine.
-- Set parking brake, if equipped.
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.

OPERATION
6Nobles Speed Scrub (08--06)
MACHINE COMPONENTS
1
2
89
6
5
10
4
13
25
14
15
16
20
17
18
23
24
26
27
22
12
7
11
19
21
3
28
1. Adjustable Control Console
2. Control Panel
3. Emergency Stop Button (option)
4. Recovery Tank Drain Hose
5. On--board Battery Charger
6. Squeegee Lift Lever
7. Solution Flow Control Knob
8. Squeegee Vacuum Hose
9. Squeegee Assembly
10. Wall Rollers
11. Solution Tank Level/Drain Hose
12. Rear Fill Port
13. Recovery Tank Support Stand
14. Circuit Breaker Panel
15. FaST--PAK Carton Compartment
16. Batteries
17. Off--Aisle Wand Solution Hose Coupler
18. Recovery Tank
19. Recovery Tank Cover
20. Cup Holders
21. Solution Tank
22. Front Fill Port
23. Disk Scrub Head
24. Pad Release Plunger
25. Pad Driver Window
26. Scrub Head Skirt
27. Parking Brake (option)
28. Cylindrical Brush Scrub Head

OPERATION
Nobles Speed Scrub (08--06) 7
CONTROL PANEL COMPONENTS
6
7
8
911
14
2
33
10
5
1. Battery Meter
2. Reverse Trigger
3. Start Triggers
4. Brush Pressure Meter
5. Control Console Height Adjustment Lever
6. Speed Control Knob
7. Brush Pressure Switch
8. Off--Aisle Wand on/off Switch (option)
9. FaST System on/off Switch (option)
10. Main Power on/off Key Switch
11. Hour Meter

OPERATION
8Nobles Speed Scrub (08--06)
MACHINE INSTALLATION
UNCRATING MACHINE
1. Carefully check the shipping crate for signs of
damage. Report damage at once to carrier.
2. Check the contents list. Contact distributor for
missing items.
Contents:
S4--6 V Batteries--Optional
S3--Battery Cable Jumpers
SBattery Tray
S1--FaST--PAK 365 Concentrate--Optional
SSqueegee Assembly
S2--Pad drivers (Disk Model)
S2--Brushes (Cylindrical Brush Model)
3. To uncrate your machine, remove the shipping
hardware and straps that secure the machine to
the pallet. Carefully back machine down ramp.
ATTENTION: Do not roll machine off pallet unless a
ramp is used, machine damage may occur.
ATTENTION: To prevent possible machine damage,
install batteries after removing machine from
shipping pallet.
FIRST TIME USE (FaST Model): The FaST system is
protected against freezing during shipment. Before
scrubbing, you must operate the FaST system for 10
minutes to disperse the anti--freeze solution.
Dispose the anti--freeze solution according to your local
disposal ordinance.
INSTALLING BATTERIES
WARNING: Fire Or Explosion Hazard.
Batteries Emit Hydrogen Gas. Keep Sparks And
Open Flame Away. Keep Battery Hood Open When
Charging.
FOR SAFETY: When installing batteries, wear
protective gloves and eye protection. Avoid
contact with battery acid.
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. 1
3. Connect the battery cables to the battery posts as
shown (Figure 2), RED TO POSITIVE (+) and
BLACK TO NEGATIVE (--).
235 A/20Ah
Machine
Front
RED
BLACK
FIG. 2
IMPORTANT: If your machine is equipped with the
on--board battery charger, make sure that the
charger is properly set for your battery type before
charging (See ON--BOARD CHARGER SETTINGS).

OPERATION
Nobles Speed Scrub (08--06) 9
HOW THE MACHINE WORKS
Conventional Scrubbing:
Water and detergent from the solution tank flow to the
floor through a solution valve. The brushes use the
detergent and water to scrub the floor clean. As the
machine moves forward, the squeegee wipes the dirty
solution from the floor into the recovery tank.
Foam Scrubbing (FaST Model):
(FaST-- Foam activated Scrubbing Technology)
Unlike conventional scrubbing, the FaST system injects
the FaST--PAK concentrate formula with a small
amount of water and air onto the floor. The mixture
creates a large volume of expanded wet foam for the
brush to scrub the floor clean. As the machine moves
forward, the foam collapses and the squeegee
recovers the dirty solution into the recovery tank
leaving the floor clean, dry and slip free.
BRUSH AND PAD INFORMATION
For best cleaning results use the appropriate brush
type for your cleaning application. Refer to the Parts
manual for part number information.
Polypropylene Bristle Scrub Brush (Black) --
This general purpose polypropylene bristle scrub brush
is used for scrubbing lightly compacted soilage. This
brush works well for maintaining concrete, wood and
grouted tile floors.
Soft Nylon Bristle Scrub Brush (White) --
Recommended for cleaning coated floors without
removing finish. Cleans without scuffing.
Super Abrasive Bristle Scrub Brush (Gray) --
Nylon fiber impregnated with abrasive grit to remove
stains and soilage. Strong action on any surface.
Performs well on buildup, grease, or tire marks.
Polishing Pad (White) --
Used to maintain highly polished or burnished floors.
Buffing Pad (Red) -- Used for light duty scrubbing
without removing floor finish.
Scrubbing Pad (Blue) -- Used for medium to
heavy--duty scrubbing. Removes dirt, spills, and scuffs
and leaves surface clean and ready for recoating.
Stripping Pad (Brown) -- Used for stripping of floor
finish to prepare the floor for recoating.
Heavy Duty Stripping Pad (Black) -- Used for
aggressive stripping of heavy finishes/sealers, or very
heavy duty scrubbing.
MACHINE SETUP
ATTACHING SQUEEGEE ASSEMBLY
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).
FIG. 3
3. Mount the squeegee assembly to the squeegee
pivot bracket and secure with knobs (Figure 4).
FIG. 4
4. Connect the vacuum hose to the squeegee
assembly. Loop the hose as shown using the hose
clip provided (Figure 5).
FIG. 5

OPERATION
10 Nobles Speed Scrub (08--06)
5. Check the squeegee blades for proper deflection.
The blades should deflect as shown (Figure 6).
FIG. 6
6. To adjust the blade deflection, place the squeegee
assembly on a level surface and adjust the casters
as shown (Figure 7).
2mm
1/16”
FIG. 7
INSTALLING BRUSHES/PADS
FOR SAFETY: Before installing brushes or pad
drivers, stop machine on level surface, remove key
and set parking brake if equipped.
Disk Model:
1. Raise scrub head off the floor and remove key.
2. Attach the pad to the pad driver before installing
the driver. Secure pad with centerlock (Figure 8).
FIG. 8
3. Align the pad driver under the motor hub and push
it upward to engage (Figure 9).
FIG. 9
4. To remove the pad driver, raise the scrub head and
push the pad release plunger downward
(Figure 10).
FIG. 10
5. Check the scrub head to ensure that it is properly
adjusted (See ADJUSTING SCRUB HEAD
BRUSHES).
Cylindrical Brush Model:
1. Raise scrub head off the floor and remove key.
2. Remove idler plate from scrub head by pressing
the spring tab downward (Figure 11).
FIG. 11
3. Attach idler plate to the brush end that has the
double row of bristles (Figure 12). Install brush.

OPERATION
Nobles Speed Scrub (08--06) 11
Double row of
bristles
FIG. 12
4. Check the brushes to ensure they are properly
adjusted (See ADJUSTING SCRUB HEAD
BRUSHES).
INSTALLING FaST--PAK CARTON (FaST Model)
ATTENTION: The FaST--PAK Concentrate Formula
is specifically designed for the FaST system.
NEVER use a substitute. Machine damage may
result.
1. Pull out the hose connector from the FaST--PAK
carton and remove cap (Figure 13).
FIG. 13
2. Open the battery compartment. Connect the
FaST--PAK carton to the supply hose and place
carton in compartment (Figure 14). Make sure the
hose does not get pinched.
FIG. 14
3. When the supply hose is not in use, connect the
storage plug to prevent the FaST system from
drying out and clogging up the hose. (Figure 15).
FIG. 15
FILLING SOLUTION TANK
Using a hose or bucket, fill the solution tank to the
“MAX 85L” mark (Figure 16).
For FaST Scrubbing: Use cool clean water only (less
than 70°F/21°C). Do not add any conventional floor
cleaning detergents, FaST system failure may result.
For Conventional Scrubbing: Use hot water (140°F/
60°C maximum). Pour a recommended cleaning
detergent into the solution tank according to mixing
instructions on the container.
FIG. 16
ATTENTION: For Conventional Scrubbing, only use
commercially approved cleaning detergents.
Machine damage due to improper detergent usage
will void the manufacturer’s warranty.
WARNING: Fire or Explosion Hazard.
Never Use Flammable Liquids.

OPERATION
12 Nobles Speed Scrub (08--06)
ADJUSTING CONTROL CONSOLE HEIGHT
Pull the control console height adjustment lever and lift
or lower the console to a comfortable operating height.
Release lever to lock in position (Figure 17).
FIG. 17
MACHINE OPERATION
FOR SAFETY: Do not operate machine, unless
operator manual is read and understood.
WARNING: Fire Or Explosion Hazard. Never
Operate Machine In Or Near Flammable Liquids,
Vapors Or Combustible Dusts.
PRE--OPERATION CHECKS
-Sweep area.
-Check the battery meter.
-Check the brushes/pads for wear.
-Check the squeegee blades for wear and proper
adjustment.
-Make sure the recovery tank is empty and the float
shut--off screen is installed and clean.
-Check the scrub head skirt for wear.
-Foam Scrubbing (FaST model): Check the
FaST--PAK concentrate level.
-Foam Scrubbing (FaST model): Make sure the
solution tank is filled with cool clean water only.
-Foam Scrubbing (FaST model): Ensure that all
conventional cleaning agents are drained and
rinsed from solution tank.
STARTING THE MACHINE
1. Release the parking brake if equipped (Figure 18).
2. Turn the key to the on ( I ) position (Figure 18).
FIG. 18
3. To foam scrub (FaST model), press the FaST
system switch to the on ( I ) position (Figure 19).
IMPORTANT: Do not activate the FaST system when
conventional scrubbing. The conventional cleaning
detergents/restorers in the solution tank may cause
failure to the FaST injection system. Drain, rinse and
refill the solution tank with cool clean water before
operating the FaST system.
FIG. 19
4. Lower the squeegee assembly to the floor by
lowering the squeegee lift lever (Figure 20).
FIG. 20

OPERATION
Nobles Speed Scrub (08--06) 13
5. Lower the scrub head to the floor by pressing the
brush pressure button (Figure 21).
FIG. 21
6. Pull the triggers to begin scrubbing (Figure 22). To
reverse the machine, simply pull the reverse
trigger. Raise squeegee when reversing machine.
FIG. 22
7. Adjust the speed control knob to a desired
scrubbing speed (Figure 23).
NOTE: 148--197 feet / 45--60 meters per minute is the
recommended scrubbing speed.
FIG. 23
8. Check the brush pressure meter reading and adjust
the pressure if needed (Figure 24). Do not operate
the machine in the red zone, floor damage or brush
motor overload may result.
FIG. 24
9. For conventional scrubbing, adjust the solution flow
control knob to a desired flow rate (Figure 25).
NOTE: When foam scrubbing (FaST), the solution flow
rate is fixed and requires no adjustment.
FIG. 25
10. To stop scrubbing, release the triggers, raise the
scrub head and squeegee and turn the key to the
off position.

OPERATION
14 Nobles Speed Scrub (08--06)
EMERGENCY STOPPING
Strike the emergency stop button, if equipped, in the
event of an emergency (Figure 26). This button shuts
off all power to machine. To regain power, turn the
button clockwise.
FIG. 26
WHILE OPERATING MACHINE
WARNING: Fire Or Explosion Hazard. Do Not
Pick Up Flammable Materials Or Reactive Metals.
1. Overlap each scrub path by 2 in / 5 cm.
2. Keep the machine moving to prevent damage to
floor finish.
3. Do not operate the machine on inclines that exceed
5% (3°).
4. Conventional scrubbing: Pour a commercially
approved foam control solution into the recovery
tank if excessive foam appears.
ATTENTION: Do not allow foam to enter the float
shut-off screen located in the recovery tank,
vacuum motor damage will result. Foam will not
activate the float shut-off screen.
5. For heavily soiled areas, use the double scrubbing
method. First scrub the area with the squeegee up,
let solution set for 3--5 minutes, then scrub the area
a second time with squeegee down.
6. When leaving the machine unattended, remove the
key and set the parking brake, if equipped.
7. If the machine detects a fault, the battery meter will
blink a fault code (See BATTERY METER LED
FAULT CODES).
BATTERY METER
The battery meter displays the charge level of the
batteries (Figure 27). When the batteries are fully
charged, all indicator lights will glow. As the batteries
discharge, the indicator lights will begin to go out from
right to left.
When the discharge level reaches the first red light
(Figure 27), stop scrubbing and recharge the batteries.
If you continue to operate the machine beyond the first
red light, the scrubbing function will automatically shut
off when the last red light begins to blink. This protects
the batteries from total discharge. Drive the machine to
the charging area and recharge the batteries
immediately.
NOTE: The battery meter will also display machine
fault codes. If a fault is detected the LED bars will flash
specific fault codes (See BATTERY METER LED
FAULT CODES).
Stop scrubbing and recharge batteries
FIG. 27
HOUR METER
The hour meter records the number of total hours the
brush motors have been powered on. Use the hour
meter to determine when to perform recommended
maintenance procedures and to record service history
(Figure 29). See MACHINE MAINTENANCE.
FIG. 28

OPERATION
Nobles Speed Scrub (08--06) 15
CIRCUIT BREAKERS / FUSES
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.
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)
ABCD
FIG. 29
OFF--AISLE WAND
If your machine is equipped with the off--aisle wand
option, this allows you to scrub areas where the
machine is unable to reach.
Preparing Machine for Off--Aisle Wand Scrubbing:
1. Park the machine on a level surface, turn key off
and set parking brake if equipped.
2. Connect the solution hose to the coupler at the
lower right side of machine (Figure 30).
FIG. 30
3. Using the hose adapter, connect the squeegee
hose to the wand hose (Figure 31).
FIG. 31
4. Attach the off--aisle wand to the hoses (Figure 32).
FIG. 32

OPERATION
16 Nobles Speed Scrub (08--06)
Operating the Off--Aisle Wand:
1. Turn the key and wand switch to the on ( I )
position (Figure 33). The FaST system switch is
disabled when operating the wand.
FIG. 33
2. Lower the squeegee to activate the vacuum motor
(Figure 34).
FIG. 34
3. Squeeze trigger to activate solution. Use brush for
scrubbing and squeegee for pickup (Figure 35).
FIG. 35
4. After scrubbing, turn off the wand switch and
squeeze the trigger for five seconds to relieve the
water pressure before disconnecting the solution
hose.
WARNING: Fire or Explosion Hazard. Do Not
Pick Up Flammable Materials Or Reactive Metals.
DRAINING AND CLEANING TANKS
After each use, the tanks should be drained and cleaned.
DRAINING RECOVERY TANK
1. Transport machine to disposal area and turn key
switch off.
2. While holding the drain hose upward, remove the
cap and lower hose to drain (Figure 36).
FIG. 36
3. Remove the recovery tank cover and rinse out the
tank (Figure 37).
FIG. 37
4. Clean the float shut-off screen located inside the
recovery tank (Figure 38).
FIG. 38

OPERATION
Nobles Speed Scrub (08--06) 17
DRAINING SOLUTION TANK
1. To drain remaining water from the solution tank,
pull the solution tank level hose off the hose fitting
(Figure 39).
FIG. 39
2. On a monthly basis, remove the solution tank filter
from underneath the machine and rinse out the
screen (Figure 40). Make sure the solution tank is
empty before removing filter.
FIG. 40
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.
BATTERY CHARGER SPECIFICATIONS
SCHARGER TYPE:
-- FOR SEALED (Gel) BATTERIES
-- FOR WET (Lead acid) BATTERIES
SOUTPUT VOLTAGE - 24 VOLTS
SOUTPUT CURRENT - 20 AMPS
SAUTOMATIC SHUTOFF CIRCUIT
SFOR DEEP CYCLE BATTERY CHARGING
ON--BOARD BATTERY CHARGER SETTINGS
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
FIG. 41

OPERATION
18 Nobles Speed Scrub (08--06)
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.
WET “Acd” BATTERY
SEALED “GEL” 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.
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. 43
5. Connect the charger’s AC power supply cord into a
properly grounded receptacle (Figure 44).
NOTE: The machine will not operate when charging.
FIG. 44
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.
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.
If the charger detects a problem, the charger will
display an error code (See ON--BOARD BATTERY
CHARGER ERROR CODES).

OPERATION
Nobles Speed Scrub (08--06) 19
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
temperature.
Check if the charger vents are obstructed.
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 Service Center.
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. 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).
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.

OPERATION
20 Nobles Speed Scrub (08--06)
ADJUSTING SCRUB HEAD BRUSHES
To ensure optimum scrubbing performance periodically
check the scrub head for proper adjustment.
FOR SAFETY: Before adjusting scrub head, stop
machine on level surface, remove key and set
parking brake if equipped.
DISK MODEL
Tools required: Measuring device, 1--1/16 in / 27 mm
wrench and 15/16 in / 24mm wrench
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. 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).
Lock
Nut
FIG. 49
CYLINDRICAL BRUSH MODEL
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).
CORRECT BRUSH PATTERN
INCORRECT BRUSH PATTERNS
Even
Pattern
Tapered
Pattern
Uneven
Pattern
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. 51
3. Lower the scrub head to the floor and apply
maximum brush pressure.
4. Shut off the solution flow.
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.