Nobles SPEED SCRUB Operating and installation instructions

SERVICE INFORMATION MANUAL
®
9002377
Rev. 01 (09-2006)
AUTOMATIC SCRUBBER
*9002377*
The Safe Scrubbing Alternativer
®
Quick- Train
t Controls
www.nobles.com
SPEED SCRUB

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: [phone] 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 E2006 TENNANT Company, Printed in U.S.A.
ii
Nobles Speed Scrub 9002377 REV.00 (08-06)

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 Batter
y
Char
g
er Settin
g
s……………………………………… 9
Usin
g
the On-Board Batter
y
Char
g
er……………………………………
…
10
On-Board Batter
y
Char
g
er Error Codes…………………………………
…
11
Usin
g
an Off-Board Batter
y
Char
g
er……………………………………
…
11
ADJUSTING SCRUB HEAD BRUSHES………………………………………
…
12
Disk Brush Model………………...………………………………………. 12
C
y
lindrical Brush Model……………………………………..……………
…
12
Ad
j
ustin
g
an Uneven Brush Pattern………………………………
…
13
Ad
j
ustin
g
a Ta
p
ered Brush Pattern………………………………
…
13
MACHINE MAINTENANCE……………………………………………..………
…
14
Dail
y
Maintenance…………………………………………..……………
…
14
Monthl
y
Maintenance………………………………….…………………
…
16
Batter
y
Maintenance……………...………..……………………………… 17
S
q
uee
g
ee Blades……………………….…………………...……………
…
17
Motor Maintenance……………………………………….………………
…
18
FaST S
y
stem Maintenance……………………………………….………
…
18
JACKING UP MACHINE……………………….……...…………………………
…
19
TRANSPORTING MACHINE…………………….……………...………………
…
19
STORING MACHINE………………………………………...…..………………
…
19
FaST S
y
stem Freeze Protection……………..……………………...……19
RECOMMENDED STOCK ITEMS……………..……………….………………
…
20
BASIC TROUBLESHOOTING……………………….…………………………
…
21
ELECTRICAL
Electrical Schematic…………………………...…..…………………..…………
…
23
Wirin
g
Harness Detail………………………...………………..…………………
…
24
Control Board & BDI Details……………………………………………………
…
30
Control Board & BDI Pin Charts…………………………………………………
…
31
BDI Dia
g
nostic Fault Indicators…………………………………………………
…
32
Electrical S
y
mbols & Terms…………………………...……………..…………
…
33
Ke
y
OFF Power Distribution
(
Off-Board Char
g
er Disconnected
)
……………
…
34
Ke
y
OFF Power Distribution
(
Off-Board Char
g
er Connected
)
………………
…
35
Ke
y
OFF Power Distribution
(
On-Board Char
g
er Disconnected
)
……………
…
36
Ke
y
OFF Power Distribution
(
On-Board Char
g
er Connected
)
………………
…
37
Ke
y
ON Power Distribution………………….………….………………………
…
38
Pro
p
el Forward S
y
stem…………………………...………………………………39
Propel Reverse System………………………………………………………….. 40
Scrub Brushes……………………...…………………………..…………………
…
41
Vacuum Fan S
y
stem…………………………..………………..………………..
…
42
Conventional Solution Solenoid Valve & Hour Meter…………………………
…
43
FaST Pum
p
& Hour Meter………………………………………………………
…
44
Scrub Head Actuator LOWER
(
Extend
)
……………………………….………
…
45
Scrub Head Actuator RAISE
(
Retract
)
…………………………………………
…
46
Wand Pum
p
…………………………….…………………………………………
…
47
Speed Scrub Service Information Manual
Table of Contents
Nobles Speed Scrub 9002377 REV.00 (08-06)
iii

Speed Scrub Service Information Manual
BEFORE CONDUCTING TESTS:
zRead and Follow ALL Safety Warnings and Precautions in Operator's
Manual
zAlways use an ESD (Electrostatic Discharge) strap when working near
the Control Board
zBe cautious when working near Control Board – Battery voltage is
always present, even with Key OFF
zAlways Disconnect Batteries when removing or replacing components
DURING TESTS:
zCall Technical Services if Diagnostic Time Exceeds One Hour with
Unknown Cause or Course of Action
! !
iv
Nobles Speed Scrub 9002377 REV.00 (08-06)

Nobles Speed Scrub 9002377 REV.00 (08-06)
1
Speed Scrub Component Locator
(Page 1 of 4)
6
7
8
911
14
2
33
10
5
1. Battery Meter (Battery Discharge Indicator)
2. Reverse Trigger
3. Start Triggers (Propel/Scrub)
4. Brush Pressure Meter
5. Control Console Height Adjustment Lever
6. Speed Control Knob (Potentiometer)
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
I

2
Nobles Speed Scrub 9002377 REV.00 (08-06)
Speed Scrub Component Locato
r
(Page 2 of 4)
FRONT
BOTTOM
VIEW
FRONT
VACUUM FAN
MOTOR M3
RECOVERY TANK
INTERLOCK SWITCH
CONTROL BOARD AND
CIRCUIT BREAKERS
PROPEL MOTOR M4
FRONT
BOTTOM
VIEW
FaST PUMP MOTOR M6
FRONT
I

Speed Scrub Component Locato
r
(Page 3 of 4)
CYLINDRICAL SCRUB
BRUSH MOTORS DISK SCRUB BRUSH MOTORS
SCRUB HEAD ACTUATOR M5 SCRUB HEAD ACTUATOR M5
ACTUATOR SCRUB/TRANSPORT SWITCH
ACTUATOR RAISE LIMIT SWITCH
ACTUATOR LOWER LIMIT SWITCH
MOTOR
M1 MOTOR
M1 MOTOR M2
MOTOR
M2
Nobles Speed Scrub 9002377 REV.00 (08-06)
3
I

4
Nobles Speed Scrub 9002377 REV.00 (08-06)
Speed Scrub Component Locato
r
(Page 4 of 4)
VACUUM FAN
SWITCH
CHARGER
INTERLOCK
SWITCH
(OFF-BOARD
CHARGER)
CONVENTIONAL
SOLENOID VALVE
ON-BOARD CHARGER
CONTROL BOARD, FUSE, & CIRCUIT BREAKERS
STANDOFF
BRUSH
CONTACTOR
CR1
STANDOFF
100A FUSE F1
CIRCUIT
BREAKERS
CONTROL BOARD
CB4
10A RELAYS
CB1
25A
CB2
25A
CB3
25A
CR2
CR4 CR3
I

Nobles Speed Scrub (08--06)
MACHINE SPECIFICATIONS
MODEL Disk,
24 in / 600mm
Disk,
28 in / 700mm
Disk,
32 in / 800mm
Cylindrical,
26 in / 650mm
Cylindrical,
32 in / 800mm
LENGTH 53.4 in / 1,357 mm 55.5 in / 1,408 mm 58 in / 1,471 mm 55 in / 1,399 mm 55 in / 1,399 mm
WIDTH 25.4 in / 645 mm 29 in / 737 mm 33 in / 838 mm 28 in / 711 mm 34 in / 864 mm
HEIGHT 44 in / 1120 mm
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 332 lb / 151 kg 342 lb / 155 kg
WEIGHT WITH BATTERIES 569 lb / 258 kg 593 lb / 269 kg 606 lb / 275 kg 606 lb / 275 kg 615 lb / 279 kg
RECOVERY TANK CAPACITY 27 gal / 105 L
SOLUTION TANK CAPACITY 22.5 gal / 85 L
DRIVE SYSTEM Transaxle, 24 V, .25 hp / .19 kW
TRAVEL SPEED, MAXIMUM Cleaning: 220 ft / 67 m per min Transporting: 235 ft / 72 m per min
PRODUCTIVITY RATE
Theoretical
26,400 ft2/
2,450 m2h
30,800 ft2/
2,860 m2h
35,200 ft2/
3,270 m2h
28,600 ft2/
2,660 m2h
35,200 ft2/
3,270 m2h
PRODUCTIVITY RATE
Estimated Actual
17,875 ft2/
1,660 m2h
20,800 ft2/
1,930 m2h
24,000 ft2/
2,230 m2h
19,200 ft2/
1,785 m2h
24,000 ft2/
2,230 m2h
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 5.9 in / 151 mm
BRUSH PRESSURE up to 120 lb / 54 kg
SOLUTION FLOW RATE .5 gpm /
1.89 L/min .50 gpm / 1.89 L/min .6 gpm /
2.27 L/min
.6 gpm /
2.27 L/min
SQUEEGEE WIDTH 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 Qty 2, .63 hp / .47 kW, 1500 rpm,
24 V, 23 A
VACUUM MOTOR .85 hp / .63 kW, 640 W, 3--stage 5.7, 24 V, 26 A
WATER LIFT -- AIR FLOW 62in/55mm--69ft
3/ 32.4 L3/m
BATTERIES Qty 4, 6 V
BATTERY CAPACITY 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 Gel = Up to 4.0 hours
ON--BOARD CHARGER 120 VAC, 10 A, 50/60 Hz, 24 VDC, 20 A output
TOTAL POWER CONSUMPTION 50 A nominal
VOLTAGE DC 24 VDC
PROTECTION GRADE IPX3
DECIBEL RATING AT OPERA-
TOR’S EAR, INDOORS.** 67dBA 68dBA
VIBRATION AT CONTROLS <.39 ft/s2/ <.1188 m/s2<.34 ft/s2/ <.103 m/s2
ACCELERATION RATE ON
OPERATOR -- MAX. .56ft/.179m/s
2
GRADE LEVEL, MAX. 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)
5
I

FaST SYSTEM Disk,
24 in / 600mm
Disk,
28 in / 700mm
Disk,
32 in / 800mm
Cylindrical,
26 in / 650mm
Cylindrical,
32 in / 800mm
PRODUCTIVITY RATE
Estimated Actual
20,075ft2/
1,865m2/h
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 0.22 gpm / 0.83 L/min.
0.15 gpm /
0.57 L/min.
0.22 gpm /
0.83 L/min.
CONCENTRATE FLOW RATE 0.0193oz /
0.57CC /min. 0.028oz / 0.83CC /min. 0.0193oz / 0.57CC /min.
0.028oz /
0.83CC /min.
CONCENTRATE TO WATER
DILUTION RATIO 1:1000
MACHINE DIMENSIONS
A
B
44 in
1,120 mm
C
Models: 24 in / 600 mm 28 in / 700 mm 32 in / 800 mm 26 in / 650 mm 28 in / 800 mm
Disk Disk Disk Cylindrical Cylindrical
A= 53.4 in / 1,357 mm 55.5 in / 1,408 mm 58 in / 1,471 mm 55 in / 1,399 mm 55 in / 1,399 mm
B= 25.4 in / 645 mm 29 in / 737 mm 33 in / 838 mm 28 in / 711 mm 34 in / 864 mm
C= 35.7 in / 908 mm 41.3 in / 1,051 mm 46.6 in / 1,185 mm 41.3 in / 1,051 mm 46.6 in / 1,185 mm
6
Nobles Speed Scrub 9002377 REV.00 (08-06)
I

Commonly Used Electrical Symbols & Terms
+-
Battery Fuse
Normally Closed
Push-Button Switch
Normally Open
Switch
CR1
Relay Coil
(Part 1 of Relay)
Circuit Breaker
Motor
Wires Connected
Together
Normally Open
Push-Button Switch
Wiring Color Codes
(Unless otherwise marked)
0
1
2
3
4
5
6
7
8
9
Tan
Pink
Brown
Orange
Yellow
Green
Blue
Purple
Gray
White
Right Most Digit
of Wire Number Color of Wire
Example of Wiring Numbers & Colors:
1 RED 25 7 13 BLK
Normally Open
Limit Switch Normally Closed
Limit Switch
Indicates Component
is Energized
Plug-in
Connection
NOTE: The term “NORMALLY” refers to the components’ “at rest” or “de-energized” position
Diode
Wires Not
Connected Together
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
Indicates Movement
from Normal Position Indicates Component in Position Other than Normal
Relay Contacts (Part 2 of Relay)
Normally Open Normally Closed
CR1 CR1
Solenoid (Valve
or Actuator) Potentiometer
i
Information
!
Warning!Assembly
Normally Open
Double Throw
Momentary Switch
Nobles Speed Scrub 9002377 REV.00 (08-06)
7
M

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.
Speed Scrub – Maintenance
(Page 1 of 16)
8
Nobles Speed Scrub 9002377 REV.00 (08-06)
M

BATTERY INSTALLATION
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
FIG. 2
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).
Machine
Front
RED
BLACK
SQUEEGEE REMOVAL & INSTALLATION
REMOVING 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.Remove the vacuum hose from the squeegee
assembly. Note loop and clip on hose (Figure 4).
F
FIG. 4
4. Loosen theknobs and slide squeegee assembly away
from pivot bracket (Figure 5).
FIG.5
5.Installation is in reverse order of removal.
Speed Scrub – Maintenance
(Page 2of 16)
Nobles Speed Scrub 9002377 REV.00 (08-06)
9
M

Nobles Speed Scrub (08--06)
6. Check the squeegee blades for proper deflection.
The blades should deflect as shown (Figure 6).
FIG. 6
7. 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
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)
CIRCUIT BREAKERS AND FUSES
FIG. 7
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
Speed Scrub – Maintenance
(Page 3of 16)
12.5 mm
½”
10
Nobles Speed Scrub 9002377 REV.00 (08-06)
M

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).
Speed Scrub – Maintenance
(Page 4of 16)
Nobles Speed Scrub 9002377 REV.00 (08-06)
11
M

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 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. 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.
Speed Scrub – Maintenance
(Page 5of 16)
12
Nobles Speed Scrub 9002377 REV.00 (08-06)
M

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.
Speed Scrub – Maintenance
(Page 6of 16)
Nobles Speed Scrub 9002377 REV.00 (08-06)
13
M

To Adjust an Uneven Brush Pattern:
Tools required: Measuring device, 1--1/16 in / 27 mm
wrench and 15/16 in / 24mm 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.
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).
FIG. 53
3. Recheck brush pattern.
NOTE: Replace brush when bristles are worn to 5/8 in /
15 mm.
To Adjust a Tapered Brush Pattern:
Tools required: 3/8 in / 10mm wrench and 6mm hex
wrench
1. Raise the scrub head off floor and remove key.
2. Remove the idler plate from the brush (Figure 54).
FIG. 54
3. Hold the brush plug shaft with a wrench and loosen
the 6mm hex screw (Figure 55).
FIG. 55
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).
FIG. 56
5. Recheck brush pattern.
NOTE: Replace brushes when bristles are worn to 5/8
in / 15 mm.
Speed Scrub – Maintenance
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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. 57
2. Rinse out the recovery tank (Figure 58).
FIG. 58
3. Remove the recovery tank float shut--off screen
and clean (Figure 59).
FIG. 59
4. Drain the solution tank (Figure 60).
FIG. 60
5. Rotate pad or replace when worn (Figure 61).
Disk Model
FIG. 61
6. Empty and rinse out the debris trough (Figure 62).
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 5/8in/
15 mm.
Speed Scrub – Maintenance
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15mm
(5/8”)
Cylindrical
Brush Model
FIG. 63
8. Remove debris buildup from the underside of the
cylindrical brush scrub head, including the idler
plates and drive hubs (Figure 64).
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. 66
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.
FIG. 67
12. Inspect the condition of the scrub head skirt,
replace if worn or damaged (Figure 68).
Cylindrical Brush Model
Disk Model
FIG. 68
Speed Scrub – Maintenance
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