KENT Razor 20 User manual

Sim
p
le. Clean.
Razor™ 20 / 20T
SERVICE MANUAL
Kent model: 908 7200 020
908 7201 020
9097065000(2) 2009-06

ENGLISH SERVICE MANUAL
29097065000(2)2009-06 Razor™ 20 / 20T
TABLE OF CONTENTS
GENERAL INFORMATION......................................................................................................................................... 4
CONVENTIONS ..................................................................................................................................................... 4
MACHINE LIFTING ................................................................................................................................................ 4
MACHINE TRANSPORTATION ............................................................................................................................. 4
OTHER REFERENCE MANUALS ......................................................................................................................... 4
SAFETY ................................................................................................................................................................. 5
SYMBOLS .............................................................................................................................................................. 5
GENERAL INSTRUCTIONS .................................................................................................................................. 5
TECHNICAL DATA ................................................................................................................................................ 7
DIMENSIONS MACHINE ....................................................................................................................................... 8
MAINTENANCE ..................................................................................................................................................... 9
SCHEDULED MAINTENANCE TABLE ................................................................................................................. 9
MACHINE NOMENCLATURE ............................................................................................................................. 10
SOLUTION/CLEAN WATER SUPPLY SYSTEM...................................................................................................... 13
SOLUTION/CLEAN WATER TANK AND SUPPLY SYSTEM CLEANING............................................................ 13
SOLUTION FILTER CLEANING .......................................................................................................................... 13
SOLENOID VALVE DISASSEMBLY/ASSEMBLY ................................................................................................ 14
TROUBLESHOOTING ......................................................................................................................................... 14
BRUSHING SYSTEM................................................................................................................................................ 15
BRUSH/PAD CLEANING ..................................................................................................................................... 15
BRUSH/PAD-HOLDER/CYLINDRICAL BRUSH DECK DISASSEMBLY/ASSEMBLY ........................................ 15
BRUSH MOTOR ELECTRICAL INPUT CHECK .................................................................................................. 16
BRUSH MOTOR CARBON BRUSH CHECK/REPLACEMENT .......................................................................... 18
BRUSH MOTOR DISASSEMBLY/ASSEMBLY .................................................................................................... 18
BRUSH ENABLING MIVROSWITCH ADJUSTMENT/REPLACMENT (For Razor™ 20T).................................. 19
TROUBLESHOOTING ......................................................................................................................................... 20
RECOVERY WATER SYSTEM ................................................................................................................................. 21
RECOVERY WATER TANK AND VACUUM GRID CLEANING, AND COVER GASKET CHECK ....................... 21
SQUEEGEE CLEANING/CHECK/REPLACEMENT AND SQUEEGEE BLADE REPLACEMENT...................... 22
VACUUM SYSTEM MOTOR FILTER CLEANING ............................................................................................... 23
VACUUM SYSTEM MOTOR ELECTRICAL INPUT CHECK................................................................................ 23
VACUUM SYSTEM MOTOR CARBON BRUSH CHECK/REPLACEMENT ........................................................ 24
VACUUM SYSTEM MOTOR DISASSEMBLY/ASSEMBLY.................................................................................. 25
SQUEEGEE SPRING CHECK/REPLACEMENT................................................................................................. 26
TROUBLESHOOTING ......................................................................................................................................... 27
DRIVE SYSTEM........................................................................................................................................................ 28
TRACTION ENABLING MICROSWITCH ADJUSTMENT/REPLACEMENT (For Razor™ 20T).......................... 28
MAXIMUM SPEED POTENTIOMETER DISASSEMBLY/ASSEMBLY(For Razor™ 20T) ................................... 29
DRIVE SYSTEM MOTOR ELECTRICAL INPUT CHECK (For Razor™ 20T)...................................................... 30
DRIVE SYSTEM MOTOR CARBON BRUSH CHECK AND REPLACEMENT (For Razor™ 20T) ...................... 31
DRIVE SYSTEM MOTOR-DIFFERENTIAL DISASSEMBLY/ASSEMBLY (For Razor™ 20T) ............................. 32
TROUBLESHOOTING (For Razor™ 20T) ........................................................................................................... 33
DRIVE SYSTEM ELECTRONIC BOARD DIAGNOSTIC TABLE (For Razor™ 20T) ........................................... 34

SERVICE MANUAL ENGLISH
Razor™ 20 / 20T 9097065000(2)2009-06 3
TABLE OF CONTENTS
OTHER SYSTEMS.................................................................................................................................................... 35
SCREW AND NUT TIGHTENING CHECK........................................................................................................... 35
ELECTRICAL SYSTEM ............................................................................................................................................ 36
MACHINE WORKING HOUR CHECK (with optional hour counter) .................................................................... 36
BATTERY CHARGE AND MAINTENANCE (All models) ..................................................................................... 36
BATTERY DISASSEMBLY/ASSEMBLY ............................................................................................................... 36
BATTERY TYPE SETTING (WET OR GEL) ....................................................................................................... 37
FUSE CHECK/REPLACEMENT .......................................................................................................................... 38
BRUSH MOTOR ELECTROMAGNETIC SWITCH DISASSEMBLY/ASSEMBLY ................................................ 39
DRIVE SYSTEM ELECTRONIC BOARD DISASSEMBLY/ASSEMBLY (For Razor™ 20T) ................................ 40
FUNCTION ELECTRONIC BOARD DISASSEMBLY/ASSEMBLY....................................................................... 41
TROUBLESHOOTING ......................................................................................................................................... 42
COMPONENT LAYOUT (For Razor™ 20) ........................................................................................................... 43
WIRING DIAGRAM (For Razor™ 20) .................................................................................................................. 44
COMPONENT LAYOUT (For Razor™ 20T)......................................................................................................... 45
WIRING DIAGRAM (For Razor™ 20T) ................................................................................................................ 46
EB1 ELECTRONIC BOARD CONNECTOR PINS ............................................................................................... 47

GENERAL INFORMATION
ENGLISH SERVICE MANUAL
49097065000(2)2009-06 Razor™ 20 / 20T
GENERAL INFORMATION
CONVENTIONS
Forward, backward, front, rear, left or right are intended with reference to the operator’s position, that is to say in driving position
with the hands on the handlebar.
MACHINE LIFTING
WARNING!
Do not work under the lifted machine without supporting it with safety stands.
MACHINE TRANSPORTATION
WARNING!
Before transporting the machine, make sure that:
All covers are closed.–
The ignition key is removed.–
The machine is securely fastened to the means of transport.–
OTHER REFERENCE MANUALS
The following manuals are available at KENT Literature Service Department:
KENT Razor™ 20 - Razor™ 20T: User Manual - Form Number 9097063000–
KENT Razor™ 20 - Razor™ 20T: Spare Parts List - Form Number 9097064000–
Assembling Instruction– Hour meter Kit - Form Number 9096952000
Assembling Instruction– Extra Pressure Kit - Form Number 909 6759 000
Assembling Instruction– Splash Guard Kit - Form Number 909 6745 000
SAFETY
The following symbols indicate potentially dangerous situations. Always read this information carefully and take all necessary
precautions to safeguard people and property.

GENERAL INFORMATION
SERVICE MANUAL ENGLISH
Razor™ 20 / 20T 9097065000(2)2009-06 5
SYMBOLS
DANGER!
It indicates a dangerous situation with risk of death for the operator.
WARNING!
It indicates a potential risk of injury for people or damage to objects.
CAUTION!
It indicates a caution related to important or useful functions.
Pay careful attention to the paragraphs marked by this symbol.
NOTE
It indicates a remark related to important or useful functions.
CONSULTATION
It indicates the necessity to refer to the User Manual before performing any procedure.
GENERAL INSTRUCTIONS

DANGER!
This machine must be used by properly trained operators only. Children or disabled people cannot use this–
machine.
Do not wear jewels when working near electrical components.–
Do not work under the lifted machine without supporting it with safety stands.–
–
vapours: This machine is not suitable for collecting dangerous powders.
Before performing any cleaning, maintenance, repair or replacement procedure disconnect the battery–
connector and remove the ignition key.
–
gases are released.
Battery charging produces highly explosive hydrogen gas. Keep the tanks lifted during battery charging–


GENERAL INFORMATION
ENGLISH SERVICE MANUAL
69097065000(2)2009-06 Razor™ 20 / 20T
WARNING!
To avoid any unauthorized use of the machine, remove the ignition key.–
Do not leave the machine unattended without being sure that it cannot move independently.–
Always protect the machine against the sun, rain and bad weather, both under operation and inactivity–
condition. Store the machine indoors, in a dry place: This machine must be used in dry conditions, it must
not be used or kept outdoors in wet conditions.
–
Do not allow to be used as a toy. Close attention is necessary when used near children.–
Use only as shown in this Manual. Only Kent recommended accessories must be used.–
Take all necessary precautions to prevent hair, jewels and loose clothes from being caught by the machine–
moving parts.
–
Do not use the machine in particularly dusty areas.–
While using this machine, take care not to cause damage to people or objects.–
Do not bump into shelves or scaffoldings, especially where there is a risk of falling objects.–
–
The machine working temperature must be between +32°F and +104°F (0°C and +40°C).–
The machine storage temperature must be between +32°F and +104°F (0°C and +40°C).–
The humidity must be between 30% and 95%.–
–
–
Do not use the machine as a means of transport.–
–
–
Do not tamper with the machine safety guards and follow the ordinary maintenance instructions–
scrupulously.
Do not allow any object to enter into the openings. Do not use the machine if the openings are clogged.–
Always keep the openings free from dust, hairs and any other foreign material which could reduce the air

–
This machine cannot be used on roads or public streets.–
Pay attention during machine transportation when temperature is below freezing point. The water in the–
recovery tank or in the hoses could freeze and seriously damage the machine.
–
brushes or pads could reduce safety.
–
assistance from the authorised personnel or from an authorised Service Center.
–
To ensure machine proper and safe operation, the scheduled maintenance shown in the relevant chapter of–
this Manual, must be performed by the authorised personnel or by an authorised Service Center.
–
Do not wash the machine with direct or pressurised water jets, or with corrosive substances.–
The machine must be disposed of properly, because of the presence of toxic-harmful materials (batteries,–

Do not pull or carry the machine by the battery charger cable and never use the battery charger cable as–
a handle. Do not close a door on the battery charger cable, or pull the battery charger cable around sharp
edges or corners. Do not run the machine on the battery charger cable.
Keep the battery charger cable away from heated surfaces.–
Do not charge the batteries if the battery charger cable or the plug are damaged. If the machine is not–
working as it should, has been damaged, left outdoors or dropped into water, return it to the Service Centre.
–
number plate, match the electrical mains voltage.
Do not smoke while charging the batteries.–
–
in. Before performing any maintenance procedure, disconnect the battery charger cable from the electrical
mains.

GENERAL INFORMATION
SERVICE MANUAL ENGLISH
Razor™ 20 / 20T 9097065000(2)2009-06 7
TECHNICAL DATA
Modello
Razor™ 20
(1 brush/padholder,
without drive system)
Razor™ 20T
(1 brush/padholder,
with drive system)
Machine height 41.7 in (1.058,5 mm)
Solution tank capacity 11.1 USgal (42 litri)
Recovery water tank capacity 11.1 USgal (42 litri)
 0 ÷ 0.4 gpm (0 ÷ 1,6 lt/min)
Solution/clean water autonomy 0,3 gpm (1,1 lt/min) ~ 36 min Media/Average
Front wheel diameter 7,9 in (200 mm)
 130 psi (0.9 N/mm2)
 435.1 psi (3 N/mm2)
Rear wheel diameter 3.9 in (100 mm)
Vacuum system motor power 0.44 hp (330 W)
Drive system motor power — 0.27 hp (200 W)
Drive speed (variable) — da 0 a 2.8 mph
(da 0 a 4,5 km/h)
Max gradeability — 16% - 9°
Working gradeability 2 % - 1°
Sound pressure level (at the operator’s position) (ISO 11201, ISO 4871) (LpA) 66 dB(A) ± 3dB(A)
Sound pressure level (to the machine) (ISO 3744, ISO 4871) (LwA) 84 dB(A)
Vibration level at the operator’s arms (ISO 5349-1) < 98,4 in/ s2(< 2,5 m/s2)
Standard batteries WET (2 x 12 V) 24V 105Ah
Standard batteries autonomy ~ 3,2h ~ 2,6h
Battery compartment size (width x length x height) 13.8 x 13.8 x 11.8 in (350 x 350 x 300 mm)
Vacuum system circuit capacity 41.5 in H2O (1.055 mm H2O)
Cleaning width 20.9 in (530 mm)
Squeegee width 29.9 in (760 mm)
Machine maximum length 48.3 in (1.228 mm)
Machine width without squeegee 21.3 in (540,8 mm)
Brush diameter 20.9 in (530 mm)
Deck right/left offset 3/- in (75,9/- mm)
Brush distance from the ground (when lifted) 2,36 in (60,1 mm)
Weight without batteries and with empty tanks 178.6 lbs (81 kg) 211.6 lbs (96 kg)
Maximum weight with batteries and full tanks 469.6 lbs (213 kg) 504.5 lbs (229 kg)
Brush motor power 0.64 hp (480 W)
Brush speed 153 rpm
Brush/pad-holder pressure with extra-pressure function turned off 45.2 lbs (20,5 kg)
Brush/pad-holder pressure with extra-pressure function turned on (Optional) - 66,1 lbs (30 kg)
 
Battery maximum size
Brush and squeegee maximum size
Full solution tank
Optional equipment installed
Wheel weight checked
Each wheel print checked on cement
Result expressed as maximum value for both front and rear wheels

GENERAL INFORMATION
ENGLISH SERVICE MANUAL
89097065000(2)2009-06 Razor™ 20 / 20T
DIMENSIONS RAZOR™ 20
1.058,5 mm
540,8 mm
1.228 mm 760 mm
DIMENSIONS RAZOR™ 20T
1.058,5 mm
540,8 mm
1.228 mm 760 mm

GENERAL INFORMATION
SERVICE MANUAL ENGLISH
Razor™ 20 / 20T 9097065000(2)2009-06 9
MAINTENANCE
The lifespan of the machine and its maximum operating safety are ensured by correct and regular maintenance
WARNING!

The following tables provides the scheduled maintenance. The intervals shown may vary according to particular working conditions,

For instructions on maintenance procedures, see the following paragraphs.
SCHEDULED MAINTENANCE TABLE
Procedure Daily, after
machine use Weekly Every six months Yearly
Battery charging
Squeegee cleaning
Brush/pad cleaning

Squeegee blade check and replacement



Screw and nut tightening check (1)
Brush/pad-holder motor carbon brush check or replacement
Vacuum system motor carbon brush check or replacement
Drive system motor carbon brush check or replacement (For
Razor™ 20T)
 

GENERAL INFORMATION
ENGLISH SERVICE MANUAL
10 9097065000(2)2009-06 Razor™ 20 / 20T
MACHINE NOMENCLATURE

these two nomenclature pages. Refer to these pages whenever you need to identify a component mentioned in the text..
Control panel1.
Handlebar2.
3.
4.
Battery charger data inspection window5.
Battery charger cable6.
Battery charger cable holder7.
Recovery water drain hose plug8.
Ignition key9.
Squeegee lifting/lowering lever10.
Deck lifting/lowering pedal11.
11a. Pedal position when deck is lifted
11b. Pedal position when deck is lowered
11c. Pedal position when the extra pressure function is on
(if applicable)
Battery connector (red). This connector also works as12.
EMERGENCY switch, to stop immediately all functions.
Rear steering wheel13.
14.
Squeegee vacuum hose15.
Recovery water drain hose16.
Solution drain and level check hose17.
Deck with one brush/pad-holder18.
Brush/pad-holder19.
Solution tank20.
Recovery water tank21.
Recovery water tank cover22.
Can holder23.
24.
Squeegee25.
Squeegee mounting handwheels26.
Squeegee balance adjusting handwheel27.
Machine straight forward movement adjusting handwheel28.
29.
Recovery water tank cover (opened to be cleaned)30.
Tank cover gasket31.
Cover movable retaining plate32.
33.
Serial number plate/technical data34.
Squeegee bumper wheels35.
36.
37.
Filter38.
Deck bumper wheels39.
Recovery water tank (open)40.
Detergent hose41.
Lifted tank tie rod42.
Vacuum system motor cover43.
44.
Solution tap45.
Batteries46.
Battery caps47.
Solenoid valve48.
Battery connection diagram49.
Brush/pad-holder and vacuum system switch71.
Brush/pad-holder and vacuum system switch warning light72.
Vacuum system switch73.
Vacuum system switch warning light74.
Brush/pad-holder release switch75.
Brush/pad-holder release switch warning light76.
77.
78.
Hour counter (optional)79.
80.
Battery charge indicator81.
81a. Charged battery warning light (green)
81b. Semi-discharged battery warning light (yellow)
81c. Discharged battery warning light (red)
82.
82a. Flow increase switch
82b. Flow decrease switch

Electronic battery charger90.
Lead (WET) or gel (GEL) battery selector91.
Green warning light (ON: the battery charger is on and92.
batteries are charged)
Yellow warning light (ON: the battery charger is on and93.
batteries are semi-discharged)
Red warning light (ON: the battery charger is on and it is94.
charging the batteries)
 Only for Razor™ 20T
 Only for Razor™ 20

GENERAL INFORMATION
SERVICE MANUAL ENGLISH
Razor™ 20 / 20T 9097065000(2)2009-06 11
MACHINE NOMENCLATURE (Continues)
11
12
10
7
6
5
4
3
921232221
20
18
19
14
45
32
33
31
37
38
2839 29 48 24 4541
30 34
36
13
26 25 15 27 26 35
42 49 40
43
44
46
47
17
16
811c
11b
11a
P100135

GENERAL INFORMATION
ENGLISH SERVICE MANUAL
12 9097065000(2)2009-06 Razor™ 20 / 20T
MACHINE NOMENCLATURE (Continues)
71
82
82b 82c 82a
81a
81b
81c
81
72 74 73 79
RAZOR 20
71
82
82b 82c 82a
81a
81b
81c
81
72 74 73 76 75 79 80 77
78
RAZOR 20T
P100136 P100137
91
94 93 92
90
P100136

SOLUTION SUPPLY SYSTEM
SERVICE MANUAL ENGLISH
Razor™ 20 / 20T 9097065000(2)2009-06 13
SOLUTION SUPPLY SYSTEM
SOLUTION TANK AND SUPPLY SYSTEM CLEANING
Drive the machine to the appointed solution disposal area.1.
 2.
(For Razor™ 20) Turn off the switches (71) and (73).
Empty the solution tank (20) with the hose (17).3.
Start the machine (as shown in the User Manual) and keep it running until the solution tank is completely empty.4.
 5.
(For Razor™ 20) Turn off the switches (71) and (73).
Clean the tank (20) with clean water.6.
Start the machine (as shown in the User Manual) and keep it running until the solution tank is completely empty.7.
8.
SOLUTION FILTER CLEANING
1.
Turn off the switches (71) and (73).2.
Close the solution tap (A) under the machine left lower side. The tap (A) is closed when it is on the position (B) and it is open3.
when it is on the position (C).
4.
NOTE

Open the tap (A).5.
E
G
F
E
D
A
C
B
P100109

SOLUTION SUPPLY SYSTEM
ENGLISH SERVICE MANUAL
14 9097065000(2)2009-06 Razor™ 20 / 20T
SOLENOID VALVE DISASSEMBLY/ASSEMBLY
Disassembly
Remove the brush.1.
Lower the deck by pressing the pedal (11).2.
Remove the screw (A), disconnect the connector (B) and recover the gasket.3.
Disconnect the union (C) from the solenoid valve (D) and recover the gasket.4.
Remove the screws (E).5.
Slightly lift the solenoid valve (D), disconnect the union (F) and recover the gasket.6.
Recover the solenoid valve (D).7.
Assembly
Assemble the components in the reverse order of disassembly.8.
F
E
A
BD
C
S301522
TROUBLESHOOTING
Small amount of solution or no solution reaches the brush
Possible causes:
1.
The solution tap is stuck closed (replace).2.
The solenoid valve is broken or there is an open in the electrical connection (replace the solenoid valve/repair the electrical3.
connection).
There is debris in the solution tank clogging the output hole (clean the tank).4.
5.
The solution reaches the brush also when the machine is off
Possible causes:
There is dirt or calcium deposit on the solenoid valve gasket (clean).1.
The solenoid valve is broken (replace).2.

BRUSHING SYSTEM
SERVICE MANUAL ENGLISH
Razor™ 20 / 20T 9097065000(2)2009-06 15
BRUSHING SYSTEM
BRUSH/PAD CLEANING
CAUTION!

Remove the brushes/pads, as shown in the User Manual.1.
Clean and wash the brushes/pads with water and detergent.2.
Check that the brush/pads are integral and not excessively worn; otherwise replace them.3.
BRUSH/PAD-HOLDER BRUSH DECK DISASSEMBLY/ASSEMBLY
The machine can be equipped with either the brush/pad-holder deck or the cylindrical brush deck.
Disassembly
1.
Remove the brushes/pad-holders, as shown in the User Manual.2.
Lower the brush/pad-holder deck by pressing the pedal (11).3.
Disconnect the brush/pad-holder motor electrical connection (A).4.
Remove the screw (B) and disconnect the electrical connection (C).5.
Disconnect the solution hose connection (D).6.
Remove the screws (F), then remove the brush/pad-holder deck (E).7.
Assembly
Assemble the components in the reverse order of disassembly.8.
G
F
E
C
B
A
B
H
D
S301530A

BRUSHING SYSTEM
ENGLISH SERVICE MANUAL
16 9097065000(2)2009-06 Razor™ 20 / 20T
BRUSH MOTOR ELECTRICAL INPUT CHECK
WARNING!

Check
If the tank (21) contains recovery water:1.
Drive the machine to the appointed recovery water disposal area.

(For Razor™ 20) Turn off the switches (71) and (73)
Empty the recovery water tank (21) with the hose (16).
2.
Remove the brush/pad-holder.3.
Lower the deck by pressing the pedal (11).4.
Turn off the switches (71) and (73).5.
Grasp the handle (41) and carefully lift the tank (40).6.
Apply the amperometric pliers (A) on one cable (B) of the brush motor (C).7.
8.
Turn on the brush/pad-holder by pressing the switch (71) and check that the motor electrical input is 3 - 4 A at 24 V. Turn off9.
the brush/pad-holder by pressing the switch (71).
Remove the amperometric pliers (A).
If the electrical input is higher, perform the following procedures to detect and correct the abnormal input:
NOTE

Check the tightening of F1 fuse screw (see the procedure in Fuse Check/Replacement paragraph).
Check if there is dust or dirt (ropes, cables, etc.) on the brush/pad-holder hub.
Check the motor carbon brushes (see the procedure in the relevant paragraph).
Disassemble the motor (see the procedure in the relevant paragraph), and check the condition of all its components.
If the above-mentioned procedures do not lead to a correct electrical input, the motor must be replaced
(see the procedure in the relevant paragraph).
Reset
Perform steps 3 to 7 in the reverse order.10.
B
C
A
S301533A

BRUSHING SYSTEM
SERVICE MANUAL ENGLISH
Razor™ 20 / 20T 9097065000(2)2009-06 17
BRUSH MOTOR CARBON BRUSH CHECK/REPLACEMENT
Check
If the tank (21) contains recovery water:1.
Drive the machine to the appointed recovery water disposal area.

(For Razor™ 20) Turn off the switches (71) and (73)
Empty the recovery water tank (21) with the hose (16).
2.
Remove the brush/pad-holder.3.
Lower the deck by pressing the pedal (11).4.
Turn off the switches (71) and (73).5.
Grasp the handle (41) and carefully lift the tank (40).6.
Disconnect the battery connector (12).7.
Remove dust and dirt from the motor carbon brush support area (A).8.
Disengage the fasteners (B) and (C and remove four carbon brush supports (A). If necessary, disconnect the electrical9.
connections (D).
Check if the carbon brushes (E) are worn. Replace the carbon brushes when: the contact with the motor armature is10.

If necessary, disconnect the connections (F) and remove the carbon brushes with their supports (A) to replace them.Replace11.
the carbon brushes as an assembly.
Reset
Assemble the components in the reverse order of disassembly, and note the following:12.
When connecting the terminals (F), take care of their insulation from the surrounding parts of the frame.
AA
D
A
D
FC
A
B
E
S301539A

BRUSHING SYSTEM
ENGLISH SERVICE MANUAL
18 9097065000(2)2009-06 Razor™ 20 / 20T
BRUSH MOTOR DISASSEMBLY/ASSEMBLY
Disassembly
Remove the deck (see the procedure in the relevant paragraph).1.
At the workbench, remove the screw (A) from the deck.2.
Remove the hub assembly (B) with a puller.3.
Remove the screws (C).4.
Remove the reduction unit (D).5.
6.
Assembly
Assemble the components in the reverse order of disassembly.7.
D
E
F
C
C
B
A
S301544

BRUSHING SYSTEM
SERVICE MANUAL ENGLISH
Razor™ 20 / 20T 9097065000(2)2009-06 19
BRUSH ENABLING MICROSWITCH ADJUSTMENT/REPLACEMENT (For Razor™ 20T)
1.
2.
Disconnect the battery connector (12).3.
Remove the screws (A) and move the drive paddle cover (B).4.
Check that the springs (C) operate correctly when releasing the drive paddle (D).5.
If necessary, replace the microswitch (F) according to the following procedure:6.
Mark the position of the connectors (I) and disconnect them from the microswitch.
Remove the screws (M).
Remove the microswitch (F).
Install the new microswitch and fasten it with the screws, then connect the connectors (I).
Check that the actuator (E) of the microswitch (F) is in the housing (G) of the cam (H) when the drive paddle is released (D).7.
Also check that the cable contacts (I) are all open (use a tester).
Press the drive paddle (D) and check that the actuator (E), in the positions (J) and (K) activates the microswitch (F) (a clicking8.
sound must be heard). Also check that the cable contacts (I) are all closed (use a tester).
If necessary, to reach the above-mentioned condition, loosen the screws (L) and adjusting the position of the cam (H),
and/or by loosening the screws (M) and adjusting the position of the microswitch (F). Retighten the screws.
CAUTION!
If the microswitch connections (I) are disconnected, pay attention to reconnect them on the same terminals and

Assemble the components by performing steps 3 and 4 in the reverse order.9.
Test the brush operation.10.
B
A
A
D
C
F
KEJ
HG
M
E
G
L
M
H
N
I
S301549A

BRUSHING SYSTEM
ENGLISH SERVICE MANUAL
20 9097065000(2)2009-06 Razor™ 20 / 20T
TROUBLESHOOTING
ALL BRUSHES DO NOT ROTATE
Possible causes
The brush enabling microswitch is misadjusted or broken (adjust or replace).1.
The wiring harness between microswitch and function electronic board is damaged (repair).2.
The brush motor electromagnetic switch wiring harness is damaged (repair).3.
The function electronic board is damaged (replace).4.
The wiring harness between function electronic board and brush motor electromagnetic switch is damaged (repair).5.
The brush motor electromagnetic switch is damaged (replace).6.
The brush motor fuse is open (replace).7.