Nilfisk-Advance SC450 User manual

SC450
2012-11 Form No. 9099600000
Service Manual
Advance SC450, 9087331020
Nilsk SC450, 9087330020
English

Index 2Service Manual – SC450
Index
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Machine General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Service Manual Purpose and Field of Application . . . . . . . . . . . . . . . . . . . . . . 4
Other Reference Manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Conventions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Service and Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Serial Number Label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
General Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Machine Lifting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Machine Transportation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Machine Nomenclature (know your machine) . . . . . . . . . . . . . . . . . . . . . . . . 10
Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Service and Diagnostic Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Scheduled Maintenance Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Control System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Component Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Removal and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Connectors on the Function Electronic Board . . . . . . . . . . . . . . . . . . . . . . . . 22
Electrical System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Component Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Maintenance and Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Machine Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
Recovery System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Component Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Maintenance and Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Removal and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

Index 3Service Manual – SC450
Scrub System, Disc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Component Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Maintenance and Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Removal and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
Solution System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Component Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Maintenance and Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
Squeegee System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
Component Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Maintenance and Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Removal and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63
Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65
Wheel System, Non-Traction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Component Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67

General Information 4 Service Manual – SC450
General Information
Machine General Description
The SC450 is a “man-down” industrial machine designed to wash and dry oors, in civil or industrial envi-
ronments, in one pass. The machine is powered by on-board batteries. The machine is equipped with a single
disc brush, a controlled solution ow dosing system and a rear squeegee with blades, which dries the oor by
vacuuming the dirty water.
Service Manual Purpose and Field of Application
This document is a technical resource intended to help service technicians when carrying out maintenance
and repairs on the SC450, to guarantee the best cleaning performance and a long working life for the machine.
Please read this manual carefully before performing any maintenance and repair procedure on the machine.
Other Reference Manuals
Model Product Code User Manual Spare Parts List
Advance SC450 9087331020 9099602000 9099603000
Nilsk SC450 9087330020 9099589000 9099590000
Assembly Instructions Instruction Code Machines concerned
BATTERY CHARGER KIT 909 6746 000 Nilsk SC 450
20” SPLASH SHIELD KIT 909 6736 000 Nilsk / Advance SC 450
These manuals are available at:
- Local Nilsk-Advance Retailer
- Nilsk-Advance website: www.nilsk.com - www.advance-us.com

General Information 5 Service Manual – SC450
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.
Service and Spare Parts
Service and repairs must be performed only by authorised personnel or Nilsk Service Centers. The authorised
personnel is trained directly at the manufacturer’s premises and has original spare parts and accessories.
Contact Nilsk Retailer indicated below for service or to order spare parts and accessories, specifying the ma-
chine model and serial number.
(Please, apply Retailer label here)
Serial Number Label
The model name and serial number are marked on
the plate (see the example to the side).
Product number and year of production are marked
on the same plate.
This information is useful when requiring machine
spare parts.
Use the following table to write down the machine
identication data.
Model: Scrubber-Dryer SC450 20 B
Prod. Nr: 9087331020
GVW: 190 kg/419 lb
Battery 24 Vdc
37 A Charg.100-240Vac 50-60 Hz
Type E Floor cleaning machine
Serial No: ..................
Date code: .......
LpA = 68 dB(A)
IPX4
2%
“Made in Hungary”
Nilfisk-Advance, Inc.
Plymouth, MN, USA
www.advance-us.com
Conform to:
UL STD 583
Certified to:
CSA STD C22.2 N.68-92 3084826
A Nilfisk-Advance Brand
P200001
Model ...............................................................................................................
Product Nr. .......................................................................................................
Serial No. .........................................................................................................

General Information 6 Service Manual – SC450
Safety
The following symbols indicate potentially dangerous situations. Always read this information carefully and
take all necessary precautions to safeguard people and property.
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.
Note: It indicates a remark related to important or useful functions.
General Instructions
Specic warnings and cautions to inform about potential damages to people and machine are shown below.
Warning! Make sure to follow the safety precautions to avoid situations that may lead to
serious injuries.
– Before performing any cleaning, maintenance, repair or replacement procedure, turn the ma-
chine main switches to “0” and disconnect the battery connector.
– This machine must be used by properly trained operators only.
– Do not wear jewels when working near electrical components.
– Do not work under the lifted machine, if it is not securely xed.
– Do not operate the machine near toxic, dangerous, ammable and/or explosive powders, liquids
or vapors. This machine is not suitable for collecting dangerous powders.
– (For WET batteries only). Keep the battery away from sparks, ames and incandescent material.
During the normal operation explosive gases are released.
– (For WET batteries only). Battery charging produces highly explosive hydrogen gas. Keep the
battery cover open during battery charging and perform this procedure in well-ventilated areas
and away from naked ames.

General Information 7 Service Manual – SC450
Caution! Make sure to follow the safety precautions to avoid situations that may lead to
serious injuries, damages to materials or equipments.
– Carefully read all the instructions before performing any maintenance/repair procedure.
– Before using the battery charger, ensure that frequency and voltage values, indicated on the
machine serial number plate, match the mains voltage.
– 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.
– To reduce the risk of re, electric shock, or injury, do not leave the machine unattended when it
is plugged in.
– Keep the battery charger cable away from heated surfaces.
– Before performing any maintenance procedure, disconnect the battery charger cable from the
electrical mains to avoid any risk of re, electric shock or injuries.
– Do not smoke while charging the batteries.
– 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.
– Before using the machine, close all doors and/or covers.
– This machine is not intended for use by persons (including children) with reduced physical,
sensory or mental capabilities, or lack of experience and knowledge, unless they have been given
supervision or instruction concerning use of the machine by a person responsible for they safety.
Children should be supervised to ensure that they do not play with the machine.
– Close attention is necessary when used near children.
– Use only as shown in this Manual. Use only Nilsk’s recommended accessories.
– Check the machine carefully before each use, always check that all the components have been as-
sembled before use. If the machine is not perfectly assembled it can cause damages to people and
properties.
– Take all necessary precautions to prevent hair, jewels and loose clothes from being caught by the
machine moving parts.
– Do not use the machine on slopes with a gradient exceeding the specications.
– Do not use the machine on incline.
– Do not tilt the machine more than the angle indicated on the machine itself, in order to prevent
instability.
– Do not use the machine in particularly dusty areas.
– Use the machine only where a proper lighting is provided.
– 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.
– Do not lean liquid containers on the machine, use the relevant can holder.

General Information 8 Service Manual – SC450
– The machine working temperature must be between 0°C and +40°C.
– The storage temperature must be between 0°C and +40°C.
– The humidity must be between 30% and 95%.
– When using oor cleaning detergents, follow the instructions on the labels of the detergent
bottles.
– To handle oor cleaning detergents, wear suitable gloves and protections.
– Do not use the machine as a means of transport; do not push/tow it.
– Do not allow the brush/pad to operate while the machine is stationary to avoid damaging the
oor.
– In case of re, use a powder re extinguisher, not a water one.
– 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 ow.
– Do not remove or modify the plates afxed to the machine.
– 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.
– Use only brushes supplied with the machine or those specied in the User Manual. Using other
brushes could reduce safety.
– If parts must be replaced, require ORIGINAL spare parts from an Authorised Dealer or Retailer.
– 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, oils, etc.), which are subject to standards that require disposal in special centres (see
the User Manual).
– (For WET batteries only). When lead (WET) batteries are installed on the machine, do not tilt
the machine for more than 30° from the horizontal plane to prevent the highly corrosive acid
from leaking out of the batteries. If the machine must be tilted to perform any maintenance pro-
cedure, remove the batteries.

General Information 9 Service Manual – SC450
Machine Lifting
Warning! Donotworkundertheliftedmachine,ifitisnotsecurelyxed.
Machine Transportation
Warning! Before transporting the machine, make sure that:
All covers are closed.
The solution and recovery tanks are emptied.
The batteries are disconnected.
The machine is securely fastened to the means of transport.

General Information 10 Service Manual – SC450
Machine Nomenclature (know your machine)
Brush
deck
Control panel
Handlebar
Battery charger data
inspection window
Battery charger cable
Battery charger
cable holder
Rear parking wheel
Squeegee
lifting/lowering lever
Battery
connector (red)
Front wheels on fixed axle
Squeegee
vacuum
hose
Recovery water
drain hose
Solution drain
and level check hose
Brush
Solution
tank
Recovery
tank
Recovery tank
cover
Serial number
plate/technical
data/conformity
certification
Can holder
Squeegee
Squeegee
mounting
handwheel Squeegee
balance
adjusting
handwheel
Squeegee
mounting
handwheel
P200002

General Information 11 Service Manual – SC450
Machine Nomenclature (Continues)
12V
12V
Recovery tank cover
(completely opened)
Machine forward
speed adjusting
handwheel
Tank
cover
gasket
Machine straight forward
movement adjusting
handwheel
Recovery tank cover
(half-open)
Machine
in parking
position
Battery connection
diagram
Vacuum grid with
automatic
shut-off float
Solution
filler neck
Foam filter
Vacuum
system motor
Solution
filter
Solenoid valve
Solution flow
control lever
ECO position of the solution
flow control lever
Batteries
Battery
caps
Water
removable
filler hose
Front wheels
on fixed axle
P200003

General Information 12 Service Manual – SC450
Control Panel
Battery charge
LEDs indicator
Green LED - charged battery
Yellow LED - semi-discharged battery
Red LED - discharged battery
Brush switch
Vacuum system switch
Brush enabling
push-button
Electronic battery
charger
Lead (WET) or gel (GEL)
battery selector
Green warning light
(the battery charger is
on and batteries are
charged)
Yellow warning light
(the battery charger is
on and batteries are
semi-discharged)
Red warning light (the battery
charger is on and it is charging
the batteries)
P200004

General Information 13 Service Manual – SC450
Service and Diagnostic Equipment
Besides a complete set of standard meters, the following instruments are necessary to perform fast checks,
maintenance and repairs on Nilsk-Advance machines:
Besides a complete set of standard meters, the following instruments are necessary to perform fast checks and
repairs on Nilsk-Advance machines:
• Laptop computer charged with the current version of EzParts, Adobe Reader and (if possible) Internet
connection
• Digital Volt Meter (DVM)
• Amperometric pliers with possibility of making DC measurements
• Hydrometer
• Battery charge tester to check 12V batteries
• Static control wrist strap
• Dynamometric wrench set
• A copy of the User Manual and Spare Parts List of the machine to be serviced (provided with the machine
or available at www.advance-us.com or other Nilsk-Advance websites).
The following equipment is also available at Nilsk-Advance Centers:
• Vacuum water lift gauge, P/N 56205281

General Information 14 Service Manual – SC450
Technical Data
General Values
Solution tank capacity 10.5 US gal (40 liters)
Recovery tank capacity 11.9 US gal (45 liters)
Machine length 46.2 in (1,174 mm)
Machine width without squeegee 22 in (559 mm)
Machine height 38.6 in (980 mm)
Cleaning width 20 in (530 mm)
Squeegee width 30 in (760 mm)
Brush diameter 20 in (530 mm)
Diameter of wheels on xed axle 10 in (254 mm)
Wheel pressure on the oor 710 psi (4.9 N/mm2)
Brush pressure with full tank and lowered squeegee 66 lb (30 kg)
Min/max solution ow 0.105/0.422 gpm (0.4/1.6 liters/min)
ECO solution ow 0.105 gpm (0.4 liters/min)
Sound pressure level at workstation (ISO 11201, ISO 4871, EN 60335-2-72) (LpA) 68 dB(A) ± 3 dB(A)
Machine sound pressure level (ISO 3744, ISO 4871, EN 60335-2-72) (LwA) 86 dB(A)
Vibration level at the operator’s arms (ISO 5349-1, EN 60335-2-72) < 98.4 in/s2 (< 2.5 m/s2)
Maximum gradient when working 2%
IP protection class X4
Protection class (electric) III
Vacuum power 0.44 hp (330 W)
Vacuum water lift (blocked) 43.3 inH2O (1,100 mmH2O)
Brush motor power 0.64 hp (480 W)
Brush rotation speed 154 rpm
Total absorbed power 34 A (0.8 kW)
Battery compartment size (width x length x height) 350 x 350 x 300 mm (13.7 x 13.7 x 11.8 in)
Battery voltage 24 V
Standard batteries (2) Dry: 12 V 70 Ah C5
Battery charger 100-240 VAC
Work autonomy (standard batteries) 2 hour
Weight without batteries and with empty tanks 167 lb (76 kg)
Gross vehicle weight (GVW) 419 lb (190 kg)
Shipping weight 227 lb (103 kg)

General Information 15 Service Manual – SC450
Dimensions
38.4 in (976 mm )
30 in (760 mm)46 in (1170 mm)
P200005

General Information 16 Service Manual – SC450
Maintenance
The lifespan of the machine and its maximum operating safety are ensured by correct and regular mainte-
nance.
Warning! Read carefully the instructions in the Safety chapter before performing any
maintenance procedure.
The following table provides the scheduled maintenance. The intervals shown may vary according to particu-
lar working conditions, which are to be dened by the person in charge of the maintenance.
For instructions on maintenance procedures, see the following paragraphs.
Scheduled Maintenance Table
Procedure Daily, after using
the machine Weekly Every six months Yearly
Battery charging
Squeegee cleaning
Brush/pad cleaning
Tank and vacuum grid with oat cleaning, and cover
gasket check
Squeegee blade check and replacement
Solution lter cleaning
WET battery uid level check
Screw and nut tightening check (1)
Brush/pad-holder motor carbon brush check or
replacement
Vacuum system motor carbon brush check or
replacement
(1) And after the rst 8 working hours.

Control System 17Service Manual – SC450
Control System
Functional Description
The function control is performed directly by the brush switch (SW1), the vacuum system switch (SW2) and
the brush activation push-button (SW3).
The switches (SW1) and (SW2) power the function electronic board (EB1).
The control circuits are protected by the fuse (F3) on the electronic board (EB1).
The battery voltage is shown on the LED electronic board (EB2).
Wiring Diagram
J1.1 - Switch power supply J1.1
J1.2
J1.3
J1.4
J2.6 - Power supply (-)
J2.7 - Power supply (+)
J1.6 - Green LED -
J1.5 - Yellow LED -
J1.4 - Red LED -
J1.7 - Common LED +
J3.1 - Solenoid valve (+)
J3.2 - Solenoid valve (-)
J2.5 - Brush motor current detection (+)
J2.4 - Brush motor current detection (-)
J1.8 - Brush system Switch
J1.2 - Brush switch activation
J1.3 - Vacuum system switch
F1 - Battery charger power supply
J2.3 - Vacuum system relay power supply
J2.2 - Brush relay power supply
J2.1 - Relay power supply
VACUUM SYSTEM
SWITCH (SW2)
BRUSH
SWITCH (SW1)
BRUSH ACTIVATION
PUSH-BUTTON (SW3)
CONNECTOR (C2)
VACUUM SYSTEM
MOTOR RELAY (ES2)
BRUSH MOTOR
ELECTROMAGNETIC
SWITCH (ES1)
SOLENOID VALVE AND
ELECTRONIC BOARD FUSE (F3)
FUNCTION
ELECTRONIC BOARD (EB1)
ELECTRONIC BOARD
LED (EB2)
SOLUTION SOLENOID
VALVE (EV1)
P200006

Control System 18Service Manual – SC450
Component Location
• Brush switch (SW1)
• Vacuum system switch (SW2)
• Brush activation push-button (SW3)
• Battery voltage LEDs
• Function electronic board (EB1)
• LED electronic board (EB2)
• Wiring harness
Brush switch (SW1)
Vacuum system switch (SW2)
Brush activation push-button (SW3)
Battery voltage LEDs
Function
electronic
board (EB1)
Wiring harness
LED
electronic
board (EB2)
P200007

Control System 19Service Manual – SC450
Removal and Installation
Function Electronic Board Disassembly/Assembly
Disassembly
1. Drive the machine on a level oor. Make sure that the machine cannot move independently.
2. Check that the control panel switches are turned to “0”. Disconnect the battery connector (red).
3. Move aside the recovery water drain hose.
4. Remove the battery charger cable, if equipped, from the cable holder.
5. Remove the screws (A).
6. Carefully move the panel (B) by disengaging the wiring harness grommet (C) from its housing.
7. Disconnect the connectors (D) of the function electronic board (E).
8. Disengage the four fasteners (F) and remove the function electronic board (E).
Assembly
9. Assemble the components in the reverse order of disassembly, and note the following:
• When installing a new function electronic board (E), set the following:
– battery charger on board (Ch) or not (NO Ch), with the selector (G)
– battery type, Pb (Wet) or Gel, with the selector (H)
A
B
AC
A
GH
D
F
D
E
F
F
DD
F
P200008

Control System 20Service Manual – SC450
Brush Activation Push-Button Disassembly/Assembly
Disassembly
1. Drive the machine on a level oor. Make sure that the machine cannot move independently.
2. Check that the control panel switches are turned to “0”. Disconnect the battery connector (red).
3. Remove the screws (A) and move the brush activation push-button (B).
4. Loosen the ring nut (C) off the bulkhead connection and push the cable (D) inside the handlebar as much
as possible, then pull the cables (E) with the joints (F) of the push-button (B).
5. Cut the cables (E) on the joints (F) and retrieve the push-button (B).
Assembly
6. Assemble the components in the reverse order of disassembly, and note the following:
• Restore the connections (F) by using the joints supplied with the push-button.
• Before tightening the ring nut (C) push the cable (D) inside the handlebar as much as possible.
B
E
F
C
D
ABA
P200009