Clarke CR 28 Boost Service Manual
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Clarke CR 28 Boost Service Manual

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See also: Operator's Manual
READ THIS BOOK
LEA ESTE MANUAL
LISEZ CE MANUEL
Form No. 9097862000 - 05/2008
Operator's Manual
Libro de Instrucciones

SERVICE MANUAL

Manuel d'utilisation
EN
English (1 - 24)
Español (.... - ....)
ES
Français (.... - ....)
FR

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Do you have a question about the CR 28 Boost and is the answer not in the manual?

Questions and answers

Mark Jerome
May 30, 2025

MY VACUUM HOSE KEEPS COMING OF NEED TO PUT CLAMP ON UPPER END AND CAN'T FINGURE OUT HOW TO TAKE IT APART TO GET TO UPPER END OF HOSE

1
1 comments:
Mr. Anderson
May 30, 2025

To access the upper end of the hose on the Clarke CR 28 Boost vacuum for clamping, follow these steps:

1. Drive the machine to the disposal area.
2. Turn the ignition key to "0".
3. Open the covers (e.g., covers 51 and 58 or 45 depending on model version).
4. Locate and clean the vacuum screen with automatic shut-off float.
5. If necessary, release the fasteners (marked A) and open the screen (marked B).
6. This gives access to internal components, including the hose connection area.

These steps allow access to the area where the vacuum hose connects internally for inspection or clamping.

This answer is automatically generated

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Summary of Contents for Clarke CR 28 Boost

  • Page 1: Service Manual

    Operator’s Manual Libro de Instrucciones SERVICE MANUAL Manuel d’utilisation READ THIS BOOK English (1 - 24) Español (..- ..) LEA ESTE MANUAL Français (..- ..) LISEZ CE MANUEL Form No. 9097862000 - 05/2008...

  • Page 3: Table Of Contents

    ENGLISH TABLE OF CONTENTS GENERAL INFORMATION ..........................3 CONVENTIONS....................................3 MACHINE.LIFTING..................................3 MACHINE.TRANSPORTATION............................... .3 OTHER.AVAILABLE.MANUALS...............................3 SAFETY......................................4 SYMBOLS......................................4 GENERAL.INSTRUCTIONS................................4 SYMBOLS.SHOWN.ON.THE.MACHINE............................5 TECHNICAL.DATA................................... .6 MAINTENANCE ............................7 SCHEDULED.MAINTENANCE............................... .7 SCHEDULED.MAINTENANCE.TABLE............................7 MACHINE.NOMENCLATURE.................................
  • Page 4 ENGLISH OTHER SYSTEMS ............................50 SCREW.AND.NUT.TIGHTENING.CHECK............................ .50 FRONT.FAIRING.DISASSEMBLY/ASSEMBLY..........................51 ELECTRICAL SYSTEM ..........................53 MACHINE.WORKING.HOUR.CHECK............................53 HOUR.COUNTER.RESET.PROCEDURE............................53 BATTERY.MAINTENANCE.AND.RECHARGING.......................... .53 BATTERY.DISASSEMBLY/ASSEMBLY............................53 BATTERY.INSTALLATION.AND.BATTERY.TYPE.SETTING.(WET.OR.GEL)................54 FUSE.CHECK/REPLACEMENT..............................55 DRIVE.SYSTEM.ELECTRONIC.BOARD.REPLACEMENT......................56 FUNCTION.ELECTRONIC.BOARD.REPLACEMENT........................57 DASHBOARD.ELECTRONIC.BOARD.REPLACEMENT.......................58 TROUBLESHOOTING..................................59 FUNCTION.ELECTRONIC.BOARD.ERROR.CODES........................

  • Page 5: General Information

    The ignition key is removed. – The machine is securely fastened to the means of transport. OTHER AVAILABLE MANUALS The.following.manuals.are.available.at.Clarke.Literature.Service.Department: – CR 28 BOOST - User.Manual and Spare.Parts.List.- 909786000 ® – Cover tank locking kit - Installation.instruction - 909 682 000 –...

  • Page 6: Safety

    Do not allow to be used as a toy. Close attention is necessary when used near children. – Use only as shown in this Manual. Use only Clarke's recommended accessories. – Do not use with damaged battery charger cable or plug. If the machine is not working as it should, has been damaged, left outdoors or dropped into water, return it to the Service Center.

  • Page 7: Symbols.shown.on.the.machine

    ENGLISH GENERAL INFORMATION WARNING! – Do not use the machine on slopes with a gradient exceeding the specifications. – Use only pads supplied with the machine and those specified in the Operator's Manual. Using other brushes could reduce safety. – Before using the machine, close all doors and/or covers.

  • Page 8: Technical.data

    ENGLISH GENERAL INFORMATION TECHNICAL DATA Description CR 28 BOOST ® Cleaning.width 28.in.(711.mm) Squeegee.width 34.in.(864.mm) Solution.tank.capacity 19.8.gal.(75.liters) Min/max solution flow 0/0.74.gal/min.(0/2.8.liters/min) Recovery.tank.capacity 19.8.gal.(75.liters) Rear.wheel 11.8.in.(300.mm) Wheel specific pressure on the floor (*) Front.116.psi.(0.8.N/mm -.Rear.145.psi.(1.0.N/mm Front.steering,.driving.and.braking.wheel.diameter 9.8.in.(250.mm) Vacuum.system.motor.power 0.67.hp.(500.W) Drive.system.motor.power 0.80.hp.(600.W) Drive.speed.(variable) From.0.to.3.7.mph.(from.0.to.6.km/h)

  • Page 9: Maintenance

    ENGLISH GENERAL INFORMATION MAINTENANCE SCHEDULED MAINTENANCE The.lifespan.of.the.machine.and.its.maximum.operating.safety.are.ensured.by.correct.and.regular.maintenance. WARNING! See the GENERAL INFORMATION and SAFETY paragraphs. The.following.table.provides.the.scheduled.maintenance..The.intervals.shown.may.vary.according.to.particular.working.conditions,. which are to be defined by the person in charge of the maintenance. For.instructions.on.maintenance.procedures,.see.the.following.paragraphs. SCHEDULED MAINTENANCE TABLE Daily, after Every six Procedure Weekly Yearly machine use months Squeegee.cleaning...

  • Page 10: Machine.nomenclature

    ENGLISH GENERAL INFORMATION MACHINE NOMENCLATURE Throughout this Manual you will find numbers in brackets – for example: (2). These numbers refer to the components shown in the nomenclature.pages..Refer.to.these.pages.whenever.it.is.required.to.identify.a.component.mentioned.in.the.text. Control.panel Electromagnetic.brake.unlocking.screws Emergency.push-button Serial.number.plate/technical.data Horn Recovery.tank.cover Scrub.and.vacuum.activation.button Recovery.tank.cover.gasket Extra.pressure.button Recovery.water.vacuum.duct Squeegee.lifting/lowering.and.vacuum.system.on/off.button Vacuum screen with automatic shut-off float Battery.charge.indicator Float 7a..
  • Page 11 ENGLISH GENERAL INFORMATION MACHINE NOMENCLATURE (continues) 7c 7b 7a 19 20 39 41 17 16 18 36 15 S311377A Service Manual - CR 28 BOOST ®...
  • Page 12 ENGLISH GENERAL INFORMATION MACHINE NOMENCLATURE (continues) S311219A S311220A Service Manual - CR 28 BOOST ®...
  • Page 13 ENGLISH GENERAL INFORMATION MACHINE NOMENCLATURE (Continues) S301319A Service Manual - CR 28 BOOST ®...

  • Page 14: Detergent Supply System

    ENGLISH DETERGENT SUPPLY SYSTEM SOLUTION TANK CLEANING Drive.the.machine.to.the.appointed.disposal.and.washing.area. Turn.the.ignition.key.(12).to."0". Empty.the.solution.tank.(59).with.the.valve.(36). Start.the.machine.(as.shown.in.the.User.Manual).and.keep.it.running.until.the.solution.tank.is.completely.empty. Open.the.cover.(56).and.install.the.support.rod.(57). Clean and wash with clean water the cover (56), the tank (59) and the filler (51). Drain.the.water.in.the.tank.with.the.valve.(36). Start.the.machine.(as.shown.in.the.User.Manual).and.keep.it.running.until.the.solution.tank.is.completely.empty. Remove.the.support.rod.(57).and.close.the.cover.(56). Clean the solution filter (see the following procedure). SOLUTION FILTER CLEANING Drive the machine on a level floor.

  • Page 15: Solution.system.solenoid.valve/Tap/Filter.disassembly/Assembly

    ENGLISH DETERGENT SUPPLY SYSTEM SOLUTION SYSTEM SOLENOID VALVE/TAP/FILTER DISASSEMBLY/ASSEMBLY Disassembly Drive.the.machine.to.the.appointed.disposal.area,.and.empty.the.recovery.water.tank.(58).with.the.hose.(22). Empty.the.solution.tank.(59).with.the.tap.(36). Place the machine on a hoisting system (if available), then lift it. Otherwise, drive the machine on a level floor. Turn.the.ignition.key.(12).to."0". Place a suitable jack (A) under the machine right side bracket (B). Lift the machine for 0.78 in (2 cm) with the jack.
  • Page 16 ENGLISH DETERGENT SUPPLY SYSTEM SOLUTION SYSTEM SOLENOID VALVE/TAP/FILTER DISASSEMBLY/ASSEMBLY (Continues) S301321 Service Manual - CR 28 BOOST ®...

  • Page 17: Troubleshooting

    ENGLISH DETERGENT SUPPLY SYSTEM TROUBLESHOOTING SMALL AMOUNT OF SOLUTION OR NO SOLUTION REACHES THE BRUSH Possible causes: The solution filter is clogged/dirty (clean). The.solution.valve.is.closed/semi-closed.(replace). The.solenoid.valve.is.broken.or.there.is.an.open.in.the.electrical.connection.(replace.the.solenoid.valve/repair.the.electrical. connection). There.is.debris.in.the.solution.tank.clogging.the.output.hole.(clean.the.tank). There are debris in the solution hoses clogging the flow (clean the hoses). 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).

  • Page 18: Brushing System

    ENGLISH BRUSHING SYSTEM BRUSH CLEANING CAUTION! It is advisable to use protective gloves when cleaning the brush because there may be cutting debris. Remove.the.brush.as.shown.in.the.User.Manual. Clean.and.wash.the.brush.with.water.and.detergent. Check.the.brush.for.integrity.and.replace.it.if.necessary. SIDE SKIRT CHECK AND REPLACEMENT Check Drive the machine on a level floor. Turn.the.ignition.key.(12).to.“0”. On.both.sides.of.the.machine,.lift.and.remove.the.side.skirt.assembly.(A).from.the.holders.(B).

  • Page 19: Brush.deck.lifting/Lowering.actuator.disassembly/Assembly

    ENGLISH BRUSHING SYSTEM BRUSH DECK LIFTING/LOWERING ACTUATOR DISASSEMBLY/ASSEMBLY Disassembly Drive.the.machine.to.the.appointed.disposal.area,.and.empty.the.recovery.water.tank.(58).with.the.hose.(22). Empty.the.solution.tank.(59).with.the.tap.(36). Drive the machine on a level floor. Turn.the.ignition.key.(12).to."0". Carefully.lift.the.tank.assembly.(60).to.reach.the.batteries. Disconnect.the.battery.connector.(63). Remove.the.deck.(see.the.procedure.in.the.relevant.paragraph). Remove.the.nuts.(A),.then.carefully.remove.the.cover.(B). Carefully.move.the.electrical.component.panel.(C).and.disconnect.the.deck.lifting/lowering.actuator.connector.(D). Remove.the.lower.mounting.screw.(E).of.the.actuator.(F). Remove.the.screw.(G). Remove.the.actuator.(F). Assembly Assemble.the.components.in.the.reverse.order.of.disassembly. S301333 Service Manual - CR 28 BOOST ®...
  • Page 20 ENGLISH BRUSHING SYSTEM BRUSH DECK LIFTING/LOWERING ACTUATOR DISASSEMBLY/ASSEMBLY (Continues) S301334 Service Manual - CR 28 BOOST ®...

  • Page 21: Troubleshooting

    ENGLISH BRUSHING SYSTEM TROUBLESHOOTING OPEN CIRCUIT The.fuse.(F1).causes.an.open.in.the.function.electronic.board.supply.circuit..This.system.prevents.the.circuits.from.being.damaged. in.case.of.failure. If.there.is.an.open.in.the.fuse,.the.possible.causes.are: The.function.electronic.board.wiring.harness.is.damaged.or.shorted.(check.the.power.cables.on.the.function.electronic.board. and.the.relevant.connections). The.function.electronic.board.is.damaged.(replace). THE BRUSH DECK DOES NOT FUNCTION Possible.causes.(see.also.the.Electrical.System.chapter,.function.electronic.board.diagnosis): The.function.electronic.board.wiring.harness.or.the.brush.motors.are.damaged.(repair). The.function.electronic.board.is.damaged.(replace). The.motor.deck.is.shorted.(replace). The.motor.carbon.deck.are.worn.(replace). The.motor.is.faulty.(repair.or.replace). The.wiring.harness.is.damaged.(repair). THE BRUSH DECK CANNOT BE LIFTED/LOWERED OR THE EXTRA PRESSURE FUNCTION CANNOT BE TURNED ON Possible.causes.(see.also.the.Electrical.System.chapter,.function.electronic.board.diagnosis): The deck lifting/lowering actuator end-of-strokes are not properly adjusted (adjust).

  • Page 22: Recovery Water System

    ENGLISH RECOVERY WATER SYSTEM RECOVERY WATER TANK AND VACUUM SCREEN AUTOMATIC SHUT-OFF FLOAT CLEANING Drive.the.machine.to.the.appointed.disposal.area. Turn.the.ignition.key.(12).to."0". Lift.the.cover.(45). Wash with clean water the cover (45), the tank (58) and the vacuum screen (48) with automatic shut-off float. Drain the water in.the.tank.through.the.hose.(22). If necessary, release the fasteners (A) and open the screen (B), recover the float (C), clean all components and then reinstall them.

  • Page 23: Vacuum.system.motor.filter.cleaning

    ENGLISH RECOVERY WATER SYSTEM VACUUM SYSTEM MOTOR FILTER CLEANING Disassembly and cleaning Drive.the.machine.to.the.appointed.disposal.area,.and.empty.the.recovery.water.tank.(58).with.the.hose.(22). Empty.the.solution.tank.(59).with.the.tap.(36). Drive the machine on a level floor. Turn.the.ignition.key.(12).to."0". Disconnect.the.vacuum.hose.(23).from.the.squeegee.(24). Carefully.lift.the.tank.assembly.(60). Remove the vacuum system motor filter (D) and clean it with water and compressed air. Install the filter (D). Carefully.lower.the.tank.assembly.(60).

  • Page 24: Vacuum.system.motor.carbon.brush.check.and.replacement

    ENGLISH RECOVERY WATER SYSTEM VACUUM SYSTEM MOTOR CARBON BRUSH CHECK AND REPLACEMENT Drive.the.machine.to.the.appointed.disposal.area,.and.empty.the.recovery.water.tank.(58).with.the.hose.(22). Empty.the.solution.tank.(59).with.the.tap.(36). Drive the machine on a level floor. Turn.the.ignition.key.(12).to."0". Carefully.lift.the.tank.assembly.(60).to.reach.the.batteries. Disconnect.the.battery.connector.(63). Remove.the.cover.(A).from.the.vacuum.system.motor.(B). Remove.the.screws.(C). Disconnect.the.electrical.connections.(D). Remove.the.carbon.brushes.(E). Check the carbon brushes for wear. Replace the carbon brushes when: the contact with the motor armature is insufficient, the carbon.brushes.are.worn,.the.carbon.brush.contact.surface.is.not.integral,.the.thrust.spring.is.broken,.etc.

  • Page 25: Vacuum.system.motor.disassembly/Assembly

    ENGLISH RECOVERY WATER SYSTEM VACUUM SYSTEM MOTOR DISASSEMBLY/ASSEMBLY Disassembly Drive.the.machine.to.the.appointed.disposal.area,.and.empty.the.recovery.water.tank.(58).with.the.hose.(22). Empty.the.solution.tank.(59).with.the.tap.(36). Drive the machine on a level floor. Turn.the.ignition.key.(12).to."0". Disconnect.the.vacuum.hose.(23).from.the.squeegee.(24). Carefully.lift.the.tank.assembly.(60). Disconnect.the.battery.connector.(63). Disconnect.the.connector.(D).from.the.vacuum.system.motor. Remove.the.screws.(A),.then.remove.the.recovery.water.tank.(B).with.the.vacuum.hose.(C). Remove.the.screws.(E).and.recover.the.washer. Remove.the.vacuum.motor.cover(F). Recover.the.Filter.(G).and.the.gasket.(H). Remove.the.vacuum.system.motor.(I),.the.acoustic.insulation.pipe.(J).and.the.acoustic.insulation.panel.(K) Check the gasket efficency (L) if necessary, replace them. Assembly Assemble.the.components.in.the.reverse.order.of.disassembly,.and.note.the.following: • If necessary, clean the filter (G) before assembling it (see the procedure in the relevant paragraph).

  • Page 26: Squeegee.cleaning/Check.and.blade.replacement

    ENGLISH RECOVERY WATER SYSTEM SQUEEGEE CLEANING/CHECK AND BLADE REPLACEMENT CAUTION! It is advisable to wear protective gloves when cleaning the brushes because there may be sharp debris. Disassembly and cleaning Drive the machine on a level floor. Turn.the.ignition.key.(12).to."I". Lower.the.squeegee.(24).by.pressing.the.switch.(6). Turn.the.ignition.key.(12).to."0". Disconnect.the.vacuum.hose.(23).from.the.squeegee.

  • Page 27: Squeegee.lifting.cable.sliding.shoe.lubrication

    ENGLISH RECOVERY WATER SYSTEM SQUEEGEE LIFTING CABLE SLIDING SHOE LUBRICATION Lower.the.squeegee.(24),.according.to.the.procedure.shown.in.the.User.Manual. Remove.the.batteries.and.the.battery.case.(see.the.procedure.in.the.Electrical.System.chapter). Clean.and.lubricate.the.sliding.shoe.(A).of.the.squeegee.lifting.cable.(B).with.graphite.grease. Install.the.batteries.and.the.battery.case.(see.the.procedure.in.the.Electrical.System.chapter). Lift.the.squeegee.(24). S301340 Service Manual - CR 28 BOOST ®...

  • Page 28: Squeegee.lifting.actuator.disassembly/Assembly

    ENGLISH RECOVERY WATER SYSTEM SQUEEGEE LIFTING ACTUATOR DISASSEMBLY/ASSEMBLY Disassembly Lift.the.squeegee.(24),.according.to.the.procedure.shown.in.the.User.Manual. Remove.the.batteries.and.the.battery.case.(see.the.procedure.in.the.Electrical.System.chapter). Remove.the.retaining.rings.(A).and.the.pin.(B),.thus.disconnecting.the.terminal.(C).of.the.squeegee.lifting.cable.(D). Remove.the.screw.(E). Disconnect.the.connector.(F).of.the.actuator.(I). Disconnect.the.actuator.connector.(G).from.the.clamps.(H). Remove.the.squeegee.lifting.actuator.(I). Assembly Assemble.the.components.in.the.reverse.order.of.disassembly. S301341 Service Manual - CR 28 BOOST ®...

  • Page 29: Squeegee.lifting.cable.disassembly/Assembly

    ENGLISH RECOVERY WATER SYSTEM SQUEEGEE LIFTING CABLE DISASSEMBLY/ASSEMBLY Disassembly Lift.the.squeegee.(24),.according.to.the.procedure.shown.in.the.User.Manual. Remove.the.batteries.and.the.battery.case.(see.the.procedure.in.the.Electrical.System.chapter). Remove.the.retaining.rings.(A).and.the.pin.(B),.thus.disconnecting.the.terminal.(C).of.the.squeegee.lifting.cable.(D). Remove.the.screw.(E).and.recover.the.washer.(F). Remove.the.guide.(G). Carefully.lower.the.tank.assembly.(59). Remove.the.nut.and.the.locknut.(H),.then.remove.the.lifting.cable.(I).from.the.squeegee.assembly.(J). Assembly Assemble.the.components.in.the.reverse.order.of.disassembly,.and.note.the.following: • Before.assembling.the.lifting.cable.(I),.lubricate.the.squeegee.lifting.cable.sliding.shoe.(K).with.graphite.grease. • After installing the squeegee lifting cable, adjust the nut and the locknut (I) so that, when the squeegee is completely lifted, the distance from the floor is 0.78 in (20 mm).

  • Page 30: Troubleshooting

    ENGLISH RECOVERY WATER SYSTEM TROUBLESHOOTING THE VACUUM SYSTEM MOTOR DOES NOT TURN ON The.function.electronic.board.supplies.current.to.the.vacuum.system.motor.directly;.if.the.motor.does.not.work,.possible.causes.are. the.following.(see.also.the.Electrical.System.chapter,.function.electronic.board.diagnosis): The.vacuum.system.motor.carbon.brushes.are.worn.(replace). The.vacuum.system.motor.is.faulty.(check.the.electrical.input). The.function.electronic.board.is.damaged.(replace). DIRTY WATER VACUUMING IS INSUFFICIENT OR THERE IS NO VACUUMING Possible.causes: The vacuum screen with automatic shut-off float is activated because the recovery water tank is full (empty the recovery water tank).

  • Page 31: Parking Brake System

    ENGLISH PARKING BRAKE SYSTEM PARKING BRAKE SYSTEM PUSHING/TOWING THE MACHINE To.move.the.machine.by.hand.it.is.necessary.to.deactivate.the.electromagnetic.brake.(A).by.fully.screwing.the.2.inner.screws.(B).. When.the.operation.is.over,.unscrew.the.2.screws.of.approx..3.turns.to.activate.the.electromagnetic.brake. S301639A WARNING! If the inner screws are not unscrewed, the electromagnetic brake is deactivated. Do not use the machine with the electromagnetic brake deactivated. It is safer to screw the screws (B) only for the time necessary to handle the machine. PARKING BRAKE CHECK Lift the brushes and the squeegee, then drive the machine on a dry floor that offers a good grip.

  • Page 32: Electromagnetic.brake.and.disc.with.braking.masses.disassembly/Assembly

    ENGLISH PARKING BRAKE SYSTEM ELECTROMAGNETIC BRAKE AND DISC WITH BRAKING MASSES DISASSEMBLY/ASSEMBLY Disassembly Drive.the.machine.to.the.appointed.disposal.area,.and.empty.the.recovery.water.tank.(58).with.the.hose.(22). Empty.the.solution.tank.(59).with.the.tap.(36). Place.the.machine.on.a.hoisting.system.(if.available).. Otherwise, drive the machine on a level floor. Turn.the.ignition.key.(12).to."0". Carefully.lift.the.tank.assembly.(60). Disconnect.the.battery.connector.(63). Apply.proper.wedges.to.right.and.left.rear.wheels.(43),.so.that.the.machine.cannot.move.when.the.electromagnetic.brake.(39). is.disassembled. Cut.the.fastening.clamps.(A). Disconnect.the.electromagnetic.brake.connector.(B). Remove.the.screws.(C),.then.remove.the.case.(D).by.disengaging.the.wiring.harness.grommet.(E). Remove.the.screws.(F),.then.remove.the.electromagnetic.brake.(G). Remove.the.disc.with.braking.masses.(H)..Check.the.thickness.(J).of.the.braking.masses.(K).and,.if.it.is.lower.than.0.039.in.(1. mm),.the.disc.(H).must.be.replaced. If necessary, remove the flange (I). Assembly Assemble.the.components.in.the.reverse.order.of.disassembly,.and.note.the.following: •...
  • Page 33 ENGLISH PARKING BRAKE SYSTEM ELECTROMAGNETIC BRAKE AND DISC WITH BRAKING MASSES DISASSEMBLY/ASSEMBLY (Continues) S301642 Service Manual - CR 28 BOOST ®...

  • Page 34: Troubleshooting

    ENGLISH PARKING BRAKE SYSTEM TROUBLESHOOTING THE BRAKE DOES NOT OPERATE Possible.causes: The.electromagnetic.brake.unlocking.handwheel.(41).is.screwed.(unscrew.and.remove). The braking masses are not efficient (replace the electromagnetic brake). (Machines after January 2007) The electromagnetic brake air gap is not properly adjusted (adjust). THE BRAKE DOES NOT DEACTIVATE WHEN PRESSING THE FORWARD/REVERSE GEAR PEDAL Possible.causes: There.is.an.open.in.the.wiring.harness.between.the.drive.system.electronic.board.and.the.electromagnetic.brake.(check/repair.

  • Page 35: Drive System

    ENGLISH DRIVE SYSTEM DRIVING WHEEL COVER DISASSEMBLY/ASSEMBLY Disassembly Drive.the.machine.to.the.appointed.disposal.area,.and.empty.the.recovery.water.tank.(58).with.the.hose.(22). Empty.the.solution.tank.(59).with.the.tap.(36). Place.the.machine.on.a.hoisting.system.(if.available).. Otherwise, drive the machine on a level floor. Turn.the.ignition.key.(12).to."0". Remove.the.brush/pad-holder.deck.(16).or.the.cylindrical.brush.deck.(17).(see.the.procedure.in.the.relevant.paragraph). Turn.the.front.wheel.(R).completely.to.the.left. Apply.proper.wedges.to.right.and.left.rear.wheels.(43),.so.that.the.machine.cannot.move.when.the.front.wheel.(R).is.lifted. With.the.help.of.an.assistant,.slightly.lift.the.front.part.of.the.machine.and.apply.to.the.frame.brackets.(S).two.proper.wooden. shims (T) high enough to keep the front wheel (R) lifted for about 1.18 in (3 cm) from the floor. Lift.the.tank.assembly.(60).and.disconnect.the.battery.connector.(63).
  • Page 36 ENGLISH DRIVE SYSTEM DRIVING WHEEL COVER DISASSEMBLY/ASSEMBLY (continues) S301644 Service Manual - CR 28 BOOST ®...

  • Page 37: Drive.system.motor.electrical.input.check

    ENGLISH DRIVE SYSTEM DRIVE SYSTEM MOTOR ELECTRICAL INPUT CHECK WARNING! This procedure must be performed by qualified personnel only. Drive the machine on a level floor. Turn.the.ignition.key.(12).to."0". Remove.the.brush/pad-holder.deck.(16).or.the.cylindrical.brush.deck.(17).(see.the.procedure.in.the.relevant.paragraph). Turn.the.front.wheel.(A).completely.to.the.left. Apply.proper.wedges.to.right.and.left.rear.wheels.(43),.so.that.the.machine.cannot.move.when.the.front.wheel.(A).is.lifted. With.the.help.of.an.assistant,.slightly.lift.the.front.part.of.the.machine.and.apply.to.the.frame.brackets.(B).two.proper.wooden. shims (C) high enough to keep the front wheel (A) lifted for about 1.18 in (3 cm) from the floor. WARNING! When performing the following procedure, pay attention to the rotation of the driving wheel (A).

  • Page 38: Drive.system.motor.carbon.brush.check.and.replacement

    ENGLISH DRIVE SYSTEM DRIVE SYSTEM MOTOR CARBON BRUSH CHECK AND REPLACEMENT Check and replacement Drive.the.machine.to.the.appointed.disposal.area,.and.empty.the.recovery.water.tank.(58).with.the.hose.(22). Empty.the.solution.tank.(59).with.the.tap.(36). Place.the.machine.on.a.hoisting.system.(if.available).. Otherwise, drive the machine on a level floor. Turn.the.ignition.key.(12).to."0". Carefully.lift.the.tank.assembly.(60). Disconnect.the.battery.connector.(63). Remove the drive system motor carbon brush covers (A) (bayonet joint). Remove the gasket (B) and check them for integrity and efficiency; if necessary, replace them. Remove.the.screws.(C),.then.remove.the.four.carbon.brushes.(D).

  • Page 39: Drive.system.motor.sliding.contact.check.and.replacement

    ENGLISH DRIVE SYSTEM DRIVE SYSTEM MOTOR SLIDING CONTACT CHECK AND REPLACEMENT Check and replacement Drive.the.machine.to.the.appointed.disposal.area,.and.empty.the.recovery.water.tank.(58).with.the.hose.(22). Empty.the.solution.tank.(59).with.the.tap.(36). Place.the.machine.on.a.hoisting.system.(if.available).. Otherwise, drive the machine on a level floor. Turn.the.ignition.key.(12).to."0". Carefully.lift.the.tank.assembly.(60). Disconnect.the.battery.connector.(63). Remove.the.screws.(A),.then.remove.the.sliding.contact.cover.(B). Disconnect.the.sliding.contact.connections.(C). Remove.the.sliding.contact.mounting.screws.(D).and.nuts.(E)..Recover.the.washer.(E). Remove.both.sliding.contacts.(G). Check the sliding contacts (D) for wear. Replace the sliding contacts when: the contact with the sliding ring is insufficient, the sliding.contacts.are.worn,.the.contact.surface.is.not.integral,.the.thrust.spring.is.broken,.etc.
  • Page 40 ENGLISH DRIVE SYSTEM DRIVE SYSTEM MOTOR SLIDING CONTACT CHECK AND REPLACEMENT (continues) S301648 Service Manual - CR 28 BOOST ®...

  • Page 41: Drive.system.motor,.Bearing.and.gasket.disassembly/Assembly

    ENGLISH DRIVE SYSTEM DRIVE SYSTEM MOTOR, BEARING AND GASKET DISASSEMBLY/ASSEMBLY Disassembly Drive.the.machine.to.the.appointed.disposal.area,.and.empty.the.recovery.water.tank.(58).with.the.hose.(22). Empty.the.solution.tank.(59).with.the.tap.(36). Place.the.machine.on.a.hoisting.system.(if.available).. Otherwise, drive the machine on a level floor. Turn.the.ignition.key.(12).to."0". Remove.the.brush/pad-holder.deck.(16).or.the.cylindrical.brush.deck.(17).(see.the.procedure.in.the.relevant.paragraph). Turn.the.front.wheel.(AG).completely.to.the.left. Apply.proper.wedges.to.right.and.left.rear.wheels.(43),.so.that.the.machine.cannot.move.when.the.front.wheel.(AG).is.lifted. With.the.help.of.an.assistant,.slightly.lift.the.front.part.of.the.machine.and.apply.to.the.frame.brackets.(AH).two.proper.wooden. shims (AI) high enough to keep the front wheel (AG) lifted for about 1.18 in (3 cm) from the floor. Lift.the.tank.assembly.(60).and.disconnect.the.battery.connector.(63).
  • Page 42 ENGLISH DRIVE SYSTEM DRIVE SYSTEM MOTOR, BEARING AND GASKET DISASSEMBLY/ASSEMBLY (Continues) Remove.the.screws.(G),.then.remove.the.driving.wheel.assembly.(H). At.the.workbench,.remove.the.electromagnetic.brake.(see.the.procedure.in.the.relevant.paragraph). Remove.the.screws.(I),.then.remove.the.plate.(J). With.a.puller.(K).remove.the.brush.side.bracket.(L). Remove.the.mounting.screws.(M).of.the.driving.wheel.cover.(N)..Recover.the.nuts.(P).and.washers.(O). Remove.the.cover.(N).from.the.reduction.unit.(Q). If.necessary,.remove.the.screws.(S).and.the.fasteners.(T),.then.remove.the.bearing.(R);.if.necessary,.use.a.puller. Remove.the.four.screws.(U),.then.remove.the.carbon.brushes.holder.assembly.(V). If.necessary,.remove.the.bearing.(W). With.a.puller.(K).remove.the.brush.side.bracket.(X). If.necessary,.remove.the.screws.(Z).and.the.fasteners.(AA),.then.remove.the.bearing.(Y);.if.necessary,.use.a.puller. Remove.the.motor.(AB).from.the.reduction.unit.(AC)..Do.not.let.the.oil.coming.out.of.the.hole.(AF)..Do.not.let.dust.and.dirt. enter.the.reduction.unit.through.the.hole.(AF). If.necessary,.remove.the.bearing.(AD). If.necessary,.remove.the.oil.seal.(AE). Assembly Assemble.the.components.in.the.reverse.order.of.disassembly,.and.note.the.following: • the reduction unit spare part (AC) is already filled with oil (AGIP BLASIA 150; quantity 21 cl). •...
  • Page 43 ENGLISH DRIVE SYSTEM DRIVE SYSTEM MOTOR, BEARING AND GASKET DISASSEMBLY/ASSEMBLY (Continues) U R T S S301650 Service Manual - CR 28 BOOST ®...

  • Page 44: Forward.gear.pedal.disassembly/Assembly

    ENGLISH DRIVE SYSTEM FORWARD GEAR PEDAL DISASSEMBLY/ASSEMBLY Disassembly Drive the machine on a level floor. Engage.the.parking.brake. Remove.the.pedal.mounting.screws.(A). Slightly.lift.the.pedal.(B).and.disconnect.the.connector.(C). Assembly Assemble.the.components.in.the.reverse.order.of.disassembly. S301288 Service Manual - CR 28 BOOST ®...

  • Page 45: Forward.gear.pedal.potentiometer.check.and.adjustment

    ENGLISH DRIVE SYSTEM FORWARD GEAR PEDAL POTENTIOMETER CHECK AND ADJUSTMENT Remove.the.forward/reverse.gear.pedal.(see.the.procedure.in.the.relevant.paragraph). At.the.workbench,.remove.the.screws.(A),.then.remove.the.protection.(B). Apply a tester on the connector centre contact (C) and on the side contact (D), then check that the resistance is 0 + 100 Ω (Ohm).when.the.pedal.is.released..If.necessary,.reset.the.resistance.correct.value.by.loosening.the.screw.(F).and.operating.on. the.potentiometer.screw.(E)..Then.tighten.the.screw.(F). Install.the.protection.(B).and.tighten.the.screws.(A). Install.the.forward/reverse.gear.pedal.(see.the.procedure.in.the.relevant.paragraph).

  • Page 46: Speed.reduction.sensor.check/Adjustment

    ENGLISH DRIVE SYSTEM SPEED REDUCTION SENSOR CHECK/ADJUSTMENT Check According.to.the.procedure.shown.in.the.User.Manual,.lift.the.brush/pad-holder.deck.and.the.squeegee,.then.start.the. machine,.drive.it.at.high.speed,.make.turns.both.on.the.right.and.on.the.left,.and.check.the.following: • When.the.steering.wheel.(14).is.turned.for.more.than.1/4.turn.(approximately),.both.on.the.right.and.on.the.left,.the. machine.speed.automatically.decreases.consistently. The.machine.is.equipped.with.an.anti-tilting.safety.system.that.reduces.the.speed.when.turning,.irrespectively.of.the.pressure. on.the.pedal. The.reduction.of.speed.when.turning.is.not.a.malfunction.but.a.characteristic.that.improves.the.machine.stability.in.every. condition. If necessary, adjust the speed reduction sensor according to the following procedure. Adjustment Place the machine on a hoisting system (if available). Otherwise, drive the machine on a level floor. Turn.the.ignition.key.(12).to."0".

  • Page 47: Speed.reduction.sensor.replacement

    ENGLISH DRIVE SYSTEM SPEED REDUCTION SENSOR REPLACEMENT Disassembly Remove.the.front.fairing.(see.the.procedure.in.the.relevant.paragraph). Remove.the.nuts.(93),.then.remove.the.cover.(92). Slightly.move.the.electrical.component.panel.(100). Disconnect.the.speed.reduction.sensor.connector.(A). Remove.two.mounting.screws.(B).of.the.foot.board.(C). Lift.the.foot.board.(D).and.remove.the.sensor.cable.(E).through.the.passage.(F). Remove.the.nuts.(G),.then.remove.the.speed.reduction.sensor.(H).with.the.cable. Assembly Assemble.the.components.in.the.reverse.order.of.disassembly,.and.note.the.following: • Insert.the.speed.reduction.sensor.wiring.harness.(I).with.the.connector.(J).disconnected;.then.connect.the.wiring.harness. to.the.connector.(J),.paying.attention.to.the.cable.colours. • Adjust the speed reduction sensor (see the procedure in the relevant paragraph). S301352 Service Manual - CR 28 BOOST ®...
  • Page 48 ENGLISH DRIVE SYSTEM SPEED REDUCTION SENSOR REPLACEMENT (continues) S301353 Service Manual - CR 28 BOOST ®...

  • Page 49: Driver's.seat.safety.microswitch.operation.check

    ENGLISH DRIVE SYSTEM DRIVER'S SEAT SAFETY MICROSWITCH OPERATION CHECK Check.for.proper.machine.operation.in.forward.and.reverse.gear,.as.shown.in.the.User.Manual. Check.that.the.ignition.key.(12).is.turned.to.“I”.and.that.the.battery.green.warning.light.(7a).is.on. Slightly.lift.from.the.seat.(37).and.try.to.start.the.machine.with.the.hands.on.the.steering.wheel.and.by.gradually.pressing.the. pedal.(15),.both.in.forward.and.in.reverse.gear:.Check.that.the.machine.can.move.neither.forward.nor.backward..Otherwise,. check.the.proper.operation.of.the.safety.system.that.prevents.the.machine.movement.if.the.operator.is.not.seating.on.the. driver's.seat,.according.to.the.following.procedure: • Check.for.driver's.seat.microswitch.proper.operation,.otherwise.replace.it.according.to.the.following.procedure. • If.necessary,.check.the.driver's.seat.microswitch.wiring.harness. DRIVER'S SEAT SAFETY MICROSWITCH REPLACEMENT Disassembly Drive the machine on a level floor. Turn.the.ignition.key.(12).to."0". Open.the.cover.(56).and.install.the.support.rod.(57). Remove.the.cover.(A).and.disconnect.the.microswitch.connector.(B). Remove.the.screws.(C). Remove.the.support.rod.(57).and.close.the.cover.(56). Slightly.move.the.seat.(D). Remove.the.wiring.harness.(E).from.the.hole.(F). Remove.the.driver's.seat.microswitch.(G).by.detaching.the.adhesive.(H). Assembly Assemble.the.components.in.the.reverse.order.of.disassembly.

  • Page 50: Troubleshooting

    ENGLISH DRIVE SYSTEM TROUBLESHOOTING OPEN CIRCUIT The.fuse.(F2).causes.an.open.in.the.circuit..This.system.allows.to.prevent.the.drive.system.motor.and.its.circuits.from.being. damaged.under.overload.conditions. If.there.is.an.open.in.the.circuit,.the.possible.causes.are: There.are.bulky.debris.or.cords.under.the.machine.or.around.the.driving.wheels.(remove.the.debris). The.motor.is.damaged.(check.the.motor.electrical.input). The floor gradient is excessive (do not use the drive system on slopes with a gradient exceeding the specifications). There.is.a.short.circuit.in.the.drive.system.electronic.board.wiring.harness.(repair). The.drive.system.electronic.board.is.faulty.(replace). The.parking.brake.is.faulty.(see.the.Parking.Brake.chapter). THE MACHINE DOES NOT MOVE Possible.causes: The.battery.voltage.is.too.low.(charge.the.battery). The forward/reverse gear pedal potentiometer is misadjusted or broken (adjust or replace).
  • Page 51 ENGLISH DRIVE SYSTEM TROUBLESHOOTING (Continues) DRIVE SYSTEM ELECTRONIC BOARD ERROR CODE TABLE LED CODES DESCRIPTION (REMEDY) LED flashing Note Reference pattern Broken.drive.system.electronic.board,.or.burned.drive.system.fuse.(FT),.or.disconnected.cable. LED.off (check.the.drive.system.electronic.board.wiring.harness). LED.on Control.system.operating;.no.failure.reported. Activated.thermal.protection.(wait.few.minutes.to.allow.the.electronic.board.to.cool.down..If.the. ¤ ¤ problem.persists,.check.the.drive.system.motor.electrical.input). ¤ ¤¤ Faulty.forward/reverse.gear.pedal.(check). ¤ ¤¤¤ Wrong.programming.of.drive.system.electronic.board.(replace). ¤ ¤¤¤¤ Voltage.too.low.(check.the.batteries). ¤ ¤¤¤¤¤ Voltage.too.high.(check.the.batteries).

  • Page 52: Other Systems

    ENGLISH OTHER SYSTEMS SCREW AND NUT TIGHTENING CHECK Drive.the.machine.to.the.appointed.disposal.area,.and.empty.the.recovery.water.tank.(58).with.the.hose.(22). Empty.the.solution.tank.(59).with.the.tap.(36). Drive the machine on a level floor. Turn.the.ignition.key.(12).to."0". Carefully.lift.the.tank.assembly.(60). Check: • Tightening.of.mounting.screws.and.nuts; • Correct.position.of.fasteners; • Visible.faults.in.the.components; • Leaks of fluids. Carefully.lower.the.tank.assembly.(60). Service Manual - CR 28 BOOST ®...

  • Page 53: Front.fairing.disassembly/Assembly

    ENGLISH OTHER SYSTEMS FRONT FAIRING DISASSEMBLY/ASSEMBLY Disassembly Drive.the.machine.to.the.appointed.disposal.area,.and.empty.the.recovery.water.tank.(58).with.the.hose.(22). Empty.the.solution.tank.(59).with.the.tap.(36). Drive the machine on a level floor. Turn.the.ignition.key.(12).to."0". Carefully.lift.the.tank.assembly.(60). Disconnect.the.battery.connector.(63). Remove the cover (A) (the cover is press-fitted). Remove.the.steering.wheel.nut.(B).and.recover.the.washer.(C). Remove.the.steering.wheel.(D). Remove.the.clamp.(E). Remove.the.screws.(F).and.slightly.lift.the.control.panel.(G).with.care. Disconnect.the.connectors.(H).and.recover.the.control.panel. Remove.the.steering.wheel.tilting.control.lever.support.screws.(I). Slightly.pull.the.lever.(J).upwards,.and.remove.the.support.(K). Disconnect.the.lever.(M).from.the.cable.terminal.(N). Remove.the.screws.(O). Lift.and.remove.the.fairing.(P). Assembly Assemble.the.components.in.the.reverse.order.of.disassembly. S301355 Service Manual - CR 28 BOOST ®...
  • Page 54 ENGLISH OTHER SYSTEMS FRONT FAIRING DISASSEMBLY/ASSEMBLY (continues) S301356 Service Manual - CR 28 BOOST ®...

  • Page 55: Electrical System

    ENGLISH ELECTRICAL SYSTEM MACHINE WORKING HOUR CHECK Turn.the.ignition.key.(A).to."I". In the first 5 seconds of machine operation, the display (B) shows the total number of working hours (scrubbing/drying) performed.by.the.machine. Turn.the.ignition.key.(A).to."0". HOUR COUNTER RESET PROCEDURE NOTE Perform this procedure only in case this cannot compromise warranties or scheduled maintenance intervals. Turn.the.ignition.key.(A).to."0".

  • Page 56: Battery.installation.and.battery.type.setting.(Wet.or.gel)

    ENGLISH ELECTRICAL SYSTEM BATTERY INSTALLATION AND BATTERY TYPE SETTING (WET OR GEL) According.to.the.type.of.batteries.(WET.or.GEL),.set.the.electronic.board.of.the.machine.and.of.the.battery.charger,.according.to. the.following.procedure: Machine setting Turn the ignition key (12) to “I” and pay attention to the following in the very first seconds of machine operation: • If the green warning light (7a) is flashing, the machine is set to GEL (compatible with AGM). •...

  • Page 57: Fuse.check/Replacement

    ENGLISH ELECTRICAL SYSTEM FUSE CHECK/REPLACEMENT Turn.the.ignition.key.(12).to."0". Remove.the.nuts.(93),.then.remove.the.cover.(92). Check/replace.the.following.fuse: • Drive.system.electronic.board.protection.fuse.(F2).(60.A).(96) Carefully.move.the.electronic.component.panel.(100).and.check/replace.the.following.fuses: • Low.power.circuit.protection.fuse.(F3).(5.A).(A) • Function.electronic.board.protection.fuse.(F1).(100.A).(B) Install.the.electrical.component.panel.(100).and.the.cover.(92),.then.tighten.the.nuts.(93). S301357 Service Manual - CR 28 BOOST ®...

  • Page 58: Drive.system.electronic.board.replacement

    ENGLISH ELECTRICAL SYSTEM DRIVE SYSTEM ELECTRONIC BOARD REPLACEMENT Disassembly Drive.the.machine.to.the.appointed.disposal.area,.and.empty.the.recovery.water.tank.(58).with.the.hose.(22). Empty.the.solution.tank.(59).with.the.tap.(36). Drive the machine on a level floor. Turn.the.ignition.key.(12).to."0". Carefully.lift.the.tank.assembly.(60). Disconnect.the.battery.connector.(63). Remove.the.nuts.(93),.then.remove.the.cover.(92). Slightly.move.the.electrical.component.panel.(100). Disconnect.the.connectors.(A).from.the.drive.system.electronic.board.(B). Remove.the.screws.(C). Remove.the.drive.system.electronic.board.(B). Assembly Assemble.the.components.in.the.reverse.order.of.disassembly. S301358 Service Manual - CR 28 BOOST ®...

  • Page 59: Function.electronic.board.replacement

    ENGLISH ELECTRICAL SYSTEM FUNCTION ELECTRONIC BOARD REPLACEMENT Disassembly Drive.the.machine.to.the.appointed.disposal.area,.and.empty.the.recovery.water.tank.(58).with.the.hose.(22). Empty.the.solution.tank.(59).with.the.tap.(36). Drive the machine on a level floor. Turn.the.ignition.key.(12).to."0". Carefully.lift.the.tank.assembly.(60). Disconnect.the.battery.connector.(63). Remove.the.nuts.(93),.then.remove.the.cover.(92). Slightly.move.the.electrical.component.panel.(A). Disconnect.the.connectors.(B).of.the.function.electronic.board.(C). Disconnect.the.lead-in.wires.(D). Remove.the.screws.(E). Remove.the.function.electronic.board.(C). Assembly Assemble.the.components.in.the.reverse.order.of.disassembly. S301359 Service Manual - CR 28 BOOST ®...

  • Page 60: Dashboard.electronic.board.replacement

    ENGLISH ELECTRICAL SYSTEM DASHBOARD ELECTRONIC BOARD REPLACEMENT Disassembly Drive.the.machine.to.the.appointed.disposal.area,.and.empty.the.recovery.water.tank.(58).with.the.hose.(22). Empty.the.solution.tank.(59).with.the.tap.(36). Drive the machine on a level floor. Turn.the.ignition.key.(12).to."0". Carefully.lift.the.tank.assembly.(60). Disconnect.the.battery.connector.(63). Remove.the.mounting.screws,.then.slightly.lift.the.control.panel.(1). Disconnect.the.connectors.(A).of.the.dashboard.electronic.board.(B). Remove.the.dashboard.electronic.board.(B).by.disengaging.the.fasteners.(E). Assembly Assemble.the.components.in.the.reverse.order.of.disassembly. S301360 Service Manual - CR 28 BOOST ®...

  • Page 61: Troubleshooting

    ENGLISH ELECTRICAL SYSTEM TROUBLESHOOTING See.the.previous.chapters.related.to.the.use.of.the.electrical.system. Other.possible.causes: The batteries are discharged or the connections are not efficient (charge the batteries or clean the connections). The.batteries.are.broken.(check.the.battery.no-load.voltage). NOTE A fault in the battery charger and relevant connections can affect the machine operation. The.battery.charger.is.broken.(replace). There.is.an.open.in.the.fuses.(replace).
  • Page 62 ENGLISH ELECTRICAL SYSTEM TROUBLESHOOTING (continues) FUNCTION ELECTRONIC BOARD ERROR CODE TABLE Electronic board Flashing pattern Meaning Possible causes Lock Reset LEDs Power.supplied. Green.LED.(102) Always.on electronic.board Mechanical.obstacle.to.the.deck.actuator. movement,.or.faulty.deck.actuator,.or. Deck.actuator.time- Slow flashing open.in.the.deck.actuator.cable.(check. None By.switch.(4) the.connections),.or.broken.deck.actuator. Red.LED.(upper). microswitch.(replace.the.actuator). (101) Open.in.the.deck.actuator.cable.(check. Abnormal.reading.of. By.ignition. Fast flashing the.connections),.or.broken.deck.actuator.
  • Page 63 ENGLISH ELECTRICAL SYSTEM TROUBLESHOOTING (Continues) FUNCTION ELECTRONIC BOARD ERROR CODE TABLE Electronic board Flashing pattern Meaning Possible causes Lock Reset LEDs Probe.1. All.except. By.ignition. 9 flashes overtemperature Out * Faulty.cooling.fan.(check.M9),.or.too. heavy.working.conditions.(let.the.machine. cool.down),.or.faulty.function.electronic. Probe.2. All.except. By.ignition. board.(replace). 10 flashes overtemperature Out * False.contact.from.ignition.key.circuit.
  • Page 64 ENGLISH ELECTRICAL SYSTEM TROUBLESHOOTING (Continues) FUNCTION ELECTRONIC BOARD CONNECTION REFERENCE Connectors Key: Dashboard.inputs/outputs Auxiliary.inputs/outputs.1 Auxiliary.inputs/outputs.2 Brush.deck.actuator Electronic board Description Reference voltage in/out Logical.power.from.key.(+) 24.V Dashboard.power.supply.(-) Out(**) Return.from.brush.deck.lifting/lowering.switch Indef.(0.V) Return.from.extra.pressure.switch Indef.(0.V) Return.from.vacuum.system.on/off.switch Indef.(0.V) Brush.deck.lifting/lowering.switch.LED.power.supply.(LED1) Indef.(0.V) Extra.pressure.function.switch.LED.power.supply Indef.(0.V) Vacuum.system.on/off.switch.LED.power.supply Indef.(0.V) Battery.GREEN.LED.power.supply Indef.(0.V) Battery.YELLOW.LED.power.supply Indef.(0.V) Out(**)
  • Page 65 ENGLISH ELECTRICAL SYSTEM Connectors (Continues) Electronic board Description Reference voltage in/out Auxiliary.power.supply.(+) 24.V Out(**) Auxiliary.power.supply.(+) 24.V Out(**) Auxiliary.power.supply.(-) Out(**) Input.from.machine.moving.signal Indef.(0.V) Input.from.reverse.gear.signal Indef (0 V)(*) Cylindrical.brush.deck.enabling.input Indef.(0.V) Drive.system.inhibition.output Indef.(0.V) Out(**) Horn.output Indef.(0.V) Out(**) Electronic board Description Reference voltage in/out Deck jack power supply Indef Deck jack power supply Indef...

  • Page 66: Component.layout

    ENGLISH ELECTRICAL SYSTEM COMPONENT LAYOUT 24.V.batteries Flashing.light Electromagnetic.brake Reverse.gear.warning.buzzer/horn Battery.connector Battery.charger.auxiliary.connector Battery.charger.external.vent.auxiliary.connector Battery.charger BOOST .deck.connector ® Deck.sub-connector Function.electronic.board Drive.system.electronic.board Electronic.board.(under.control.panel) EB3/2 Electronic.board.(under.control.panel).(optional) Solenoid.valve Function.electronic.board.fuse Drive.system.electronic.board.fuse Low.power.circuit.fuse Pump.fuse.(optional) Ignition.switch Drive.system.electronic.board.diagnostic.LED Left.brush.motor Right.brush.motor.(if.equipped) Vacuum.system.motor BOOST .deck.actuator ® Drive.system.motor Squeegee.actuator Washing.water.pump.(optional) Detergent.pump.(optional) Cooling.fan Washing.water.level.sensor Working.speed.potentiometer.(if.equipped) Speed.potentiometer.(pedal)
  • Page 67 ENGLISH ELECTRICAL SYSTEM COMPONENT LAYOUT (continues) EB3-2 S301651C Service Manual - CR 28 BOOST ®...
  • Page 68 ENGLISH ELECTRICAL SYSTEM COMPONENT LAYOUT (continues) S301362C Service Manual - CR 28 BOOST ®...

  • Page 69: Wiring.diagram

    ENGLISH ELECTRICAL SYSTEM WIRING SYSTEM Color code 24.V.batteries Black Flashing.light Blue Electromagnetic.brake Brown Reverse.gear.warning.buzzer/horn Green Battery.connector Gray Battery.charger.auxiliary.connector Orange Battery.charger.external.vent.auxiliary.connector Pink Battery.charger BOOST .deck.connector Violet ® Deck.sub-connector White Function.electronic.board Yellow Drive.system.electronic.board Electronic.board.(under.control.panel) EB3/2 Electronic.board.(under.control.panel).(optional) Solenoid.valve Function.electronic.board.fuse Drive.system.electronic.board.fuse Low.power.circuit.fuse Pump.fuse.(optional) Ignition.switch Drive.system.electronic.board.diagnostic.LED Left.brush.motor Right.brush.motor.(if.equipped)
  • Page 70 ENGLISH ELECTRICAL SYSTEM WIRING SYSTEM (continues) S311379A Service Manual - CR 28 BOOST ®...
  • Page 71 Michigan 48071-0158 29815 John R. ALTO Cleaning Systems (UK) Ltd., Penrith (810) 544-6300 Gilwilly Industrial Estate Penrith American Lincoln / Clarke, Marietta, Georgia 30066 ® Cumbria CA11 9BN 1455 Canton Road +44 1768 868 995 (770) 973-5225 ALTO France S.A. Strasbourg B.P.
  • Page 72 STATED WARRANTIES ARE IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED Clarke's liability under this warranty is limited to repair of the product and/or replacement of parts and is given to purchaser in lieu of all other remedies, including INCIDENTAL AND CONSEQUENTIAL DAMAGES.

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