Hyster-Yale Electric Pallet Truck MSW030-F

NOTE: On some models, the dash indicator will display the code: EP 107 (or a higher number) for 1 to 2 seconds every time the key switch is turned to the ON position. This code represents the EEPROM software version and DOES NOT INDICATE A FAULT CODE.

NOTE: These checks require a volt-ohmmeter. Specific checks require additional equipment.

NOTE: The correct meter polarity is necessary for the checks. The voltage checks are made between the individual points and battery negative. Connect the meter negative to battery negative.

Block lift truck so the drive wheels are off the floor. See the section Periodic Maintenance 8000YRM1048, Periodic Maintenance 8000YRM1009, or Periodic Maintenance 8000YRM1379 lift trucks. Refer to How to Put a Lift Truck on Blocks.

Turn the key switch to the OFF position.

Disconnect and separate the battery connectors.

Remove the upper drive unit compartment cover.

Remove the lower drive unit compartment cover.

Discharge the capacitor. See Special Precautions.

Warning: This procedure requires trained personnel with PPE!

Move lift truck to a safe, level area

Block drive tire to prevent movement

Turn the key switch to the OFF position and disconnect battery connectors

Remove the upper drive unit compartment cover

Tag, identify, and disconnect the wires and cables

Disconnect all wires and cables from the contactor

Loosen two mounting screws and lockwashers that hold contactor to plate and remove contactor

A proximity switch is used to sense the position of the control handle arm. A target, cast into the base of the control handle arm moves in front of the proximity switch when the handle is in the RUN position, activating the switch and sending a signal to the ZAPITM Controller. A red LED on the switch illuminates when the target is sensed. Refer to Brakes 1800YRM1005.

Check the proximity switch for proper operation. All connections must be attached. Take voltage readings from the back of the connector.

1. Move the lift truck to a safe, level area before performing any repairs.

2. Turn the key switch to the OFF position.

3. Remove the upper drive unit compartment cover.

4. Remove the lower drive unit compartment cover.

5. Remove the four capscrews from the two-piece shield over the MDU and remove the shields.

1. Turn the key switch to the OFF position and disconnect battery.

2. Remove the upper drive unit compartment cover.

3. Discharge the capacitor. See Special Precautions in this section.

4. Disconnect the wire harness plug from the back of the display. Locking tab is hidden underneath rubber boot.

5. Remove nuts and washers holding retaining bracket. Remove bracket and gauge from control panel.

1. Install gauge in control panel.

2. Install retaining bracket, washers, and nuts. Tighten nuts.

CAUTION: The pinion end cover and the armature are heavy components. Work carefully so the field coils, pole pieces, and armature are not damaged during disassembly and assembly.

Remove the traction motor and brake assembly from the MDU

Clean outside surfaces of motor before disassembly

Make index marks on the ends of the motor and field ring to ensure proper reassembly

Measure the brush in the brush holder

Remove capscrews from commutator end of motor

Carefully slide end cover from motor and armature shaft

Remove screws that fasten pinion end cover to field ring