Hyster-Yale Hyster-Yale Electric Pallet Truck MPW050-EN24T2260 MPW050-EN24T2260

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.

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

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

WARNING: Batteries are heavy and can cause personal injury. Use care to avoid injury. DO NOT put hands, arms, feet, and/or legs between the battery and a solid object. Make sure the capacity of the crane and spreader bar is greater than the weight of the battery. The weight of the battery is normally shown on the battery case. The maximum battery weight is shown on the lift truck nameplate. The spreader bar must NOT be made of metal or it must have insulated straps.

WARNING: Put blocks under each side of the truck under the drive unit frame. Position blocks on both sides of the load wheels. The blocks must prevent the lift truck from falling and causing personal injury or property damage.

WARNING: The capacitor in the transistor controller can hold an electrical charge after the battery is disconnected. To prevent electrical shock and personal injury, discharge the capacitor before inspecting or repairing any component in the drive unit compartment. Wear safety glasses. Make certain the battery has been disconnected. Refer to the section Steering Mechanism 1600 YRM 1004.

CAUTION: Make certain the hydraulic cylinder is fully collapsed.

Remove the drive unit compartment cover.

Disconnect the battery. Use a spreader bar and lifting device to remove the battery. DO NOT allow the battery move from side to side. Make sure the battery cables have clearance.

Raise the drive wheel off the floor and put blocks under both sides of the drive unit frame.

Drain the hydraulic oil from the hydraulic unit into an appropriate container.

Tag and disconnect all of the electrical wires from the hydraulic unit.

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.