Hyster-Yale Electric Pallet Truck MPW050-EN24T2250

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.

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.

When experiencing problems with the hydraulic functions, the controller may not be at fault. ALWAYS troubleshoot to verify the component(s) at fault before replacing the controller. Refer to the section ZAPITM Controllers 2200YRM1064, ZAPITM Controllers 2200YRM1006, or ZAPITM Controllers 2200YRM1067 for your lift truck for additional information on the ZAPITM display and for information on troubleshooting fault codes, adjusting parameters, and testing the ZAPITM motor controller.

1. Move lift truck to a safe, level area.

NOTE: Some new controllers may have software upgrades which will not allow previous controller parameters and settings to be transferred.

2. If possible, prior to replacing the controller, note all special customer parameters and settings.

3. Turn the key switch to the OFF position.

4. Disconnect and separate the battery connectors.

5. Block drive tire to prevent movement. See the section Periodic Maintenance 8000YRM1048, Periodic Maintenance 8000YRM1009, or Periodic Maintenance 8000YRM1379 for your lift truck.

NOTE: If removing the entire control panel assembly to include the electrical panel plate, it will be necessary to perform Step 6. If only removing the controller, contactor, horn, fuses, or wires, it is not necessary to perform Step 6. See Figure 6 or Figure 7.

The reservoir of the hydraulic pump unit can be removed without removing the complete hydraulic unit.

The motor will also come loose, with one set of screws holding the reservoir to the subunit to the motor.

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.

NOTE: The reservoir must be lowered below the suction tube before attempting to move the reservoir away from the lift truck. Remember the reservoir may contain hydraulic oil. Dispose of all used oil in accordance with local regulations.

1. Move the key to the OFF position. Disconnect the battery.

2. Remove the drive unit compartment cover.

3. Discharge the capacitor in the transistor controller.

Warning: This procedure requires trained personnel with PPE!

If brushes are not worn out, skip the replacement procedure

Brushes move easily in its holder?

If brushes do not move easily, a new set of brushes must be installed.

Note the arrangement and connections of the brush assembly

Brush holders free from burns and damage?

Brush holders fastened tightly to brush mounting plate?

New brushes move freely and smoothly in brush holders?