Hyster-Yale Pallet Truck MPB040EN

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.

Adhere to the following precautionary steps to ensure that the hydraulic system remains clean.

1. Flush the entire system when a failure is encountered to make sure all paint, metal chips, welding shot, and debris are removed.

2. Filter each change of oil to prevent the introduction of contaminants into the system.

3. Provide continuous protection from airborne contamination by keeping the breather clean and serviceable.;

WARNING: DO NOT make repairs or adjustments unless you have been properly trained and authorized to do so.

Always wear the proper protective equipment including eye protection and petroleum resistant gloves when servicing hydraulic components.

Completely lower all lift components and relieve pressure before disassembling any part of the lift pump or disconnecting any hydraulic hoses.

The hydraulic oil is hot at normal operating temperatures. Be careful when draining the oil.

Never put your hands on pressurized hydraulic components. Pressurized hydraulic oil escaping through pin-hole leaks can be injected into the skin.

CAUTION: DO NOT OVERFILL. Oil will leak from the breather/ filler cap if too full.

NOTE: Check the hydraulic oil level in the reservoir when oil is at room temperature.

Forks completely lowered to relieve pressure from hydraulic circuit?

1. Remove the hydraulic unit from the lift truck. Refer to the Hydraulic Unit in this section.

2. Clean the reservoir and pump area to prevent contaminants from entering the hydraulic system.

3. Remove the capscrews retaining the reservoir to the hydraulic unit. Tap around the perimeter to break the seal and separate the reservoir from the motor assembly.

4. Remove the spring retaining screw from the suction tube.

5. Remove the suction tube and strainer by pulling down and out.

6. Remove the four capscrews retaining the pump to the drive motor.

7. Disassemble the pump assembly and coupling from the adapter.

WARNING: Put blocks under each fork. Position blocks on both sides of the drive wheel. The blocks must prevent the lift truck from falling and causing personal injury or damage.

WARNING: Be careful when removing or installing snap rings. The snap rings can come loose during removal or installation with enough force to cause a personal injury. Always use the correct snap ring pliers, and wear eye and face protection during removal and installation.

Raise the motorized lift truck forks/platform to one half its maximum height.

Place blocks under the forks. Block the drive wheel.

Remove the drive unit compartment cover.

Manually collapse the piston into the cylinder while depressing the lower switch.

Relieve pressure from the hydraulic cylinder.

Drive the roll pin retaining the top clevis pin out of the frame and clevis pin. Remove the top clevis pin.