Hyster Forklift RS45-28IH

Lower boom completely and close shutoff valves on the bottom of the hydraulic tank.

Shut down the engine and apply the parking brake.

Apply brakes minimum 10 times to relieve hydraulic pressure.

Loosen the brake filter by using a wrench to turn the bowl counterclockwise. See Figure 12.

Install the bowl by turning the bowl clockwise.

Torque the bowl to 20 N•m (14.7 lbf ft).

!NOTE: Never remove the safety stand pipe to avoid dirt from entering the hydraulic system.

Engine shut down and parking brake applied

Yellow button on the indicator pressed to release pressure

Cap loosened by turning counterclockwise

Inside of the housing cleaned with solvent

Cap installed by turning clockwise

Engine started and operation of indicator checked

Warning: Lower boom completely before working on control valve or hydraulic system. The boom can lower suddenly and cause injury if the boom is not lowered.

Is the truck placed on a solid and level surface?

Is the boom lowered and the shutoff valves at the bottom of the hydraulic tank platform closed?

Warning: Move all control levers back and forth a minimum of 20 times to remove all hydraulic pressure from pilot system.

Are the covers on the topside of the frame removed?

Are tags for identification put on hydraulic lines?

Are the hydraulic lines disconnected from the cab manifold?

Are caps put on the open lines, ports or other connectors?

NOTE: The pressure reducer valve is adjustable. If a setting pressure is not within specifications, adjust the valve.

Lower lift cylinders completely

Connect a 0 to 7 MPa (0 to 1015 psi) gauge to check port MPLT

Run engine until temperature of hydraulic oil is 55 to 65 C (130 to 150 F)

NOTE: Correct measurement can be achieved during movement (flow) of the main spool.

Check if pressure is 5 MPa (725 psi)

If pressure is not correct, adjust pressure reducer valve

!WARNING: Lower boom completely before working on control valve or hydraulic system. The boom can lower suddenly and cause injury if the boom is not lowered. This procedure will make sure that the boom cannot lower suddenly and cause injury or death.

!NOTE: All valves, and other associated items installed on the load holding valve can be replaced. Before removal of any part, check that the area is clean and protected against dirt and fluid contamination.

Place the truck on a solid and level surface.

Lower boom and close the shutoff valves at the bottom of the hydraulic tank platform.

!WARNING: Move all control levers back and forth a minimum of 20 times to remove all hydraulic pressure from pilot system.

Put tags for identification on electrical wires. Disconnect the electrical wires from the load holding valve.

Put tags for identification on hydraulic lines. Disconnect the hydraulic lines from the load holding valve. Put caps on the open lines, ports or other connectors.

Remove the four capscrews that fasten the load holding valve to the rear side of the outer boom.