Hyster Forklift RS45-24IH

NOTE: The relief valves in the main manifold, main control valve, and flow amplifier are adjustable. If a relief pressure is not within specifications, adjust the relief valve.

Upload a photo of the gauge connected to the check port

Enter the temperature of hydraulic oil

Is the pressure gauge according to the specifications shown in Table 3?

To adjust a relief valve setting, remove cap. Loosen lock nut and use an Allen wrench to turn adjuster screw. Turn adjuster screw clockwise to increase pressure.

To lower pressure, first lower pressure below required value by turning adjuster screw counterclockwise and then increase pressure to required level. When relief pressure is correct, tighten lock nut and install cap.

Is the relief pressure correct after tightening the lock nut?

Sign off on the relief valve check

!WARNING: Cleaning solvents can be flammable and toxic and can cause skin irritation. When using cleaning solvents, always follow the solvent manufacturer’s recommended safety precautions.

Compressed air can move particles and cause injury to the user or to other personnel. Verify compressed air path is away from all personnel. Wear eye protection.

Clean cartridge valve in solvent and carefully dry the parts with compressed air.

Inspect the bores for damage. If there are scratches or other damage, the load holding valve must be replaced.

Inspect the fittings, O-rings, and check valves for damage. Replace damaged parts.

Sign off on the Derricking Circuit Maintenance

!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. This procedure will make sure that the boom cannot lower suddenly and cause injury or death.

Place the truck on a solid and level surface.

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

Remove covers on the topside of the frame.

NOTE: The pump assembly has two suction hoses and two high-pressure lines.

NOTE: When disconnecting the suction hose at the variable displacement pump, raise hose quickly and install a plug to avoid leakage from the hose.

Disconnect suction hose at the variable displacement pump.

Disconnect high-pressure line at the outlet port on the pump side of the variable displacement pump. Raise the end of the line above hydraulic tank platform until a plug is installed in the line.

!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.