Usage:
NOTE: The solenoid valves are located behind the right rear access door. The removal and installation procedure for all solenoid valves is the same.
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At operating temperature, the hydraulic oil tank is hot and under pressure. Hot oil can cause burns. To prevent possible personal injury, release the pressure in the implement hydraulic circuits (boom, stick and bucket) before any hydraulic lines or components are disconnected or removed. |
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- a. Fully retract the rod in the stick cylinder.
- b. Adjust the position of the bucket so it will be flat on the ground when the boom is lowered.
- c. Lower the boom until the bucket is flat on the ground.
- d. Shut off the engine, and put the hydraulic activation control lever in the "Lock" position.
- e. Move the control levers for the boom, bucket, stick and swing through their full travel strokes. This will relieve any pressure that may be present in the pilot system.
- f. Slowly loosen the air breather cap on the hydraulic oil tank to release the pressure.
- g. Tighten the air breather cap on the hydraulic oil tank.
- h. The pressure in the hydraulic system has now been released. Lines and components can now be removed.
- b. Adjust the position of the bucket so it will be flat on the ground when the boom is lowered.
1. Release the pressure in the hydraulic system as follows:
2. Disconnect wiring harness (3). Disconnect two hose assemblies (1) from the valve.
3. Remove two socket head bolts (2) that hold solenoid valve (4) to the pilot manifold. Remove the solenoid valve. Remove the two O-ring seals from the body of the valve.
NOTE: Install the solenoid valve in the reverse order of removal. Prior to installing the valve, check the condition of the two O-ring seals used in the valve body. If the seals are worn or damaged, use new parts for replacement. Tighten the two socket head bolts that hold the solenoid valve to a torque of 9 ± 1 N·m (7 ± 1 lb ft).
4. Check the oil level in the hydraulic oil tank. Fill the hydraulic oil tank with oil to the correct level. See the Operation & Maintenance Manual for the correct filling procedure.
Disassemble & Assemble Solenoid Valves
Start By:
a. remove solenoid valves
1. Be sure the solenoid valves are thoroughly clean prior to disassembly.
2. Remove two O-ring (9) from the solenoid body.
3. Remove four socket head bolts (8) and solenoid assembly (7) from solenoid body (2). Remove O-ring seal (1) from the solenoid assembly.
4. Remove plug (6), spring (4) and spool (3) from solenoid body (2). Remove O-ring seal (5) from plug (6).
NOTE: Assemble the solenoid valve in the reverse order of disassembly. Prior to assembling the solenoid valve, be sure all parts of the valve are clean and free of dirt and debris. Put clean hydraulic oil on the internal parts of the valve. Also, check the condition of the O-ring seals. If the seals are worn or damaged, use new parts for replacement. Tighten plug (6) to a torque of 20 ± 2 N·m (15 ± 1 lb ft). Tighten socket head bolts (8) torque 4 ± 1 N·m (3 ± 1 lb ft).
End By:
a. install solenoid valves