Relief Valve (Swing) - Test and Adjust
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325C Excavator Hydraulic System
[RENR5365]
325C Excavator Hydraulic System
Relief Valve (Crossover) - Test and Adjust
325C Excavator Hydraulic System
Main Pump (Flow) - Test - Constant Horsepower Flow Control
HYDRAULIC SYSTEM
VALVE GP-RELIEF
365B Excavators Hydraulic System
Machine Drift on a Slope - Check
325C Excavator Hydraulic System
Relief Valve (Line) - Test and Adjust
325C Excavator Hydraulic System
Relief Valve (Main) - Test and Adjust
325C Excavator Hydraulic System
Relief Valve (Crossover) - Test and Adjust
325C Excavator Hydraulic System
Relief Valve (Swing) - Test and Adjust
- Position the machine on level ground.
- Stop the engine.
- Release the pressure in the hydraulic system. Refer to Testing and Adjusting, "Hydraulic System Pressure - Release".
- Connect a 60000 kPa (8700 psi) pressure gauge to pressure tap (2) .
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| Illustration 1 | g00816997 |
Pump compartment (1) Pressure tap (right pump delivery pressure) (2) Pressure tap (left pump delivery pressure) (3) Pressure tap (power shift pressure) | |
- Disconnect connector (4) from solenoid valve (5) for the swing parking brake.
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| Illustration 2 | g01678554 |
Pilot oil manifold (4) Connector (5) Solenoid valve for the swing parking brake | |
- Start the engine.
- Place the machine controls at the following settings: engine speed dial "10" and AEC switch OFF.
ReferenceRefer to Testing and Adjusting, "Engine Performance - Test (Engine Speed)" for engine rpm settings.
- Move the swing joystick slowly and ensure that the swing parking brake is operating properly.
- Slowly move the swing joystick for a full SWING RIGHT operation and check the pressure for relief valve (8) at pressure tap (2) .
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| Illustration 3 | g01678556 |
Swing motor (6) Adjustment plug (7) Locknut (8) Relief valve (right swing) (9) Adjustment plug (10) Locknut (11) Relief valve (left swing) | |
- Return the swing joystick to the NEUTRAL position.
- The pressure setting of the swing relief valve is 29400 ± 1000 kPa (4264 ± 145 psi). If the pressure reading at pressure tap (2) is not within the specification, adjust the swing relief valve.
- In order to adjust the swing relief valve, loosen locknut (7) . Turn adjustment plug (6) until the pressure gauge reading at pressure tap (2) is 29400 ± 1000 kPa (4264 ± 145 psi).
Note: Turning adjustment plug (6) clockwise increases the pressure. Turning adjustment plug (6) counterclockwise decreases the pressure.
Note: Always make final pressure adjustments on pressure rise.
- Tighten locknut (7) to a torque of 117 ± 10 N·m (85 ± 7 lb ft).
- Slowly move the swing joystick for a full SWING LEFT operation and check the pressure for relief valve (11) at pressure tap (2) .
- Return the swing joystick to the NEUTRAL position.
- The pressure setting of the swing relief valve is 29400 ± 1000 kPa (4264 ± 145 psi). If the pressure reading at pressure tap (2) is not within the specification, adjust the swing relief valve.
- In order to adjust the swing relief valve, loosen locknut (10) . Turn adjustment plug (9) until the pressure gauge reading at pressure tap (2) is 29400 ± 1000 kPa (4264 ± 145 psi).
Note: Turning adjustment plug (9) clockwise increases the pressure. Turning adjustment plug (9) counterclockwise decreases the pressure.
Note: Always make final pressure adjustments on pressure rise.
- Tighten locknut (10) to a torque of 117 ± 10 N·m (85 ± 7 lb ft).
- After completing the test and/or the adjustment procedures for the swing relief valves, stop the engine.
- Release the pressure in the hydraulic system. Refer to Testing and Adjusting, "Hydraulic System Pressure - Release".
- Connect connector (4) to the solenoid valve for swing parking brake (5) .
Information System:
325C Excavator
Specifications
325C Excavator Hydraulic System
Relief Valve (Crossover) - Test and Adjust
325C Excavator Hydraulic System
Relief Valve (Main) - Test and Adjust
325C Excavator Hydraulic System
Relief Valve (Pilot) - Test and Adjust
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Main Hydraulic Pump - Install
325C Excavator Hydraulic System
Specifications
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Cylinder Speed - Check
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Cylinder Drift - Check - Loaded Bucket
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Swing Speed and Swing Drift on a Slope - Check
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2001/09/10
Special Instruction, REHS0932, "Procedure to Rework the Return Lines for the Margin Relief Valve" Lists Two Incorrect Part Numbers {0374, 5057, 5069}
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