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    Relief Valve (Swing) - Test and Adjust: SMCS - 5454-036

    Uploaded by

    Steven Manuputty
    This document provides instructions for testing and adjusting the relief valves on the swing function of an excavator. The procedure involves using a pressure gauge to check the pressure settings of the left and right swing relief valves and adjusting them if needed to ensure the pressure is within the specified range of 26000 ± 980 kPa. Connections to the hydraulic system and pilot oil manifold are also described to facilitate accessing the relief valves and monitoring pressure.

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    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd

    Relief Valve (Swing) - Test and Adjust: SMCS - 5454-036

    Uploaded by

    Steven Manuputty
    85 views4 pages
    This document provides instructions for testing and adjusting the relief valves on the swing function of an excavator. The procedure involves using a pressure gauge to check the pressure settings of the left and right swing relief valves and adjusting them if needed to ensure the pressure is within the specified range of 26000 ± 980 kPa. Connections to the hydraulic system and pilot oil manifold are also described to facilitate accessing the relief valves and monitoring pressure.

    Original Description:

    Original Title

    Relief valve swing adjust

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    This document provides instructions for testing and adjusting the relief valves on the swing function of an excavator. The procedure involves using a pressure gauge to check the pressure settings of the left and right swing relief valves and adjusting them if needed to ensure the pressure is within the specified range of 26000 ± 980 kPa. Connections to the hydraulic system and pilot oil manifold are also described to facilitate accessing the relief valves and monitoring pressure.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    85 views4 pages

    Relief Valve (Swing) - Test and Adjust: SMCS - 5454-036

    Uploaded by

    Steven Manuputty
    This document provides instructions for testing and adjusting the relief valves on the swing function of an excavator. The procedure involves using a pressure gauge to check the pressure settings of the left and right swing relief valves and adjusting them if needed to ensure the pressure is within the specified range of 26000 ± 980 kPa. Connections to the hydraulic system and pilot oil manifold are also described to facilitate accessing the relief valves and monitoring pressure.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    of 4

    320C & 320C L Excavators GNG00001-UP (MACHINE) POWERED BY 3066 Engine(...

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    Relief Valve (Swing) - Test and Adjust


    SMCS - 5454-036

    Table 1

    Required Tools
    Part Number Description Qty
    Pressure Gauge (
    8T-0861 1
    60000 kPa (8700 psi))

    1. Position the machine on level ground.

    2. Stop the engine.

    3. Release the pressure in the hydraulic system. Refer to Testing And Adjusting, "Hydraulic System
    Pressure - Release".
    320C & 320C L Excavators GNG00001-UP (MACHINE) POWERED BY 3066 Engine(... Page 2 of 4

    Illustration 1 g00666193
    Pump compartment

    (1) Pressure tap (right pump delivery pressure)

    (2) Pressure tap (left pump delivery pressure)

    (3) Pressure tap (power shift pressure)

    4. Connect a 60000 kPa (8700 psi) pressure gauge to pressure tap (2) .

    Illustration 2 g00668854
    Pilot oil manifold

    (28) Connector

    (29) Swing parking brake solenoid valve

    5. Disconnect connector (28) from swing parking brake solenoid valve (29) .

    6. Start the engine.

    7. Place the machine controls at the following settings: engine speed dial "10" and AEC switch OFF.

    Reference: Refer to Testing And Adjusting, "Engine Performance - Test" for engine rpm settings.

    8. Move the swing joystick slowly and ensure that the swing parking brake is operating properly.
    320C & 320C L Excavators GNG00001-UP (MACHINE) POWERED BY 3066 Engine(... Page 3 of 4

    Illustration 3 g00668848
    Swing motor

    (22) Adjustment plug

    (23) Locknut

    (24) Relief valve (left swing)

    (25) Relief valve (right swing)

    (26) Adjustment plug

    (27) Locknut

    9. Slowly move the swing joystick for a full SWING RIGHT operation and check the pressure for
    relief valve (25) at pressure tap (2) .

    10. Return the swing joystick to the NEUTRAL position.

    11. The pressure setting of the swing relief valve is 26000 ± 980 kPa (3750 ± 140 psi). If the pressure
    reading at pressure tap (2) is not within the specification, adjust the swing relief valve.

    12. In order to adjust the swing relief valve, loosen locknut (23). Turn adjustment plug (22) until the
    pressure gauge reading at pressure tap (2) is 26000 ± 980 kPa (3750 ± 140 psi).

    Note: Turning adjustment plug (22) clockwise increases the pressure. Turning adjustment plug
    (22) counterclockwise decreases the pressure.

    Note: Always make final pressure adjustments on pressure rise.

    13. Tighten locknut (23) to a torque of 117 ± 10 N·m (85 ± 7 lb ft).

    14. Slowly move the swing joystick for a full SWING LEFT operation and check the pressure for
    relief valve (24) at pressure tap (2) .

    15. Return the swing joystick to the NEUTRAL position.


    320C & 320C L Excavators GNG00001-UP (MACHINE) POWERED BY 3066 Engine(... Page 4 of 4

    16. The pressure setting of the swing relief valve is 26000 ± 980 kPa (3750 ± 140 psi). If the pressure
    reading at pressure tap (2) is not within the specification, adjust the swing relief valve.

    17. In order to adjust the swing relief valve, loosen locknut (27). Turn adjustment plug (26) until the
    pressure gauge reading at pressure tap (2) is 26000 ± 980 kPa (3750 ± 140 psi).

    Note: Turning adjustment plug (26) clockwise increases the pressure. Turning adjustment plug
    (26) counterclockwise decreases the pressure.

    Note: Always make final pressure adjustments on pressure rise.

    18. Tighten locknut (27) to a torque of 117 ± 10 N·m (85 ± 7 lb ft).

    19. After completing the test and/or the adjustment procedures for the swing relief valves, stop the
    engine.

    20. Release the pressure in the hydraulic system. Refer to Testing And Adjusting, "Hydraulic System
    Pressure - Release".

    21. Connect connector (28) to the solenoid valve for swing parking brake (29) .

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