R1600G Load Haul Dump Parking Brake Manual Release Caterpillar


Parking Brake Manual Release
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R1600G Load Haul Dump [SEBU7337]
BRAKING SYSTEM
BRAKE GP
R1600G Load Haul Dump Brake Release - If Equipped
R1600G Load Haul Dump Parking Brake Manual Release

------ WARNING! ------

Personal injury or death can result from a brake malfunction. Do not operate the machine if the brake was applied due to a malfunction of the oil system or the brake.

Correct any problem before attempting to operate the machine.

----------------------

Note: Certain AVSpare machines may be equipped with the optional transmission oil pressure switch for brake application. If your machine is equipped with the optional pressure switch, a loop wire needs to be connected to the wiring harness to enable the brake release function to operate.

ReferenceFor further information on the transmission oil pressure switch for brake application refer to Systems Operation, Testing and Adjusting, "Parking Brake (Automatic Function)" for the machine that is being serviced.




    Illustration 1g00942987

    Location of the transmission oil pressure switch

    (1) Transmission oil pressure switch for brake application

    (2) Loop wire

    Note: Perform Step 1 and Step 16 of the following procedure only to machines fitted with transmission oil pressure switch for brake application (1) .

  1. Disconnect the transmission wiring harness from transmission oil pressure switch (1) at the wiring connector. Connect loop wire (2) between the EL331 blue wire and the EL330 grey wire of the transmission harness, as shown.



    Illustration 2g00909742

    Portable hydraulic pump

    (3) Plug

  1. Connect plug (3) of the 212-6102 Portable Hydraulic Pump to the machine's 24 volt DC power supply.

    Note: The machine batteries must be fully charged for the operation of the portable hydraulic pump. If battery charge is low, connect to an external 24 volt DC power supply.

  1. Depress the service brake pedal at least 80 times to release the oil pressure from the brake hydraulic system.

  1. Move the joystick control lever several times through the full range of travel to release any pressure in the implement pilot circuits.

  1. Move the STIC steering control several times in both directions to release any pressure in the steering hydraulic system.

  1. Press and hold the breaker relief valve to release any pressure in the hydraulic tank.



    Illustration 3g00942989



    Illustration 4g00942993

  1. Remove the caps from quick connect couplers (4) and (5). Connect the hydraulic hoses from the portable hydraulic pump to quick connect couplers (4) and (5) .

  1. Turn the battery disconnect switch to the ON position.

  1. Turn the engine start switch to the ON position.



    Illustration 5g00909759

  1. Position brake release switch (6) (from the portable hydraulic pump) inside the operator's station.



    Illustration 6g00942998

  1. Press and hold brake release switch (6) in the ON position to activate the portable hydraulic pump. Brake accumulator oil pressure indicator (8) will go out when the braking system has full oil pressure.

    Note: Operation of the brake release switch should only take place from inside the operator's station. Observe brake indicators and gauges (if equipped) while operating the portable hydraulic pump.

  1. When the braking system has full oil pressure, move parking brake control (9) to the OFF position to disengage the parking brake. Hold brake release switch (6) in the ON position until parking brake indicator (7) on the AVSpare Monitoring System panel goes out. The parking brake is now disengaged.

    Note: The service brakes can be used to stop the machine when the machine has brake oil pressure. Use the service brakes to control the machine when the machine is being towed.

    Note: Using the service brakes will cause the braking system oil pressure to decrease. If brake accumulator oil pressure indicator (8) comes on, operate the portable hydraulic pump to increase the braking system pressure. Ensure that the braking system pressure is maintained for the duration of the towing.


    NOTICE

    Operating the portable hydraulic pump for extended periods of time may cause overheating and possible damage of the electric motor. If overheating is observed, stop operating the portable hydraulic pump and allow it time to cool before towing is continued.


    Note: For the removal of the portable hydraulic pump from the machine, refer to Steps 13 through 15.

  1. Repeat Steps 3 through 6.

  1. Disconnect and remove the portable hydraulic pump from the machine.

  1. Install the caps on the quick connect couplers.



    Illustration 7g00943005

  1. Remove the loop wire and reconnect the wiring connectors of the transmission oil pressure switch and the transmission wiring harness.


NOTICE

Inspect the machine thoroughly. Remove the loop wire (if fitted) and repair any damage before returning the machine to operation.


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