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5. MANUAL RELEASE OF PARKING BRAKE
5.1 OUTLINE OF PARKING BRAKE
The parking brake is built into the left and right travel motors.
When the parking brake is released under normal conditions, the parking brake switch is operated and uses the hydraulic
power generated when the engine is running.
If the engine is stopped and there is no hydraulic power, even if the parking brake switch is set to the RUN position, the parking
brake will remain applied.
If any failure should occur in the HST (pump, motor) or engine, and the engine cannot be started again, release the parking
brake manually.
5.2 METHOD FOR MANUAL RELEASE OF PARKING BRAKE
• When releasing the parking brake manually, loosen the hydraulic tank cap slowly, then remove it and wait for the
oil temperature to go down fully.
• The circuit inside the HST is still under internal pressure, so when removing plugs and hoses, do not stand
directly in front of them; loosen them gradually before removing.
• When the hoses are removed, a large quantity of oil will come out, so always catch the oil in an oil container.
• When releasing the parking brake manually, the operation involves dangerous work, such as removing
high-pressure hoses, so always pay careful attention to safety during the operation and contact your distributor
before starting the operation.
[1] PROCEDURE FOR RELEASING PARKING BRAKE MANUALLY.
When releasing the parking brake manually, do as follows.
1. Remove
the undercover. For details, see “2.20 UNDER COVER”.
2. Remove plugs (1) (2 on each side) from the left and right travel motors.
3. Set washer (3) to the supplied bolt (2) (M10 x 100), then pass the bolt
through the plug hole.
4. Turn bolt (2) clockwise to screw it into the thread of brake piston (4) inside the
travel motor.
Screw in bolt (2) until the seat surface of washer (3) contacts the cover.
5. Turn bolt (2) two more turns clockwise.
When this is done, the brake piston is pulled towards the cover and the
parking brake is released.
Summary of Contents for MST-800VD
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