COMPONENT OPERATION / BRAKE < Parking brake is released > 1.When the parking brake switch (9) is pushed to turn it off, pressurised oil is sent from HST inching valve to the parking brake cylinder chamber (11) by the parking brake solenoid valve. 2.he force of pressure raised oil in the chamber (11) overcomes the force of the spring (13) and moves the parking brake piston (12) to the right. Consequently the service brake piston becomes free and releases the wet disk brake (7).
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