4) 4) PARKING BRAKE OPERATED (OLD) PARKING BRAKE OPERATED (OLD) FRONT 24 T1 P2 P1 A1 45 T2 A2 25 REAR A B 21 22 21 P 20 S2 B2 B1 S1 C5 C6 S3 23 Parking brake switch C3 G1 PS 46 B3 C4 C1 T/M G2 23 PS PARKING T2 Parking brake solenoid Return line P 26 6 Return line D A B L S1 B A Main pump 955A4BS05 When the parking brake switch is pressed B position, the solenoid valve is deenergized and the valve open the drain port. At the same time, the hydraulic oil in the parking brake return to the tank through the solenoid valve. When the piston rod is returned by the force of the spring, the parking brake is applied. 4-7 T1 8