4) 4) PARKING BRAKE OPERATED (NEW) PARKING BRAKE OPERATED (NEW) FRONT 24 BL1 25 P1 T1 BL2 BR1 45 T2 P2 BR2 A B REAR P S3 23 G1 PS B3 46 23 G2 PS T/M PARKING T2 Return line Parking brake solenoid P 26 Return line 6 A B D L S1 B A Main pump 955SA4BS05 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. 4-7-1 21 S1 20 P 23 PS PS 38 PP T1 8