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Steering hydraulics pump
Service brake Brake cylinders
Key to diagram:
K -1 Release parking brake ram K -2 Service brake ram N Parking brake emergency operation (mechanical) S Brake air gap adjusting screw
110 Oil tank 112 Return filter
205 Working hydraulics pump 211 Ground drive variable-displacement pump 217 Radiator chaff screen pump 231 Montana axle control system pump 313 Ground drive pump servo control hydraulic cylinder 3003-1Service brake / Parking brake right hydraulic cylinder 3003-2Service brake / Parking brake left hydraulic cylinder
516 Service brake accumulator 0.75 l / 80 bar
614 Front attachment lower flow control valve 642-1 Service brake valve, right 642-2 Service brake valve, left
703 Working hydraulics pressure relief valve 706-5 Rotary chaff screen pressure relief valve 150 bar 732 Non-return valve 743 Lower front attachment pilot spool
901 Working hydraulics measuring point
B90 Brake circuit charge pressure sensor
Y77 Working hydraulics master valve solenoid valve Y85 Raise front attachment solenoid valve Y87 Lower front attachment solenoid valve
Z79 Left brake circuit pressure actual value switch Z80 Right brake circuit pressure actual value switch
Description of function:
Emergency operation The parking brake system consists of a spring-type accumulator in the brake cylinders. The low-pressure circuit of the machine is used for releasing the parking brake.
If the hydraulic circuit fails (depending on the diesel engine!), the parking brake can be released manually, using screw N. To do this, screw in screw N ñ see Repair Manual.
Brake air gap The Montana brake system is a wet multi-disc brake. To ensure freewheeling of the discs when the brake is not actuated, an air gap can be adjusted at screw S ñ see Repair Manual.
