Rotary chaff screen pump

Key to diagram:

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:

Brake pressure accumulator The sensor (B90) controls the brake system accumulator pressure and, if necessary, actuates the working hydraulics master valve (Y77) in order to recharge the brake circuit accumulator to 135 ñ 165 bar.

Brake oil pressure warning The earth signal of the left / right brake circuit pressure switch (Z79/Z80) is connected to the terminal (A30) and displayed as an alarm message.