TIC Key to diagram:
LEXION Montana 570-520
Basic Machine Hydraulic System
110 112
Oil tank Return filter
205 211 217 231 313 3003-1 3003-2
Working hydraulics pump Ground drive variable-displacement pump Radiator chaff screen pump Montana axle control system pump Ground drive pump servo control hydraulic cylinder Service brake / Parking brake right hydraulic cylinder Service brake / Parking brake left hydraulic cylinder
516
Service brake accumulator 0.75 l / 80 bar
614 642-1 642-2
Front attachment lower flow control valve Service brake valve, right Service brake valve, left
703 706-5 732 743
Working hydraulics pressure relief valve Rotary chaff screen pressure relief valve 150 bar Non-return valve Lower front attachment pilot spool
901
Working hydraulics measuring point
B90
Brake circuit charge pressure sensor
Y77 Y85 Y87
Working hydraulics master valve solenoid valve Raise front attachment solenoid valve Lower front attachment solenoid valve
Z79 Z80
Left brake circuit pressure actual value switch 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 – 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.
03/06
Lex-h-Kap3
3-149
