TIC Key to diagram:
LEXION Montana 570-520
Basic Machine Hydraulic System
115 213 312 321 232 347 3003 3003-1 3003-2 407 731 760
Grain tank unloading lubricant reservoir Reel drive pump ......................................................15 cm3/rev. Threshing mechanism coupling hydraulic cylinder Grain tank unloading hydraulic cylinder Grain tank unloading lubricant pump Straw chopper clutch hydraulic cylinder Service brake / Parking brake hydraulic cylinder Service brake / Parking brake right hydraulic cylinder Service brake / Parking brake left hydraulic cylinder Orifice plate G..............................................................Ø 1 mm Non-return valve One-way restrictor, one-sided
Y21 Y35 Y76 Y88 Y105 Y106 Y107 Y108
Threshing mechanism clutch engage solenoid valve Grain tank unloading solenoid valve Straw chopper clutch solenoid valve Front attachment clutch solenoid valve (proportional) Differential lock solenoid valve Parking brake solenoid valve st Gearbox shift 1 gear solenoid valve Gearbox shift 2nd gear solenoid valve
T P5 A S
Tank port Ground drive feed pump port Hydraulic cylinder port Emergency operation screw
VI XII
Low-pressure hydraulics valve block Electrohydraulic gearshift (EHS) – 2-gear manual gearbox
Description of function: Parking brake
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. With solenoid valve (Y106) de-energised, the connection is provided from the hydraulic cylinder (A) to the return line into the tank (T) via the conical seat in the valve insert (V). Here the low pressure (P5) applied is blocked by the spherical seat in the valve insert. When the corresponding solenoid valve (Y106) is actuated, the plunger opens the ball in the valve insert and closes the return line (T) with the conical seat. The low pressure (P5) is thus applied to the hydraulic cylinder (3003 and/or 3003-1 / 3003-2) via the consumer port (A) whereas the return line to the tank (T) is blocked.
- Wheeled machine
Drum brake principle (dry)
- TerraTrac (half-tracks)
Multi-disc brake principle (wet) Note:
03/06
In case of emergency operation, screw (S) must be slightly screwed in up to the stop (otherwise the valve seat will be damaged) to make the conical seat in the valve insert (V) close the return line to the tank (T) tightly.
Lex-h-Kap4
4-23
