User Manual

Table Of Contents
TIC LEXION Montana 570-520 Electric System
03/05 Lex-e-04t 4t-3
Description of function:
Activation of road travel During road travel, the road travel switch (S52) must be locked in order to
cut the power supply for all unnecessary electrical and hydraulic
functions.
Working hydraulics master
valve
In order to be able to build up the necessary working pressure for many
hydraulic controls, the neutral hydraulic circulation must be blocked (see
also the "Hydraulic system" section).
On MONTANA machines, actuation of the working hydraulics master
valve (Y77) is always via the ground drive hydraulic motor brake restrictor
module (A45/Pin 5#Pin2).
A LED (D5) provided on the diode PCB indicates the activation of the
circuit.
Montana axle hydraulics
master valve
The MONTANA GEN II module energizes the working hydraulics
master valve (Y77) with priority, according to the actuated MONTANA
functions. Actuation here is via the CAN bus. Only when the control
deviation becomes too small within a defined period of time (e.g. machine
raises too slowly), the MONTANA master valve (Y128) is additionally
energized.
Montana brake pressure
accumulator
The sensor (B90) controls the brake system accumulator pressure and, if
necessary (p < 135 bar), actuates the working hydraulics master valve
(Y77) via the diode PCB D0 and the ground drive hydraulic motor brake
restrictor module (A45/pin5#pin2) in order to recharge the brake circuit
accumulator – circuit diagram 26t.
Hydrostatic brake valve
system
When the diesel engine speed exceeds the allowed maximum of 2230
rpm (e.g. downhill travel), the ground drive hydraulic motor (HBM) brake
restrictor module A45 also receives this information from the fieldwork
computer module (BIF/CAB) A10 via the CAN bus. Now the ground drive
hydraulic motor (HBM) brake restrictor module A45 actuates the master
valve (Y77) in order to put a greater load on the drive.
When the diesel engine speed exceeds 2300 rpm, the brake restrictor
(Y124) is additionally actuated in order to restrict the high-pressure circuit
in the ground drive – see circuit diagram 42a of standard machine.