User Manual

Table Of Contents
TIC LEXION Montana 570-520 Electric System
03/05 Lex-e-04s 4s-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).
The actuation of the working hydraulics master valve (Y77) on Montana
machines is always via the gearshift control module (A36/pin 16), the
diode PCB D0 and the ground drive hydraulic motor brake restrictor
module (A45/pin5 # pin2).
A LED (D5) provided on the diode PCB indicates the activation of the
circuit.
Montana axle hydraulics
master valve
For the Montana functions as well, the circulation of the independent axle
control system hydraulics must be blocked (see also "Hydraulic System"
document).
According to the actuated functions, the Montana control unit (A35)
actuates the Montana master valve (Y128) and/or the working hydraulics
master valve (Y77) via the gearshift control module (A36).
Montana brake pressure
accumulator
The sensor/switch (B90) controls the brake system accumulator pressure
and, if necessary, actuates the working hydraulics master valve (Y77) via
the gearshift control module (A36/pin16), 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 42s.
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 – circuit
diagram 42 of standard machine.