Stiga 13-7454-11, Workshop Manual

Page: 65 / 123

Lowering the implement lift
F. Implement lift cylinder.
Ls. Controls for implement lift F.
T. Tank.
1. Pressure relief valve
2. Mechanically affected non-return
valve.
4. Limit valve lowering.
5. Collector block.
6. By-pass line.
Colour - Pressure
Red displays the supply pres-
sure to the external hydraulics.
Green can be both the pressure
line and the return line, depend-
ing on the implement move-
ment.
Blue displays the atmospheric
pressure in the return lines.
The by-pass line is blocked in valve Ls.
Oil flows from the control module and
through the valve Ls. Valve 1 limits the
pressure to 35 bar to protect the imple-
ment.
The piston in cylinder F is pressed out
with limited force and the lift sinks.
The oil on the other side of the piston is
pressed back to the tank via the valves 4,
2 and Ls and the collector block.
Valve 2 is opened mechanically using a
mechanical connection with the piston in
Ls. Valve 4 limits the lowering speed.
WORKSHOP MANUAL
TITAN
Chapter
4 - Hydraulic system
EDITION
2018
Page
6 3