Hydraulic Steering; Physic Description - Stiga PARK PRO 540 IX Workshop Manual

PARK PRO 540 IX - 740 IOX

4.4 Hydraulic steering

4.4.1 Physic description

A. Hydraulic pump. The parts 1-3 below
are positioned in the hydraulic pump.
1. Charge pump, 49-51 bar.
2. Main pump.
3. Pressure reliefe valve for the charge
pressure.
4. Oil tank
B. Steering valve including the following:
5. Gear
6. Distributor
Terminals at the steering valve:
P. Inlet from the hydraulic pump for auxilia-
ry hydraulics.
T. Outlet to the tank for leak oil and oil
from the passive side ofsteering cylin-
der when turning.
E. Outlet to other auxiliary hydraulics.
L. Outlet to the steering cylinder. Pressure
when turning left.
R. Outlet to the steering cylinder. Pressure
when turning right.
WORKSHOP MANUAL Chapter
4 - Hydraulic system
7, 8. Pressure lines to transmit the steering
power.
9. Steering cylinder.
10. Auxiliary hydraulics.
11. Pressure reliefe valve 31-33 bar.
12. Filter.
Colour - Pressure
Red is the feeding pressure to the
steering valve and auxiliary hydrauli-
cs.
Yellow is the feeding pressure to
auxiliary hydraulics connected after
the steering valve.
Blue is the atmospheric pressure in
the oil tank and lines.
Green lines can act both as pressure
lines and return lines, depending on
the movements
EDITION Page
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