Functional Description - Stiga PARK PRO 540 IX Workshop Manual

PARK PRO 540 IX - 740 IOX

4.4.2 Functional description

Not turning, steering wheel not actuated
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
7, 8. Pressure lines to transmit the steering
power.
9. Steering cylinder.
10. Auxiliary hydraulics.
11. Pressure reliefe valve 31-33 bar.
12. Filter.
The charge pump (1) is sucking oil from the tank and pumping it into the steering valve.
Since the stering is not in use, the oil flows without resistance through the steering valve,
distributor and to the remaining auxiliary hydraulics. From the auxiliary hydraulics, the oil is
flowing back to the tank via the filter (12).
WORKSHOP MANUAL Chapter
4 - Hydraulic system
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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