Edition Manual Chapter Page
2014-09-20 Workshop Manual, GGP Park 4 Hydraulic system 8
4.4 Separate hydraulic pump for the power transmission
4.4.1 Physical description
8. By-pass valve in the main pump (C).
9. Hydraulic motor in the
front axle drive (B).
11. Leak flow lines.
12. Main flow lines.
13. B-pass valve (only used when oil
change)
Colour - Pressure
Red is the feeding pressure to the
main pump and to the external
hudraulics.
Dark red is the working pressure
to the hydraulic motors.
Blue is the atmospheric pressure
in the oil container and housings.
Light blue is below the
atmospheric pressure (pump
suction side).
A. Rear axle drive with its hydraulic
motor (7).
B. Front axle drive with its hydraulic
motor (9).
C. Hydraulic pump. The parts 1-3 and 8
below are built in the hydraulic pump.
1. Charge pump, 35-45 bar.
2. Main pump.
3. Pressure limit valve for the charge
pressure.
4. Oil container.
5. Oil filter.
6. Connection to the external hydraulics
(steering converter and implement
lifter).
7. Hydraulic motor in the
rear axle drive (A).
3
5
9
7
1
2
3
5
4
6
8
A
B
C
11
11
11
12
12
13
13
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