Stiga Park Series Workshop Manual page 63

Edition Manual
2014-09-20 Workshop Manual, GGP Park 4 Hydraulic system
Symptom
The machine drives
forwards but not
backwards.
The machine drives
backwards but not
forwards.
Reduced speed
forwards and
possibly faster
backwards.
Reduced speed and
uneven drive.
The front wheels
don´t drive.
The rear wheels
don´t drive.
Reduced or no
speed.
Valid for
Machines with
separate hydraulic
pump.
Machines with
separate hydraulic
pump.
Machines with
separate hydraulic
pump.
All machines.
All machines.
All machines.
Machines with
separate hydraulic
pump.
Machines with
integrated hydraulic
pump.
All machines.
Chapter
Fault
Front by-pass valve
open.
Big leakage in the front
axle drive.
Rear by-pass valve
open.
Big leakage in the rear
axle drive.
Speed control cable
housing is moved.
The suction filter (5) is
clogged.
One of the axle keys is
broken.
One of the axle keys is
broken.
The belt between motor
and pump is slipping.
Check if the fan and
pulley at the pump
rotate.
Big leakage in the
external pump.
The charge pump
defective.
The pressure limit valve
(1,5-2,5 bar) for the
charge pump defective.
The belt between motor
and pump is slipping.
Check if the fan and
pulley at the pump
rotate.
Big leakage in the rear
axle drive.
Speed control cable
loose or mowed.
Page
20
Measure
Close the by-pass
valve.
Replace the front axle
drive.
Close the by-pass
valve.
Replace the rear axle
drive.
Adjust the cable
housing.
Clean the filter.
Replace the actual key.
Replace the actual key.
Worn belt
Replace the belt.
Maladjusted clutch wire
Adjust the wire.
Replace the external
pump.
Replace the external
pump.
Check the valve and its
spring. See """ at page
11" at page 11.
Worn belt
Replace the belt.
Maladjusted clutch wire
Adjust the wire.
Replace the rear axle
drive.
Repair/adjust the speed
control cable.