Section E - Hydraulics
Fault Finding
Hydrostatic Transmission
E - 41 E - 41
9803-9450-2
Pump Main Relief Pressure Test Points
The upper illustration shows the right hand side of the
pump, the lower illustration shows the left hand side of the
pump.
!MWARNING
Fluid Under Pressure
Fine jets of fluid at high pressure can penetrate the
skin. Keep face and hands well clear of fluid under
pressure and wear protective glasses. Hold a piece of
cardboard close to suspected leaks and then inspect
the cardboard for signs of fluid. If fluid penetrates your
skin, get medical help immediately.
INT-3-1-10_2
Fig 32.
Testing Main Relief Valves
Whilst carrying out this test make sure the area around the
machine is clear of personnel.
1 Remove the seat and seat base. Install a 0 - 400 bar
(0 - 6000 lb/in
2
, 0 - 422 kg/cm
2
) pressure gauge into
the appropriate point on the pump to measure the
pressure generated in the motor feed line
2 Apply the park brake.
3 Start the engine and run at max. revs. then operate
the transmission control to select the appropriate
drive.
!MCAUTION
Do not hold the transmission in drive for more than 10
seconds or serious overheating will occur.
0086
4 The gauge will show the relief pressure setting which
should be as shown in Technical Data.
If the pressure setting is incorrect, the appropriate valve
should be removed and a new one fitted. The valves are
not adjustable.
A Left motor forward port
B Left motor reverse port
C Right motor reverse port
D Right motor forward port
A
C
D
B
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