Section E - Hydraulics
Fault Finding
Hydrostatic Transmission
E - 31 E - 31
9803-9450-2
Key to Cause Remedy Page Ref.
1 No oil in hydrostatic system Check supply of oil to pump. Section 3
2 Isolator bar or arm rest not in correct
position
Ensure isolator bar and arm rest are in operating
position, check electrical wiring and switch as
required.
Section C
3 Tyres worn or pressure incorrect Check tyre pressures and condition. Section 3
4 Charge pressure incorrect Charge pressure is controlled by the Charge
Pressure Relief Valve.
K
Transmission
Charge
Pressure ( T E-62)
Carry out flow check.
5 No or low pump output Check pump - carry out wheel speed check. K
Checking Wheel
Speed ( T E-35)
If one pump suspect, swop motor feed hoses and
notice
if problem changes sides - if ‘yes’, pump related
fault;
if ‘no’, motor related fault. K
Checking for Faulty
Pump or
Motor ( T E-33)
6 A high pressure ‘loop’ relief valve/tow
valve open/set incorrectly
Replace relief valve and re-check. Pump Main Relief
Pressure Test Points
(X E-41)
7 Pump neutral position set incorrectly Adjust servo neutral position. Transmission Pump
Neutral Adjustment
(X E-38)
8 Pump servos incorrectly set Adjust servos K Machine Veers to
One Side when
Travelling ( T E-37)
To Next Page
Loading...
