Section E - Hydraulics
Fault Finding
Hydrostatic Transmission
E - 37 E - 37
9803-9450-2
Machine Veers to One Side when
Travelling
This condition may be corrected by adjusting the pump
servo units but before attempting this, carry out the
following preliminary checks.
Adjustment
If the machine does not travel in a straight line, proceed as
follows: K Table 9. ( T E-37) and K Fig 28. ( T E-36)
Table 9.
Check tyre pressures and
condition
The pressure of one tyre may be low or one or both tyres on one side of the
machine may be new and the other tyres worn. In both these cases the rolling
circumference of the tyres will be unequal causing the machine to veer to one side.
Check chain tension Chains which are tensioned unequally will cause the machine to veer to one side.
Always adjust the tension on all four chains, never just one.
Check the servo joystick Check that the joystick spools are not sticking and are correctly operated by the
lever.
1 Machine veers excessively to left in forward travel Loosen locknut on adjuster screw C, screw in adjuster
screw 1/4 turn and tighten locknut. Try machine. Keep
adjusting 1/4 turn at a time until straight line travel is
achieved.
2 Machine veers excessively to right in forward travel Proceed as for fault 1 but adjust screw A.
3 Machine veers excessively to left in reverse travel Proceed as for fault 2 but adjust screw D.
4 Machine veers excessively to right in reverse travel Proceed as for fault 3 but adjust screw B.
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