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Fault Finding
Introduction
The fault finding procedures are given in the form of flow
charts. There are a number of charts, each one dedicated to
a particular fault. The charts are designed to identify
possible causes by performing checks and where
applicable, specific tests. Having identified a cause the
suggested remedy is given. The charts are designed to
identify causes through a process of elimination, starting
with the simplest, most easily rectified faults.
When fault finding note the following:
1 Make sure that the hydraulic fluid is at the correct
working temperature (50
o
C, 122
o
F).
2 If hydraulic contamination is found be sure to remove
ALL debris, and if possible identify its origin. It may be
part of a component from elsewhere in the hydraulic
circuit.
3 Renew any seals such as ‘O’ rings when re-assembling
hydraulic components.
Fault Finding Charts:
Chart A - No Servo Controls (system fails to operate)
Chart B - All Backhoe Services Slow to Operate
Chart C - One Backhoe Service fails or is Slow to Operate
Section D Controls
9803/3280
Section D
47 - 1
Issue 1
Precision Control (Servo)
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