37 - 1
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.
Before proceeding:
1 Make sure that the hydraulic fluid is at the correct
working temperature (50
o
C, 122
o
F).
2 Be sure to remove ALL contamination and if possible
identify its origin. It may be part of a component from
elsewhere in the circuit.
3 Replace any seals such as ‘O’ rings before 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
Chart D - System Fails to Operate when the ‘Mode Switch’
is Activated (operator seat facing forward)
Section D Controls
9803/3280
Section D
37 - 1
Issue 1
Precision Control (Servo)
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