4-1
4.
T
ROUBLESHOOTING
4.1 I
NTRODUCTION
The following section on troubleshooting provides guidelines on the types of
problems users may encounter in the field, helps determine the cause of problems,
and suggests proper corrective action.
Careful inspection and accurate analysis of the symptoms listed in the
Troubleshooting Guide will localize the trouble more quickly than any other method.
This manual cannot cover all possible problems that may occur. If a specific
problem is not covered in this manual, call our number for service assistance.
Refering to Section 2.0 and 5.0 will aid in understanding the operation and function
of the various components and systems and help in diagnosing and repair of the
machine.
G
ENERAL
P
ROCEDURE
Thoroughly study hydraulic and electronic schematics in Section 5. Check for loose
connections and short circuits. Check/repair/replace each component in the Truth
Table that is listed under each machine function that does not operate properly.
Use the charts on the following pages to help determine the cause of a fault.
NOTE: Spike protection diodes at components have been left out of the charts
to eliminate confusion.
WARNING
!
!
When troubleshooting, ensure that the work platform is resting on a
firm, level surface.
When performing any service that requires the platform to be raised,
ensure that the platform and booms are supported by a crane
capable of supporting the load.
Unplug the machine or disconnect the battery when replacing or
testing the continuity of any electrical component.
Section 4
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