138 CHAPTER 5
Troubleshooting
Problem Possible cause(s) Solution(s)
Cavitation,
excessive noise or
vibration of the
pump
The hydraulic tank valve is
not fully open.
Fully open the hydraulic
tank valve.
The oil level is low. Add oil to meet the
requirements.
The oil is too thick. Verify the oil in the system
is part of the
recommended lubricants
and/or change the oil. See
“Recommended lubricants”
on page 123 to find out
about the proper type of oil
to use. Refer also to
“Hydraulic Oil
Replacement Procedure”
on page 92.
There is air in the system. Check all the connections
of hoses and pipes and
tighten them if necessary.
There is particle
contamination.
Change the oil return filter
and replace the oil in the
system. See “Hydraulic Oil
Replacement Procedure”
on page 92.
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