Section 9
Troubleshooting
20425626
5-2005/Rev 0
9-4
S30 Troubleshooting Guide
Malfunction Indication Comments
Make sure the orifice does not
exceed the capacity of the
pump.
Large, worn or damaged
orifice
Make sure the orifice is in good
working condition. Verify that
the jewel is installed in the
orifice mount.
Inspect the discharge check
valves in the sealing heads.
Check valve leakage
Inspect the inlet check valves in
the sealing heads.
Inspect the high pressure seal
on the plunger.
Seal leakage
Inspect the sealing head-to-
cylinder sealing surfaces.
Check the operation of the
hydraulic relief valve.
Verify that the directional
control valve is shifting
properly.
9.
Abnormal fluctuations in
high pressure water signal
Hydraulic control
malfunction
Check the operation of the
proximity switches.
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