Troubleshooting Guide - Enerpac PL Série Manuel D'utilisation

8.1 Trouble shooting guide
Problem
1. The cylinder does not
complete its stroke, or
does so only slowly
and with spurts.
2. The cylinder
completes its stroke
but loses pressure.
3. The cylinder does not
complete its stroke, or
does so only partially
or more slowly than it
needs to.
Possible cause
A. Not enough oil in the pump reservoir.
B. Release valve is open.
C. Hydraulic coupling loose.
D. Excessive load.
E. Air under pressure in the air lines.
F. Cylinder plunger binding.
A. There is a leak in the connection.
B. There is a leak in the seals.
C. There is a leak inside the pump.
A. Release valve closed.
B. Pump reservoir is too full.
C. Hydraulic coupling loose.
D. Air under pressure in the air lines.
E. Internal diameter of the hose too small.
F. Cylinder spring broken or other problem
with the cylinder.
Solution
A. Change oil in accordance with the maintenance
instructions.
B. Close the release valve.
C. Check that all the couplings are securely
fastened.
D. Do not try to exceed the nominal load.
E. Vent the system in accordance with the
instructions.
F. Check the condition of the cylinder. Have the
cylinder repaired by a technician who is qualified
to work with hydraulic systems.
A. Check that the connections are properly fastened
and/or are leak-tight.
B. Trace the source of the leak or leaks and have
the system repaired by a technician who is
qualified to work with hydraulic systems.
C. Have the pump repaired by a technician who is
qualified to work with hydraulic systems.
A. Open the release valve.
B. Allow sufficient oil to flow away for the level to
fall back to its maximum.
C. See the instructions for changing the oil.
D. Check that all the quick-connect couplings are
securely fastened.
E. Vent the system in accordance with the
instructions.
F. Use a hydraulic hose with a larger diameter.
Have the cylinder repaired by a technician who is
qualified to work with hydraulic systems.
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