MACHINES AND
ACCESSORIES
Page 26 of 29
11 TROUBLESHOOTING COMMON PROBLEMS
Problem
Cause
Solution
The pump is operating but
the plunger does not move.
A. There is a leak in the
circuit
between
the
pump and the cylinder
A. Check the connections
between the hydraulic
pipes and replace the
seals
When I open the release
valve, the plunger does not
return to the rest position
A. The oil pipe is loose
B. The pump is full of oil
C. The cylinder / piston is
broken
A. Check the connections
between the hydraulic
pipes
B. Open the release valve
of the pump
C. Replace the cylinder
unit
When manually pumping the
plunger does not move
A. The release valve is
not properly closed.
B. There is air in the
system
A. Check and close the
release valve.
B. Release air from the
circuit
Using the pump in pneumatic
mode, the pump operates but
the plunger does not move
A. The release valve is
not properly closed.
B. There is air in the
system
A. Check and close the
release valve.
B. Release air from the
circuit
The plunger fails to perform
the entire descent stroke
A. There is not enough oil
in the circuit.
A. Add oil to the circuit
The pneumatic pump is not
working
A. The pressure of the
pneumatic circuit is too
low
to
achieve
the
desired oil pressure
B. The pneumatic pump is
broken
A. Check the air pressure
B. Replace the pneumatic
pump
Oil leak
A. The seals are broken
B. Some
connection
components are loose
A. Replace the seals
B. Tighten the screwed
parts
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