Problems And Solutions - Jung JPE 30 NVR Instrucciones De Servicio

5. Problems and solutions

Problem
The jack extension movement does
not occur.
The system does not hold the pressu-
re when the mechanism is working.
The cylinder no longer retracts (oil
not returned to the pump).
Low power.
© JUNG Hebe- und Transporttechnik GmbH
Possible cause
Overload conditions The draining
valve is not closed.
Overload conditions The lowering
valve is not completely closed.
Hydraulic unit malfunction.
Connector malfunction, damaged
mechanism. Overfilled tank
Hydraulic oil level low. Air in the
system.
Solution
Remedy the overload conditions.
Make sure that the draining valve
is closed.
Remedy the overload conditions.
Make sure that the draining valve
is closed.
Contact the Service department.
Secure the load using appropriate
means. Open the lowering valve,
relieve pressure in the pump and
hose, remove the connector and/
or jack, and drain the oil into an
appropriate container until the right
level has been reached.
Make sure that the fluid level is
correct. Make sure that the venting
screw pin is positioned so that the
air exchange from the tank works
correctly.
Pumps
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