5
NOTE: Non-vented hand pumps require air in the reservoir to function
properly. If the reservoir is completely filled, a vacuum will form
preventing oil from flowing out of the pump.
Keep Oil Lines Clean
When coupler halves are disconnected, always screw on dust caps. Use every
precaution to guard unit against entrance of dirt because foreign matter may
cause pump, cylinder, or valve failure.
TROUBLESHOOTING GUIDE
Problem Possible Cause Solution
Cylinder does Oil level in pump Add oil according to the Maintenance instructions.
not advance. reservoir is low.
Release valve Close the release valve.
is open.
Loose hydraulic coupler. Check that all couplers are fully tightened.
Load is too heavy. Do not attempt to lift more than rated tonnage.
Air trapped in system. Remove air according to instructions.
Cylinder plunger binding. Check for damage to cylinder.
Have cylinder serviced by a qualified
hydraulic technician.
Cylinder advances, Leaking connection. Check that all connections are tight and leak free.
but does not hold
pressure.
Leaking seals. Locate leak(s) and have equipment serviced
by a qualified hydraulic technician.
Internal leakage in pump. Have pump serviced by a qualified hydraulic technician.
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