Troubleshooting - Enerpac JH-1.5 Hoja De Instrucciones

4 . Remove jack handle when not in use .
Lowering the Load
1 . Use wrench end of jack handle to open the valve a very small amount to avoid sudden
dropping of the load . Turn release valve counter-clockwise very slowly to control the speed of
descent .
2 . All jacks are load return . Without a load, the plunger may not retract . Adding weight to the
plunger will make it retract .
MAINTENANCE
1 . Before storing, inspect and clean the jack .
2 . Close the air vent on 30 - 100 Ton models .
3 . Store jack upright to protect the seals .
4 . Periodically lubricate the jack pump beam .

TROUBLESHOOTING

The following is intended as an aid in determining if a problem exists . DO NOT disassemble the
jack . For repair service, contact the Authorized Enerpac Service Center in your area .
Problem
Jack will not rise,
rises part way, or
rises in spurts .
Jack rises, but loses
pressure .
Plunger will not retract .
CAUTION
In certain situations, the pump handle can kick back. Always keep body away from
the line of force of the handle.
WARNING
Stay clear of loads supported by hydraulics. After the load has been raised, it
should be blocked, using material capable of supporting the load.
WARNING
NEVER turn release valve quickly to full open when there is a load on the jack. The
load will fall uncontrolled, leading to personal injury and/or property damage.
CAUTION
If you decide to stand on the jack, be sure the jack is stable and hold on to a sturdy
object to avoid injury.
Possible Cause
Load is too heavy .
Release valve open .
Low fluid level .
Air in system .
Plunger binding .
Load is too heavy .
Plunger seal leaking .
No load on the plunger .
Release valve closed .
Air vent closed .
(on 30 - 100 Ton models)
Reservoir is over-filled .
Worn or damaged seals .
Plunger damage .
Do not attempt to lift more than rated capacity .
Close release valve .
Add fluid . See page 3 .
Remove air as directed on page 3 .
Have jack serviced by a qualified hydraulic technician .
Do not attempt to lift more than rated capacity .
Have jack serviced by a qualified hydraulic technician .
Put weight on the plunger to help it retract .
Open the release valve slowly . See "Lowering the Load" .
Open air vent valve .
With jack in the upright position and no load, remove fill
plug and allow oil to drain out of fill hole .
Have jack serviced by a qualified hydraulic technician .
Have jack serviced by a qualified hydraulic technician .
4
Solution