Enerpac JH-Series - Manual (Page 4)

OPERATION Check load rating on jack nameplate to make certain the jack is capable of lifing the
load. Use a gauge to monitor the load. Gauge adaptor kits are available for 20,30, 50
and 100 ton jacks. Use gauge kit GF20L for JH20 models, and gauge kit GF325 for
JH306, JH506, and JH1006 models.
Raising the Load
1. On 30 - 100 ton models, open air vent.
2. Use wrench end of handle to close the release valve by turning clockwise hand tight.
a
CAUTION
Excessive tightening is unnecessary and will cause wear.
3. Insert handle into jack pump beam and pump until desired
height is reached.
NOTE: For 50 to 100 Ton jacks, use speed (A) pump beam until
plunger reaches load. Then move the handle to load (B )
pump beam to lift the load.
a
CAUTION
In certain situations, the pump handle can kick back. Always keep
body away from the line of force of the handle.
4. Remove jack handle when not in use.
a
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.
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.
a
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.
2. All jacks are load return. Without a load, the plunger may not retract. Adding weight
to the plunger will make it retract.
a
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.
A
B
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