5
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 .
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.
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 .
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 .
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.
Lowering the Load
OPERATION
Raising the Load
Check load rating on jack nameplate to make certain the jack is capable of lifting the load . Use a
gauge to monitor the load . Use the table below to determine the proper gauge kit for your jack .
Model No.
GF-715
GF-830
GF-350
For use
with
Jacks
JHA-73
JHA-156
JHA-756
JHA-356
JHA-1506
JTA-76
JTA-176
JTA356
1 . On models with air vents, open air vent .
2 . Use wrench end of handle to close the release valve by turning clockwise hand tight .
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 150 ton JHA jacks, use speed (A) pump beam
until plunger reaches load . Then move the handle to
load (B) pump beam to lift the load .
A
B