OPERATION
OPERATING PRINCIPLES
• With release valve closed, an upward
stroke of the jack handle draws oil from the
reservoir tank into the plunger cavity.
Hydraulic pressure holds a valve closed,
which keeps the oil in the plunger cavity.
• A downward stroke of the jack handle
releases oil into the cylinder, which forces
the ram out. This raises the saddle. (NOTE:
To avoid damage to the cylinder if the load
exceeds the rated capacity of the jack, oil
is automatically released back into the
reservoir through the safety overload
valve.)
• W h e n t h e r a m r e a c h e s m a x i m u m
extension, oil is bypassed back into the
reservoir to prevent an over-extended ram
stroke and possible damage to the jack.
• Opening the release valve allows oil to flow
back into the reservoir. This releases
hydraulic pressure on the ram, which
results in lowering the saddle.
HOW TO USE YOUR JACK
RAISING THE JACK
• With notched end of the jack handlle (see
Fig. 1) close release valve by turning the
handle clockwise.
• Chock the vehicle’s wheel with appropriate
devices to ensure lifting stability.
• Refer to the vehicle manufacturer’s owners
manual to locate approved lifting points on
the vehicle. Position jack so that the saddle
is centered under the load at an appropriate
lift point.
• Insert jack handle into handle sleeve. Pump
jack handle until saddle almost contacts the
vehicle. Check to see that the saddle is
centered and will contact the load lifting
point firmly.
• Continue to pump the jack handle to lift the
vehicle to the desired height. After lifting,
support the load with appropriately rated
jack stands BEFORE working on the
vehicle.
Rated capacity of jack stands is
per
pair
, it is
NOT
the sum of individual
capacities unless specifically noted to the
contrary by the jack stand manufacturer.
Do Not
exceed rated capacity.
Ensure
that
the vehicle support points are fully captured
between the outer lugs of both jack stands.
Use
a matched pair of jack stands
per
vehicle to support
1
end
only
.
Use
1 pair
per vehicle
only
. Failure to do so may
result in sudden loss of load, which may
cause personal injury and/or property
damage.
LOWERING THE JACK
To avoid crushing injuries and property
damage: Keep hands and feet clear of work
area when lowering load.
• Raise load high enough to clear the jack
stands, then carefully remove jack stands
(
always
used in pairs).
• With notched end of jack handle, SLOWLY
open the release valve by turning the
handle counterclockwise, but never more
than 1/2 full turn. If the load fails to lower:
a. Use another jack to raise the vehicle
high enough to reinstall jack stands.
b. Remove the affected jack and then the
stands.
c. Using the other jack, lower the load by
turning the operating handle counter-
clockwise, but no more than 1/2 full turn.
• After removing jack from under the load,
push saddle down to reduce ram exposure
to rust and contamination.
5
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