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Operation - Craftsman 50145 Speedy Lift Operator's Manual

3-1/2 ton capacity floor jack
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KNOW YOUR JACK
Compare Fig. 3 illustration with your jack
BEFORE operation to become familiar with
the location of various jack components.
Lifting Arm
Handle Socket
Release Valve
Rear Castor
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
SPECIFICATIONS
1
Rated Capacity: 3
/
Ton/7000 Lbs
2
Jack Dimensions: 27-1/4" x 13-1/4" x 6-1/2"
Lifting Range: 5-3/4" ~ 20" (Approx.)
Oil Capacity: 150 c.c.
Net Weight: 82 lbs. (Approx.)

OPERATION

cylinder if the load exceeds the rated
capacity of the jack, oil is automatically
released back into the reservoir through
the safety overload valve.)
• When the ram reaches maximum
extension, oil is bypassed back into the
reservoir to prevent an over-extended
ram stroke and possible damage to the
Jack Handle
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
• Chock the vehicle wheels with
appropriate devices to prevent vehicle
Saddle
from moving and to ensure lifting
stability.
• Close the release valve by turning the
jack handle clockwise until tight. (see Fig.
3)
• Refer to the vehicle manufacturer's
owner's manual to locate approved lifting
points on the vehicle. Position jack so
that the saddle (see Fig. 3) is centered
Front Wheel
under the load at an appropriate lift point.
• Pump jack handle until saddle ALMOST
FIG. 3
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, immediately support the load with
appropriately rated vehicle support
stands BEFORE working on the vehicle.
LOWERING THE JACK
• SLOWLY open the release valve by
turning the handle counterclockwise,
but never more than 1/2 full turn at a
time.
4

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