FLOOR JACK
9
Model 50524 - 2-1/4 Ton Capacity
• Safety
• Operation
• Maintenance
• Parts
BEFORE using this product, read this manual
!
and follow all its Safety and Operating
instructions. Failure to do so may result in
personal injury and/or property damage.
Sears, Roebuck and Co., Hoffman Estates, IL 60179
Printed in China
!
!
WARNING
WARNING
• Study, understand, and follow all
instructions with and on this device before
operating this device.
• Do not exceed rated capacity.
• Use only on hard, level surfaces capable
of sustaining rated capacity loads.
• Lift only on areas of the vehicle as
specified by the vehicle manufacturer.
• This is a lifting device only. Immediately
after lifting, support the vehicle with
appropriately rated vehicle stands.
To avoid crushing and related injuries:
• NEVER work on, under or around a load
• Never work on, under, or around a load
supported only by a jack.
supported only by this device.
• ALWAYS use appropriately rated jack
stands.
• Do not move or dolly the vehicle while on
the jack.
• No alterations shall be made to this
product.
! SAFETY MESSAGE !
Be sure all tools and personnel are clear
before lowering load. No alterations shall
be made to this device. Only attachments
and/or adapters supplied by the
manufacturer shall be used. Lift only on
areas of the vehicle as specified by the
vehicle manufacturer.
• Only attachments and/or adapters
supplied by the manufacturer shall be
used. Contact 1-888-332-6419 for more
information.
• Failure to heed product markings or
warnings may result in personal injury or
property damage.
NOTE: Jack stands are rated per pair
unless otherwise noted.
Use 1 matched pair per vehicle only.
!
ADVERTENCIA
• Leer, comprender, y seguir las
instrucciónes antes de utilizar el aparato.
• El manual de instrucciónes y la
información de seguridad deben estar
comunicado en lengua del operador
antes del uso.
• No seguir estas indicaciónes puede
causar daños personales o materiales.
3
TO ASSEMBLE THE CARRY HANDLE ONTO THE JACK
Snap the carry handle onto the nuts of jack’s middle axle. (see Fig. 1)
Carry handle
1
2
Nut of
middle axle
FIG. 1
OPERATION
KNOW YOUR JACK
BEFORE USE
• Read the operator's manual completely
and familiarize yourself thoroughly with the
product, its components and recognize the
hazards associated with its use.
Compare Fig. 2 illustration with your jack
BEFORE operation to become familiar with
the location of various jack components.
oil filler plug
(not shown,
• Occasionally during shipment and/or
handling air can get trapped in the system,
which can interfere with the jacks lifting
performance.
on reservoir)
cover plate
(remove to
access oil
filler plug)
saddle
lifting arm
• It is recommended to cycle the jack a few
times without applying load:
handle
carry
• Engage release valve with notched end
of jack handle. Close release valve by
turning the jack handle clockwise until
tight.
front
sleeve
handle
wheel
release
valve
• Insert jack handle into handle sleeve.
Pump the handle until the jack saddle
reaches its maximum height.
• Engage release valve with notched end
of jack handle. Open release valve by
turning jack handle counterclockwise, but
no more than 1/2 full turn.Allow the saddle
to reach its lowest position.
frame
castor
base
engage release
• Repeat the above procedure a few times.
valve with this end
SPECIFICATjIaOckNhSandle
• To release air from the hydraulic system:
• Engage release valve with notched end
of jack handle. Open the release valve
FIG. 2
b y t u r n i n g t h e j a c k h a n d l e
counterclockwise, but never by more than
1/2 full turn.
Rated Capacity: 2-1/4 Ton/4500 Lbs
Jack Dimensions: 21” x 8-1/2” x 5-1/2”
Lifting Range: 5-1/2” ~ 15” (Approx.)
(140mm - 381mm)
• Remove the oil filler plug from the cylinder.
(see Fig. 3)
• Insert jack handle into handle sleeve.
Rapidly pump jack handle through several
Oil Capacity: 90 cc ± 5 cc
full strokes.
• Reinstall the oil filler plug into the cylinder
Net Weight: 27.1 lbs. (Approx.)
again and jack is now ready to use.
4
• 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.
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.
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.
• 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.)
• 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.
LOWERING THE JACK
!
To avoid crushing injuries and property
• Opening the release valve allows oil to flow
back into the reservoir. This releases
damage: Keep hands and feet clear of work
area when lowering load.
hydraulic pressure on the ram, which
results in lowering the saddle.
• Raise load high enough to clear the jack
stands, then carefully remove jack stands
(always used in pairs).
HOW TO USE YOUR JACK
• 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:
RAISING THE JACK
• With notched end of the jack handlle (see
Fig. 2) close release valve by turning the
handle clockwise.
a. Use another jack to raise the vehicle
high enough to reinstall jack stands.
b. Remove the affected jack and then the
stands.
• 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.
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.
• 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.
5
MAINTAINING OIL LEVEL
• When not in use, ALWAYS store jack with
saddle lowered all the way down.
Important: When adding or replacing oil,
ALWAYS use a good grade Hydraulic Jack
oil. We recommend Mobil DTE13M or
equivalent. DO NOT use Hydraulic Brake
Fluid, Alcohol, Glycerine, Detergent, Motor
Oil or dirty oil. Use of an improper fluid can
cause serious internal damage to your jack.
ANNUAL INSPECTION
To ensure that it is in optimum condition,
annual inspection of the jack at a Sears
Service Center is recommended.
REPLACING OIL
ADDING OIL
• To drain oil, remove cover plate and oil filler
plug and open release valve. Turn jack over
and drain old oil out through the oil filler
hole and into a suitable container.
• Position the jack on level ground and fully
lower the saddle. (Ram will be all the way
in). Remove oil filler plug located under
cover plate (see Fig. 3).
Note: Dispose of hydraulic oil in accordance
with local regulations.
• Oil should be filled to the level of about
3/16” above the inner cylinder as seen from
the oil filler hole. If low, add oil as needed.
• Refill with new oil through the oil filler hole.
DO NOT allow dirt or foreign material to
enter the hydraulic system when filling.
• Re-install oil filler plug and cover plate. The
jack is now ready to use.
• After refilling, remove any air from the
hydraulic system by opening the release
LUBRICATION
valve and rapidly pumping the jack handle
several times.
• Add lubricating oil to all moving parts as
• Re-install oil filler plug and cover plate and
the jack is ready to use.
needed.
PREVENTING RUST
• Check ram and pump plunger (see Fig. 3)
every few months for any signs of rust or
corrosion. Clean as needed by wiping with
an oily cloth.
Oil Filler Plug
Proper Oil Level
Ram all the way in
Release Valve
Plunger Down
FIG. 3
6
PROBLEM-SOLVING HINTS
Corrective Action
Symptom
Possible Causes
• Release valve not tightly closed
• Ensure release valve is tightly closed
Jack does not lift load
• Overloaded - too much weight on jack • Reduce weight on jack
Jack bleeds off
• Release valve not tightly closed
• Ensure release valve is tightly closed
(starts to lower) after lift • Hydraulic unit malfunction
• Replace power unit assembly
• Drain fluid to proper level
Jack does not lower after • Oil reservoir overfilled
unloading
• Clean and lubricate moving parts
• Linkages binding
• Fluid level low
• Ensure proper fluid level
• Air trapped in system
Poor lift performance
• With ram fully retracted, open release
valve, pump handle several times to
expel trapped air
Does not lift to full
• Fluid level low
• Ensure proper fluid level
MODEeLxteNnUsioMn BER: 50524
PARTS
The Model Number and Serial Number are found on the lifting arm and handle sleeve
respectively. Always mention the Model Number and Serial Number when requesting service
or repair parts for your jack.
INDIVIDUAL PARTSARE NOT AVAILABLE FOR REPLACEMENT ASSEMBLIES
Key
Description
Saddle
1
7
2
6
1
2
Power Unit Assembly
3
Handle Assembly
Front Wheel Assembly
Rear Castor Assembly
Cover Plate
4
5
3
6
7
Oil Filler Plug
4
—
––
Operators Manual
Warning Label
5
FIG. 4
For after sale support and assistance:
Call 1-888-332-6419, 8:00 AM - 4:45 PM CST., Monday - Friday
7
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and electronics, call or go on-line for the location of your nearest
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or maintenance agreement (Canada) on a product serviced by Sears:
1-800-827-6665 (U.S.A.)
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a domicilio, y para ordenar piezas:
Au Canada pour service en français:
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(1-888-784-6427)
(1-800-533-6937)
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®
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®
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