Operators Manual
FLOOR JACK
Model 950239 - 2 Ton Capacity
• Safety
• Assembly
• 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
U.S. Patent:
5,755,099, 5,946,912, 6,199,379B1, 6,848,673B1
Printed in China
SAFETY INSTRUCTIONS
!
!
WARNING
WARNING
• Study, understand, and follow all
instructions provided with and on this
device before use.
• Do not exceed rated capacity.
• Use only on hard, level surfaces.
• Lifting device only.
• Immediately after lifting, support the
vehicle with appropriately rated jack
stands.
• Do not move or dolly the vehicle while
on the jack.
• Failure to heed these markings may
result in personal injury and/or property
damage.
To avoid crushing and related injuries:
• NEVER work on, under or around a load
supported only by a jack.
• ALWAYS use appropriately rated jack
stands.
! 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.
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
ASSEMBLY
TO ASSEMBLE THE TWO PIECE TO ASSEMBLE THE HANDLE INTO
HANDLE
THE SOCKET
1. Locate the Spring Pin on bottom end of 1.Pull out and hold the Spring Knob (see
Upper Handle and the Fixing Hole on the
top end of Lower Handle (See Fig. 1).
2. Align the Spring Pin with the Fixing Hole.
Connect the two handle pieces together by
pressing the Spring Pin and insert until the
Spring Pin is locked in the Fixing Hole.
Fig. 2).
2. Insert the assembled handle into the
Socket, until it is firmly seated.
3. Release the Spring Knob, the handle is
then fixed in position.
Assembled
Handle
Upper
Handle
Spring
Pin
Handle
Socket
Fixing
Hole
Spring Knob
Lower
Handle
FIG. 1
FIG. 2
4
OPERATION
KNOW YOUR JACK
BEFORE USE
Compare Fig. 3 illustration with your jack
BEFORE operation to become familiar with
the location of various jack components.
• Read the operator's manual completely
and familiarize yourself thoroughly with the
product, its components and recognize the
hazards associated with its use.
• Occasionally during shipment and/or
handling air can get trapped in the system,
which can interfere with the jacks lifting
performance.
• It is recommended to cycle the jack a few
times without applying load:
• Close release valve by turning the jack
handle clockwise until tight.
• Pump the handle until the jack saddle
reaches its maximum height.
• Open release valve by turning jack handle
counterclockwise, but no more than 1/2
full turn. Allow the saddle to reach its
lowest position.
Jack Handle
Magnetic Tool Tray
(remove to access
Oil Filler Screw)
Saddle Pad
Oil Filler Screw
(located beneath
Saddle
Tool Tray)
Lifting Arm
Handle
• Repeat the above procedure a few times.
• To release air from the hydraulic system:
Socket
• Open the release valve by turning the jack
handle counterclockwise, but never by
more than 1/2 full turn.
• Remove the oil filler screw from the
cylinder. (see Fig. 4)
• Rapidly pump jack handle through several
full strokes.
• Reinstall the oil filler screw into the
cylinder again and jack is now ready to
use.
Front Roller
Rear
Handle
Side Handle
Rear Caster
Release Valve
(inside Handle Socket,
engage with Jack Handle)
FIG. 3
SPECIFICATIONS
Rated Capacity: 2 Ton/4000 Lb
Jack Dimensions: 27-3/4” x 12-1/8” x 6-1/4”
Lifting Range: 3-3/4” ~ 18-1/2” (Approx.)
(95mm - 470mm)
Oil Capacity: 150 c.c.
Net Weight: 42.5 lbs. (Approx.)
5
OPERATION
• Continue to pump the jack handle to lift the
OPERATING PRINCIPLES
vehicle to the desired height. After lifting,
immediately support the load with
appropriately rated jack stands BEFORE
working on the vehicle.
• With release valve closed, an upward
stroke of the jack handle draws oil from the
reservoir tank into the plunger cavity.
Hydraulic pressure holds the 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.)
• 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.
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.
• 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.
!
• Raise load high enough to clear the jack
stands, then carefully remove jack stands
(always used in pairs).
HOW TO USE YOUR JACK
• 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.
RAISING THE JACK
• Chock the vehicle wheels with appropriate
devices to prevent vehicle 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 under the load at
an appropriate lift point.
• 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.
• After removing jack from under the load,
push saddle down to reduce ram exposure
to rust and contamination.
6
MAINTENANCE
• When not in use, ALWAYS store jack with
saddle lowered all the way down.
MAINTAINING OIL LEVEL
Important: When adding or replacing oil,
ALWAYS use a good grade Hydraulic Jack
oil. 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. We
recommend Mobil DTE13M or equivalent.
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 tool tray and oil filler
screw and open release valve. Turn jack
over and drain old oil out through the oil
filler hole and into a suitable container.
• Refill with new oil through the oil filler hole.
DO NOT allow dirt or other foreign material
to enter the hydraulic system when filling.
• After refilling, remove any air from the
hydraulic system by opening the release
valve and rapidly pumping the jack handle
several times.
• Position the jack on level ground and fully
lower the saddle. (Ram will be all the way
in). Remove oil filler screw located under
tool tray (see Fig. 3 & 4).
• 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.
• Re-install oil filler screw and tool tray. The
jack is now ready to use.
LUBRICATION
• Add lubricating oil to all moving parts as
needed.
• Re-install oil filler screw and tool tray and
the jack is ready to use.
PREVENTING RUST
• Check ram and pump plunger (see Fig. 4)
every few months for any signs of rust or
corrosion. Clean as needed by wiping with
an oily cloth.
Release Valve
Oil Filler Screw
O-ring
Oil Filler Hole
Proper Oil Level
Ram all the way in
Plunger
Cylinder
FIG. 4
7
TROUBLESHOOTING
PROBLEM-SOLVING HINTS
Corrective Action
Symptom
Possible Causes
Jack does not lift load
• Release valve not tightly closed
• Ensure release valve is tightly closed
• 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 • Too much weight on jack
• Hydraulic unit malfunction
• Reduce weight on jack
• 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
Poor lift performance
• Fluid level low
• Ensure proper fluid level
• Air trapped in system
• With ram fully retracted, open release
valve, pump handle several times to
expel trapped air
• Ensure proper fluid level
Does not lift to full
extension
• Fluid level low
PARTS
MODEL NUMBER: 50239
The Model Number and Serial Number are found on the lifting arm and handle socket
respectively. Always mention the Model Number and Serial Number when requesting service
or repair parts for your jack.
PARTS ARE ONLY AVAILABLE IN ASSEMBLIES (except Saddle)
Key
Description
1
2
Saddle
Power Unit Assembly
Handle Assembly
Front Roller Assembly
Handle Socket
3
3
4
7
5
6
Rear Caster Assembly
Oil Filler Screw
2
7
1
5
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Operators Manual
Warning Label
6
4
FIG. 5
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Call 8:00 AM - 4:45 PM CST., Monday - Friday 1-888-332-6419
8
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