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5

KNOW YOUR JACK
(refer to Fig. 3, page 4)

• Compare these illustrations with your jack

BEFORE operation and/or oil level
maintenance to become familiar with the
location of various jack components.

BEFORE USE

Occasionally during shipment and/or
handling, air gets trapped in the hydraulic
s y s t e m ,   w h i c h   i n t e r f e r e s   w i t h   j a c k
performance. To release this trapped air do
the following:

1. Using the end of the assembled handle

which is formed to fit the release valve,
engage and open the release valve by
turning it counterclockwise no more than
1/2 full turn from a fully closed position.

2. With the jack in the upright position,

remove the oil filler plug. Insert the handle
into the handle socket, then pump 6 to 8
full strokes.

3. Ensure that the oil is level with the oil filler

plug hole, then reinstall oil filler plug. If low,
add oil as described in the Maintenance
Section (see page 7).

4. Ensure that the pump operates smoothly

before putting into service. Lubricate as
instructed in the Maintenance Section (see
page 7).

OPERATING PRINCIPLES

• With the 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 and raises the saddle.

• 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 overextended 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.

OPERATION

HOW TO USE YOUR JACK
(refer to Fig. 3, page 4)

RAISING THE JACK

1. When lifting a vehicle, place the vehicle in

park, engage emergency brake and chock
the tire(s) diagonally opposite the tire(s)
being raised to prevent inadvertent
movement forward and backward. Use
wheel chocks which are rated for the tire
dimension of your vehicle.

2. Locate the release valve and, using the

provided handle, engage the release valve
and turn handle clockwise until firm
resistance to further thread engagement
is felt. Center the jack saddle under
manufacturers recommended lift point.

To  avoid crushing injuries and

property damage: 

NEVER

 place yourself

or others under a load for the purpose of
pumping the handle socket. Use 

ONLY

 the

handle provided.

3. Verify lift point, insert handle into the

handle socket and pump to contact the lift
point. To lift, continue pumping until load
reaches desired height.

4. Immediately after lifting, transfer the load

to a pair of appropriately rated jack stands.

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 

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.

!

!

Summary of Contents for 50284

Page 1: ...50285 20 Ton Capacity Sears Roebuck and Co Hoffman Estates IL 60179 Visit our Craftsman website www sears com craftsman Printed in China 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 U S Patent 5 946 912 ...

Page 2: ...d knowledge Instructions and safety information shall be conveyed in the operator s native language before use of this jack is authorized If any doubt exists as to the safe and proper use of this jack remove from service immediately Inspect before each use Do not use if broken bent cracked or damaged parts including labels are noted Any jack that appears damaged in any way operates abnormally or i...

Page 3: ...r the influence of drugs or alcohol DO NOT use this device to lift level lower support adjust or otherwise move a house mobile home travel trailer camper or building structure of any type size or configuration X Study understand and follow all instructions provided with and on this device before use Do not exceed rated capacity This is a lifting device only After lifting immediately transfer the l...

Page 4: ...holder portion away from the handle socket so that it does not interfere with the release valve and handle socket operation Assemble the handle sections by lining up the spring detent in the rubber grip section with the slot in the other section A Handle B Handle Socket C Oil Filler Plug D Saddle E Oil Reservoir F Cylinder G Ram H Release Valve I Screw Extension J Plunger K Carrying Handle L Top N...

Page 5: ...am 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 OPERATION HOW TO USE YOUR JACK refer to Fig 3 page 4 RAISING THE JACK 1 When lifting a vehicle place the vehicle in park engage emergency brake and chock the tire s diagonally opposite the tire s being raised...

Page 6: ...ase Dimension B not shown 5 1 8 in X 5 1 4 in 5 15 16 in X 6 1 4 in C Maximum Height 18 5 8 in 473mm 18 11 16 in 475mm D Minimum Height 9 7 16 in 240mm 9 1 2 in 242mm E Hydraulic Stroke travel 6 in 6 in F Extension Screw Travel 3 1 8 in 3 1 8 in 50284 50285 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 ...

Page 7: ...lled to the level of the oil filler plug hole If low add oil as needed REPLACING OIL To drain oil remove oil filler plug and open release valve see Fig 3 Turn jack on its side and drain old oil out through the oil filler plug hole Refill with new oil through the oil filler plug hole DO NOT allow dirt or other foreign material to enter the hydraulic system when filling After refilling remove any ai...

Page 8: ... AND SOLUTIONS Refer to Operation and Maintenance procedures for detailed information Release valve not tightly closed To close or tighten turn release valve clockwise Air is in hydraulic system Release air from system See BEFORE INITIAL USE Oil level is low in jack Add oil as required 1 If ram is still extended after load is removed manually push down saddle 2 Oil reservoir is over filled Drain o...

Page 9: ...nstallation of home appliances and items like garage door openers and water heaters www sears com www sears ca Our Home For repair of carry in items like vacuums lawn equipment and electronics call or go on line for the location of your nearest Sears Parts and Repair Center 1 800 488 1222 Call anytime day or night U S A only www sears com To purchase a protection agreement U S A or maintenance agr...

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