Craftsman 50145 Speedy Lift User manual

Operators Manual
3-1/2 TON CAPACITY
FLOOR JACK Model No. 50145
• Safety
• Assembly
• Operation
• Maintenance
• Parts
Sears, Roebuck and Co., Hoffman Estates, IL 60179
Visit our Craftsman website: www.sears.com/craftsman
Printed in China
CAUTION: Before using this product, read
this manual and follow all its Safety Rules
and Operating instructions.

TABLE OF CONTENTS
Warranty .....P. 2
Save these instructions .....P. 2
Safety instructions .....P. 3
Assembly .....P. 3
Operation .....P. 4
Maintenance .....P. 5
Troubleshooting .....P. 6
Parts .....P. 6
Service .....Back cover
WARRANTY
ONE YEAR FULL WARRANTY ON CRAFTSMAN PROFESSIONAL FLOOR JACK
If this Craftsman Professional floor jack fails to give complete satisfaction within one year
from date of purchase, RETURN IT TO THE NEAREST SEARS STORE OR SEARS
PARTS & REPAIR CENTER IN THE UNITED STATES, and Sears will repair it, free of
charge.
This warranty gives you specific legal rights, and you may also have other rights which vary
from state to state.
Sears, Roebuck and Co., Dept 817WA, Hoffman Estates, IL 60179
SAVE THESE INSTRUCTIONS
For your safety, read, understand, and follow the information provided with and on this jack.
• The owner and operator of this equipment shall have an understanding of this jack and
safe operating procedures before attempting to use. The owner and operator shall be
aware that use and repair of this product may require special skills and 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 is missing parts, shall be removed from service immediately.
• If the jack has been or suspected to have been subjected to a shock load (a load
dropped suddenly, unexpectedly upon it), immediately discontinue use until jack has
been checked by a Sears or other qualified service center. It is recommended that an
annual inspection be done by qualified personnel.
• Labels and Owner’s Manuals are available from Sears (see PARTS section on page 6).
2

CAUTION BEFORE USING
Occasionally during shipment and/or
handling the hydraulic oil can become
SAFETY INSTRUCTIONS
unstable or air can get trapped in the
system, both of which can interfere with the
jacks lifting performance.
• To stabilize the oil it is recommended to
cycle the jack a few times prior to putting
a load on it.
• To release air from the hydraulic system:
• Open the release valve by turning the
jack handle counterclockwise, but never
by more than 1/2 full turn at a time.
• Remove the oil filler plug from the
cylinder. (see Fig. 4)
• Rapidly pump jack handle through
several full strokes.
• Reinstall the oil filler plug into the
cylinder again and jack is now ready to
use.
BEFORE EACH USE
Make a visual inspection before each use
of the floor jack by checking for abnormal
conditions, such as cracked welds, leaks
and damaged, loose, or missing parts.
DAMAGE TO JACK
If you think jack has been subjected to an
abnormal load or shock, have it inspected
for damage at a Sears Service Center
before using it again.
ASSEMBLY
FIG. 1 FIG. 2
TO ASSEMBLE THE TWO
PIECE HANDLE
1. Screw out the bolt which located in either
piece of handle (see fig. 1).
2. Comment the two handle pieces
together by insertion with the drilled hole
on the end of both pieces are coincide.
3. Screw up and tighten the bolt.
TO ASSEMBLE THE HANDLE
INTO THE SOCKET
1. Insert the handle into the socket. (see
fig. 2)
2. Slowly turn the handle until the pin
attached inside the handle is entirely
engaged in the slot on the release valve.
3. Tighten the screw on the socket.
Bolt
!
3
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.
• Never work on, under, or around a load
supported only by this device.
• Do not move or dolly the vehicle while
on the jack.
• No alterations shall be made to this
product.
• Only attachments and/or adapters
supplied by the manufacturer shall be
used.
• Failure to heed product markings or
warnings may result in personal injury
or property damage.

4
OPERATION
KNOW YOUR JACK
Compare Fig. 3 illustration with your jack
BEFORE operation to become familiar with
the location of various jack components.
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.)
• 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.
• 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
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.
• 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.
SPECIFICATIONS
Rated Capacity: 31/2Ton/7000 Lbs
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.)
FIG. 3
Jack Handle
Handle Socket
Release Valve
Rear Castor
Front Wheel
Saddle
Lifting Arm

5
MAINTENANCE
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.
ADDING OIL
• Position the jack on level ground and
fully lower the saddle. (Ram will be all the
way in). Remove oil filler plug 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 plug and tool tray. The
jack is now ready to use.
LUBRICATION
• Add lubricating oil to all moving parts as
needed.
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.
FIG. 4
• When not in use, ALWAYS store jack with
saddle and pump plunger lowered all the
way down.
ANNUAL INSPECTION
To ensure that it is in optimum condition,
annual inspection of the jack at a Sears
Service Center is recommended.
REPLACING OIL
• To drain oil, remove tool tray and oil filler
plug and open release valve. Turn jack
over and drain old oil out through the oil
filler hole.
Note: Dispose of hydraulic oil in
accordance with local regulations.
• Refill with new oil through the oil filler
hole. DO NOT allow dirt or 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.
• Re-install oil filler plug and tool tray and
the jack is ready to use.
Ram all the way in
Oil Filler Plug
Proper Oil Level
PLUNGER DOWN

Key Parts Description
1 5955 Saddle
2 5954 Power unit assembly
3 5952 Jack handle assembly
4 5951 Front wheel assembly
5 5953 Jack handle gear assembly
6 5956 Rear wheel assembly
- 5957 Owners manual
6
TROUBLESHOOTING
PROBLEM-SOLVING HINTS
FIG. 5
PARTS
MODEL NUMBER: 50145
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)
5
3
2
1
4
Symptom Possible Causes Corrective Action
Jack will not lift load
Jack bleeds off
(starts to lower) after lift
Jack will not lower after
unloading
Poor lift performance
• Release valve not tightly closed
• Overloaded - too much weight on jack
• Release valve not tightly closed
• Hydraulic unit malfunction
• Oil reservoir overfilled
• Linkages binding
• Fluid level low
• Air trapped in system
• Ensure release valve is tightly
closed
• Reduce weight on jack
• Ensure release valve is tightly
closed
• Replace power unit assembly
• Drain fluid to proper level
• Clean and lubricate moving parts
• Ensure proper fluid level
• With ram fully retracted, open
release valve, pump handle several
times to expel trapped air
Will not lift to full
extension • Fluid level low • Ensure proper fluid level
6

7
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