Craftsman PROFESSIONAL 50234 Operator's Manual page 4

OPERATION
Lifting
1. Place vehicle in park, with emergency brake on
and wheels securely chocked to prevent
accidental vehicle movement.
2. Locate and close release valve by turning handle
clockwise, firmly. Position jack saddle under lift
point.
3. Verify lift point, then pump handle to contact lift
point. To lift, pump handle until load reaches
desired height.
Note: Model 50238 features a 2 speed hydraulic
system that allows the lift arm to be raised to the lift
point in 1 or 2 strokes of the handle. After the load is
contacted, 2 or 3 additional pumps may be required
to fill the low pressure cavity of the hydraulic system
and begin the high pressure,
approximately .5" - .75" inches per full handle
stroke. Model 50234 features a foot (or hand)
operated pedal that is integral to the pump piston
assembly. This allows the user to raise the jack
saddle to contact the load without pumping through
the full arc of the operating handle.
4. Transfer the load immediately to appropriately
rated jack stands.
CAUTION: Use the handle provided with this product
or an authorized replacement handle to ensure
proper release valve operation. When using to lift
vehicle, lift only on the manufacturer's
recommended lift points. Refer to your vehicle
owner's manual.
Lowering
1. Raise load high enough to clear the jack stands,
then carefully remove those jack stands (always
used in pairs).
2. Slowly turn the handle counterclockwise,
more than 1/2 turn. If the
a. Use another jack to raise the vehicle high
enough to re-install 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,
more than 1/2 full
load lifting process
but no
load fails to lower:
but no
turn.
Important: Use only a good grade hydraulic jack oil.
Avoid mixing different types of fluid and NEVER use
brake fluid, turbine oil, transmission
glycerin. Improper fluid can cause failure of the jack
and the potential for sudden and immediate loss of
load.
Adding oil
1. With saddle fully lowered and pump piston fully
depressed, set jack in its upright, level position.
Locate and remove oil filler plug/screw.
2. Fill with oil until just below the rim of the oil filler
plug hole. Reinstall the oil filler plug/screw.
Changing oil
For best performance and longest life, replace the
at
complete fluid supply at least once per year.
1. With saddle fully lowered and pump piston fully
depressed, remove the oil filler plug/screw.
2. Lay the jack on its side and drain the fluid into a
suitable container.
Note: Dispose of hydraulic fluid in accordance
with local regulations.
3. Fill with oil until just below the rim of the oil filler
plug hole. Reinstall the oil filler plug/screw.
Lubrication
1. A periodic coating of light lubricating oil to pivot
points, axles and hinges will help to prevent rust
and assure that wheels, casters and pump
assemblies move freely.
Cleaning
Periodically check the pump piston and ram for
signs of rust or corrosion. Clean as needed and
wipe with an oily cloth.
Note: Never use sandpaper or abrasive material on
these
Storage
When not in use, store the jack with pump piston
and ram fully retracted.
4
MAINTENANCE
surfaces !
fluid, motor oil or