Jackco 66300B User Manual
MODEL 66300B
3 TON LOW PROFILE
FLOOR JACK
USER'S MANUAL
*This hydraulic jack conforms to all "ANSI / ASME" safety standards.
Jackco Transnational Inc. © 2010
South El Monte, CA
888-452-2526
To see more jackco products please visit our website at www.jackco.com
FOR YOUR SAFETY
• Read these safety instructions carefully and keep this manual in an easy to nd place as you may need to
use it again.
• Non-compliance with these rules may result in injury or damage to the jack or the vehicle.
• Do not modify the jack in any way.
• Never exceed the rated capacity of the jack.
• This jack is a lifting device only and should never be used to move the vehicle.
• The jack should be supported on a solid and level ground. Never use the jack in a surface where it may
sink into the ground.
• Ensure that there are no persons inside the vehicle to be lifted. Switch off the engine and apply the brake.
• Position the jack under the manufacturer’s recommended lifting point for the vehicle. Off-centered loads
can slip and accidents may result.
• During raising and lowering of the load, precautions should be taken to avoid movement of the vehicle.
Trafc may cause the raised vehicle to rock during roadside use of the jack.
• Never work under a raised vehicle without supporting it with mechanical/jack stands.
• Never position any part of your body near the movable parts of the jack.
• Ensure that there are no persons or obstructions underneath the vehicle prior to lowering.
• Do not adjust the overload bypass valve under any circumstance.
Use wheel chocks appropriately
.
SPECIFICATION
Capacity: 3 ton Saddle Diameter : 4.7 in
Min Height : 4.3 in Strokes to Max Height: 8
Max Height : 20.25 in Net Weight : 105.6 lbs
Dimension: 29.75 in (L) x 14.2 in (W)
PRIOR TO OPERATION
Air may become trapped in the hydraulic system during transit.
To Purge Air
1.Insert the handle into the socket and secure it with the set screw provided.
2.Turn the handle counterclockwise until release valve is open, pump the jack several times to purge the
accumulated air in the system.
3.Turn the handle clockwise to close the release valve. The jack is now ready to use.
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ASSEMBLY
Please refer to the exploded view drawing in this manual in order to identify parts:
1. Assemble the two handle halves together by depressing the spring-loaded button on the knurled handle
section (#7) and inserting the upper handle section into the lower section (#8). The spring-loaded button
should engage with the hole in the lower handle section.
2. Grease the inside of the handle yoke (#11) and remove the handle set screw (#10).
3. Install the handle assembly in the handle yoke until the bottom of the handle engages with the universal
joint assembly (#13).
4. Reinstall the handle set screw in the handle yoke making sure the screw secures the handle to the
handle yoke. Tighten the screw.
5. Air may become trapped in the hydraulic system during shipping and handling. Trapped air will affect the
pumping performance of the jack. If this occurs, follow the air pumping procedure below:
a) Remove the four screws that secure the cover plate (A) to the jack frame (B) so the oil ller screw (#37)
can be removed from the hydraulic power unit reservoir tube (#38).
b) With the lift arm (C) in its down position, look inside the oil ll screw hole. You should be able to see
the top of the power unit's cylinder (#35). The hydraulic uid level should be no higher than the top of
the cylinder. Correct the uid level if it is not at the proper height.
c) Pump the jack against a load that is at least 500 lbs. (225 Kgs).
After the load is raised, slightly turn the lift handle in a counterclockwise rotation so the load is very
slowly lowered.
While the lift arm is lowering, quickly pump the lift handle 5 or 6 full incremental pump strokes. After
pumping, lower the lift arm to its full rest position.
d) Install the oil ll screw (#37). Rotate the handle in a clockwise rotation until tight and pump the lift arm
to maximum height.
If the pumping condition has improved, repeat steps "a" through "d" until all of the air has been purged from
the system.
e) Install the cover plate (A) with the four screws.
OPERATING INSTRUCTION
To Lift a Vehicle:
Turn the handle clockwise.
Move the handle up and down. Use the full stroke of the piston for
greater speed.
Support the vehicle with appropriate jack stands.
To Lower a vehicle:
Lift the vehicle to remove the jack stands, ensuring that there are
no persons or obstructions under the vehicle. Turn the handle
counter-clockwise.
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