Setup Instructions - MAC TOOLS JB20T Manual Del Propietário

SETUP INSTRUCTIONS

WARNING
Failure to follow these Setup Instructions may result in serious injury or death, and/or property damage.
1. Refer to the exploded view drawing on page 5 to identify jack components.
2. Assemble the pump handle sections together to make one complete handle. One end of the handle has a cut out that will fit over the cross pin in the release
valve in the base of the jack. This connection enables the user to turn the release valve in a clockwise direction until tight in preparation for pumping the
jack and raising the load. Slowly turning the release valve in a counterclockwise direction will lower the load. It is not necessary to open the release valve
more than two full rotations.
3. The opposite end of the pump handle must be inserted in the pump piston receiver linkage in preparation for pumping the jack. Install an air quick
disconnect fitting of your choice in the back of the air valve. The jack can be pumped up manually or by depressing the air valve.
4. The ram is that portion of the jack which extends when the jack is pumped. There is a round saddle at the end of the ram which is the part that makes
contact with the load to be lifted. The saddle is actually part of a threaded extension screw that fits on the inside of the ram. The saddle height can be
extended by turning it in a counterclockwise direction. Extending the height of the saddle sometimes is necessary when the full stroke of the ram is not
adequate to lift a load to its desired work height.
5. Sometimes air gets trapped in the hydraulic system during shipment. An air bound hydraulic system feels spongy when pumped and may not allow the
jack to pump full incremental strokes.
PURGING AIR FROM THE HYDRAULIC SYSTEM:
a. Open the release valve by turning the handle in a counterclockwise direction two full turns from its closed position.
b. Pump the handle ten full strokes.
c. Close the release valve by turning the handle in a clockwise direction until tight.
d. Pump the jack until the ram is extended to maximum height.
e. Repeat steps "a" through "d" until air is purged from the system.
OPERATING INSTRUCTIONS
WARNING
Failure to follow these Operating Instructions may result in serious injury or death, and/or property damage.
1. Do not lift more than one wheel of a vehicle at a time. Activate the hazard warning flasher, turn off ignition, move automatic selector to park position or
reverse gear if it is a manual transmission and set parking brake. The wheel diagonally opposite from the wheel being lifted shall be chocked in both
directions. Consult the vehicle manufacturer for the tire changing procedure and lift points.
2. Position the jack at the appropriate lift point. Estimate the required ram travel to raise the load to the desired height. If the desired height exceeds the
entire ram travel, unscrew the extension screw to make up the difference.
3. Pump the jack up until the saddle comes close to the lift point. Make sure the lift point is flat, parallel to the ground and free from grease, any kind of
lubricant, or debris. Continue pumping the jack to lift the load to the desired height. During lifting, inspect the position of the jack in relation to the ground
and the saddle in relation to the load to prevent any unstable conditions from developing. If conditions look like they are becoming unstable, slowly lower
the load and make appropriate setup corrections after the load is fully lowered.
4. When the load is lifted to its desired height, immediately place jack stands in their designated locations and adjust the stands' support columns up as close
to the designated supports points as possible. Although jack stands are individually rated, they are to be used in a matched pair to support the load. Slowly
and carefully open the release valve of the jack in order to gently lower the load onto the jack stands. Make sure the load is safely supported by the jack
stands' saddles and not the locating lugs of the saddles. Inspect the relationship of the jack stands with the ground and the jack stand columns and
saddles with the load to prevent any unstable conditions. If conditions look unstable, close the jack's release valve and pump the jack to raise the load off
the jack stands. Make the appropriate setup changes and slowly and carefully lower the load onto the jack stand saddles.
5. After the work is done, close the release valve and pump the jack high enough to remove the load from the jack stand saddles. Be sure the load is stable. If
it is not, lower the load back onto the jack stands. Make appropriate setup corrections and repeat the step again. Remove the jack stands from under the
load, being very careful not to move the load.
6. Open the jack's release valve very slowly and carefully to lower the load to the ground.
JB20T
JB20T
20-TON
AIR/HYDRAULIC BOTTLE JACK
3
CAPACITY
5/13/16