Preventative Maintenance - Napa PROFESSIONAL LIFTING EQUIPMENT 791-6620 C Manuel De Fonctionnement

SETUP
PLEASE REFER TO THE EXPLODED VIEW DRAWING IN THIS MANUAL IN ORDER TO IDENTIFY PARTS.
1.
In order to install the handle assembly item #58 in the handle socket item #36, first align the main handle tube with the largest `hole in the
handle socket and the lock pin rod with the smaller hole in the handle socket.
2. Make sure the lock pin rod is in the down/lock position before insertion in the handle socket. Once the main handle tube and lock pin rod
are aligned with their respective holes in the handle socket, push the handle assembly in the handle socket so the end of the handle tube
engages the release valve mechanism in the bottom of the handle socket and the lock pin rod engages one of the three (3) locking holes
in the item #1 frame.
3. Disengage the lock pin rod by pulling up on the lever and engaging the lever with the slot in top of the handle assembly. The handle
assembly should be free to pump up and down.
4. In order to check for proper handle assembly alignment with the handle socket, see if the lock pin rod will engage with the three locking
holes in the frame. Also, turn the release valve knob at the top of the handle assembly left and then right to see if the release valve u-joint
in front and below the handle socket is rotating simultaneously with the turning of the knob.
5. Before Use: Air may become trapped in the hydraulic system resulting in insufficient pump stroke, spongy pump feeling or inability to
pump lift arm to maximum height. Follow the air purging instructions below:
PURGING AIR IN ORDER TO PUMP BY HAND PUMP OR FOOT PUMP
a. Rotate the knob at the top of the pump handle in a clockwise direction until tight. Now turn it in a counterclockwise direction 2 full
turns.
b. Activate the foot pedal #37 about 15 times.
c. Rotate the knob at the top of the pump handle clockwise until tight.
d. Activate the foot pedal until the lift arm is at maximum height.
e. If it still feels like you are not getting a full pump stroke, repeat steps "a" through "d" until all air is purged from the system.
PURGING AIR IN ORDER TO PUMP BY DEPRESSING THE AIR VALVE
a. With the lift arm fully retracted, rotate the knob at the top of the pump handle 2 full turns counterclockwise from its closed position.
b. Depress the air valve at the end of the hose for 20 seconds.
c. Turn the knob at the top of the pump handle in a clockwise direction until tight.
d. Depress the air valve to see if the jack pumps up normally.
e. If the condition feels better but still air trapped, turn the knob counterclockwise in order to lower the lift arm all the way down.
f. Now turn the knob clockwise until it stops and activate the foot pedal #37 to raise the jack's lift arm to maximum height.
g. Depress the air valve while simultaneously turning the knob 2 full turns in a counterclockwise direction. Continue to depress the air
valve until the lift arm comes all the way down. Turn the knob clockwise until it stops and pump normally.
OPERATING INSTRUCTIONS
This is the safety alert symbol used for the OPERATING INSTRUCTIONS section of this manual to alert you to potential
personal injury hazards. Obey all instructions to avoid possible injury or death. IMPORTANT: Before attempting to raise
any vehicle, check vehicle service manual for recommended lifting surfaces.
OPERATION:
1. To raise load: Turn the knob at the top of the handle assembly in a clockwise direction until tight. . Position the jack under the
load. Proceed to pump the handle in order to raise the lift arm to the load. As the saddle at the end of the lift arm gets closer to
the load, reposition the jack so the saddle will contact the load firmly and the load is centered on the saddle. Make sure the
saddle is correctly positioned. Raise the load to the desired work height. Place jack stands of appropriate capacity at the vehicle
manufacturers's recommended support areas that provide stable support for the raised vehicle. DO NOT CRAWL UNDER
VEHICLE WHILE LIFTING VEHICLE OR PLACING OR REMOVING THE JACK STANDS! Once jack stands are positioned,
turn the jack handle VERY SLOWLY in a counterclockwise direction to lower the load to rest on the jack stands. Inspect the
relationship between the jack stands and load to make sure the setup is stable and safe. If the setup is not stable or safe, follow
the preceding steps until corrected.
2. To lower load: Follow the procedures mentioned in "To raise load" section of the OPERATING INSTRUCTIONS in order to raise
the load off the jack stands. Once the load has cleared the jack stands, remove the jack stands from under the load and away
from the work area. Turn handle very slowly in a counterclockwise direction until the load is completely lowered to the ground.
Once the jack's lifting saddle has cleared the load, remove the jack from under the load. CAUTION: Keep hands and feet away
from the hinge mechanism of the jack.

PREVENTATIVE MAINTENANCE

This is the safety alert symbol used for the PREVENTATIVE MAINTENANCE section of this manual to alert you to potential
personal injury hazards. Obey all instructions to avoid possible injury or death.
IMPORTANT: The number one cause of jack failure in air/hydraulic jacks is dirt and moisture in the air motor and/or hydraulic system.
The shop air supply should be equipped with water and dirt filter traps that should be emptied or cleaned according to a monthly
maintenance schedule. An in line oil lubricator will extend the life of air/hydraulic jacks. Inoperable jacks caused by poorly equipped or
maintained shop air systems are not eligible for warranty consideration. Contaminants can also enter the air/hydraulic system when
the shop air line is disconnected from the jack air line and the line is dropped on the floor. Contaminants in the air couplers, once reconnected,
will be driven into the system.
791-6620 C
OPERATING MANUAL & PARTS LIST FOR 791-6620 C
3 rev. 03/28/12