operating ManUal & parts list for 791-7330
791-7330
3
Rev. 08/04/10
tRoubleshootING
PRObLEM
ACTION
1. Unit will not lift load.
Purge air from hydraulic system by following procedure
under SETUP.
2. Unit will not sustain load or feels “spongy”
under load.
Purge air from hydraulic system as above.
3. Unit will not lift to full height.
Purge air from hydraulic system as above.
4. Unit still does not operate.
Contact authorized service center. For a complete list of
authorized hydraulic repair centers please visit www.
toolwarrantyrepair.com.
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 sys-
tem. The shop air supply should be equipped with water and dirt filter traps that should be emptied or cleaned accord-
ing 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. Contami-
nants 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.
1. Always store the jack in a well protected area where it will not be exposed to inclement weather, corrosive vapors, abrasive dust,
or any other harmful elements. The jack must be cleaned of water, snow, sand or grit before using.
2. Lubricate moving parts with SAE 30 oil. Keep jack clean.
3. It should not be necessary to refill or top off the reservoir with hydraulic fluid unless there is an external leak. An external leak
requires immediate repair which must be performed in a dirt-free environment by qualified hydraulic repair personnel who are
familiar with this equipment.
IMPORTANT: In order to prevent seal damage and jack failure, never use alcohol, hydraulic brake fluid or
transmission oil in the jack.
4. Every jack owner is responsible for keeping the jack labels clean and readable. Use a mild soap solution to wash external surfaces
of the jack but not any moving hydraulic components.
5. Do not attempt to make any hydraulic repairs unless you are a qualified hydraulic repair person that is familiar with this
equipment. Repairs must be performed by an authorized service center.
WARRANty
Please contact your local NAPA Auto Parts Store for details on warranty.
