7800A
4
rev. 02/09/17
TROUBLESHOOTING
PROBLEM
ACTION
1. Unit will not lift rated load.
Purge air from hydraulic system by following procedure under SETUP.
2. Unit will not sustain rated load or feels “spongy” under rated load.
Purge air from hydraulic system as above.
3. Unit will not lift to full height.
Purge air from hydraulic system as above.
4. Handle tends to raise up while the unit is under rated load.
Pump the handle rapidly several times to push oil past ball
valves in power unit.
5. Unit still does not operate.
Contact Sunex authorized hydraulic service center.
OWNER'S MANUAL
IMPORTANT:
In order to prevent seal damage and jack failure, never use alcohol, hydraulic brake fluid, or transmission oil in the
jack. Use Hydraulic Jack Oil.
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. Contact Sunex for a replacement label if your jack's label is
unreadable.
5. Inspect the jack before each use. Do not use the jack if any component is cracked, broken, bent, shows sign of damage or leaks
hydraulic fluid. Do not use the jack if it has loose or missing hardware or components, or is modified in any way. Take corrective
action before using the jack again.
NOTE:
Disassembly of this tool by other than an authorized service center
will void
the war ran ty on this tool.
