17
8.0 TROUBLESHOOTING
The information in the Troubleshooting Guide (refer to Table 10) is
intended as an aid to help diagnose and correct various possible
problems that may occur.
For repair service, contact your local Enerpac Authorized Service
Center. Only an Enerpac Authorized Service Center should
service the jack and its components.
WARNING
Failure to observe and comply with the following precautions
could result in death or serious personal injury. Property
damage could also occur.
• Never tighten or loosen hydraulic fittings while jack hydraulic
system is pressurized. Escaping oil under pressure can
penetrate the skin, causing serious personal injury.
• Keep hands, fingers and other body parts clear of pinch
points and moving parts when observing operation during
troubleshooting.
• To prevent injury, always be sure the jack air shut-o
ff
valve
is in the CLOSED position and that the air supply hose is
disconnected before beginning any maintenance, adjustment
or repair procedures. Be certain that any trapped pressure is
completely relieved as described in Section 7.2 of this manual.
Table 10 - Troubleshooting Guide
Symptom
Possible Cause
Solution
1. Sporadic cylinder
action and/or sluggish
operation.
a. Air trapped in hydraulic system.
Cycle cylinder up and down several times to bleed trapped air.
b. Low oil level in hydraulic reservoir.
Add Enerpac HF oil as required.
c. Insu
ffi
cient compressed air pressure
or volume.
Check air pressure at filter/regulator. Increase regulator setting if pressure
shown on gauge is too low.
If necessary, increase volume of compressed air or increase size of supply
air line to meet airflow and pressure requirements.
d. Clogged or blocked pump intake
screen.
Have hydraulic reservoir and intake screen flushed and cleaned by
Enerpac Authorized Service Center.
e. Pneumatic control circuit components
leaking, worn, damaged or out of
adjustment.
Have pneumatic control circuit inspected by Enerpac Authorized Service
Center. Repair or replace components as required.
f. Seal wear, internal leakage, worn
components and/or other internal
damage.
Have hydraulic system inspected by Enerpac Authorized Service Center.
Repair or replace components as required.
2. Noisy operation.
a. Air trapped in hydraulic system.
Cycle cylinder up and down several times to bleed trapped air.
b. Low oil level in hydraulic reservoir.
Add Enerpac HF oil as required.
c. Air mu
ffl
er missing or damaged.
Replace air mu
ffl
er.
d. Air leaks in hydraulic system.
Check all points where air might leak into system. Tighten, repair or replace
components as required.
e. Clogged or blocked pump intake
screen.
Have hydraulic reservoir and intake screen flushed and cleaned by
Enerpac Authorized Service Center.
f. Air motor worn or damaged.
Have air motor inspected by Enerpac Authorized Service Center. Repair or
replace components as required.
3. Oil is overheating.
a. Low oil level in hydraulic reservoir.
Add Enerpac HF oil as required.
b. Oil viscosity too high or too low.
Drain oil from reservoir and refill with Enerpac HF oil.
c. Excessive cycling of cylinder.
Reduce cycling of cylinder. Allow time for oil to cool between lifts.
d. Jack is overloaded.
Reduce load or use a di
ff
erent jack of higher capacity.
NOTICE:
Oil may overheat if jack is overloaded, and oil runs over the relief
valve for a prolonged period of time.
e. High pressure leakage at the pump.
Have hydraulic system inspected by Enerpac Authorized Service Center.
Repair or replace components as required.
(Continued on next page)
