Enerpac PU-Series User Manual
Page 7
7
Problem
Possible Cause
Solution
Pump will not start.
No power.
Check electrical power source.
Wrong voltage.
Check voltage specifications on page 2.
Cylinder will not advance or retract.
Fluid level low.
Fill reservoir to proper level.
Intake screen clogged.
Clean or replace intake screen.
Valve in wrong position.
Shift valve to the pressure position.
Valve failure.
Have pump repaired by a qualified
hydraulic technician.
Cylinder advances and retracts
Air in the system.
Remove air from the system by opening
erratically.
and closing the tool until operation is
smooth.
External leak in system.
Tighten leaky connections. Replace
any damaged hoses and fittings.
Internal hydraulic leak.
Have pump repaired by a qualified
hydraulic technician.
Pump fails to maintain pressure.
External hydraulic leak.
Tighten leaky connections. Replace
any damaged hoses or fittings.
Internal hydraulic leak.
Have pump repaired by a qualified
hydraulic technician.
Low Fluid output.
Fluid level low.
Fill reservoir to the proper level.
Pump component parts are leaking.
Test to isolate leaks.
By-pass valve malfunction.
Have pump repaired by a qualified
hydraulic technician.
Fluid intake screens on piston blocks
Inspect intake screens. Flush all
may be clogged with debris.
components of contamination. Replace any
damaged components.
TROUBLESHOOTING CHART