Enerpac AVBOLT Manuel D'instructions page 52

Fault Diagnosis
SYMPTOM
Pump fails to build
pressure or less than
full pressure
Pump builds full
pressure, but pintail
does not break
Placing tool piston will
not return
Placing tool does not
eject the collar from
the anvil
Piston does not auto-
return or auto-returns
erratically.
Pump runs hot
Pump pressure goes
above "HI PRESS"
value.
24
POSSIBLE CAUSE
Low oil level
Relief valve set too low
External system leak
Internal leak in pump
Internal leak in valve
Internal leak in system
component
Breakload greater than placing
tool capacity at full pressure.
Flow to placing tool blocked
High Pressure value or Pull /
Advance Pressure relief valve
value set too low
Return flow restricted or blocked
Hydraulic hoses not connected
Valve malfunction
Cylinder return spring broken
Return Timer setting incorrect -
set too low
Return pressure relief valve set
too low
Pressure relief valve setting at or
below the High Pressure value
High Pressure value below 96
bar
Advance or retract flow restricted
High ambient temperature
Cylinder comes to a sudden stop
(i.e., strokes out)
REMEDY
Add oil - refer to Putting into
Service and Maintenance and
Servicing
Adjust Pull/Advance Pressure
Relief Valve and High Pressure
setting
Inspect and repair or replace
See authorized service center
See authorized service center
See authorized service center
Refer to placing tool Instruction
manual
Check hydraulic couplers for full
engagement
Adjust Pull/Advance Pressure
Relief Valve and High Pressure
setting
Check couplers for full
engagement and/or fault
Check for correct connections at
pump and placing tool
See authorized service center
See authorized service center
Adjust Return Timer to
recommended setting
Adjust return pressure relief valve
to correct setting
Set user adjustable relief valve
30 bar above "HI PRESS"
Increase High Pressure value
above 96 bar
Check couplers for full
engagement
Set user adjustable relief valve
30 bar above "HI PRESS" valve to
redirect excess oil flow
PAGE REF.
11, 12, 21,
22
18, 19
18, 19
17
19, 20
18, 19
14, 18
18, 19