© 2019 Enerpac, All Rights Reserved.
19
10.0 TROUBLESHOOTING
Fault
Possible Cause
Corrective Action
Hoses difficult to assemble
1. Damaged coupler
2. Coupler locking collars
not fully screwed back
3. Internal pressure in head
assembly due to over
tightening puller
1. Replace coupler
2. Screw back collars
3. Unscrew puller
Oil is leaking from the hydralic
connection.
Connection is not seating
properly.
Tighten the connection.
Where applicable replace
connection components.
Pump does not operate
1. Air supply not connected
2. Air regulator closed
3. Start/stop valve closed
1. Connect air supply
2. Set air regulator
3. Operate valve
Pump is not building pressure
with oil return to tank valve
closed.
1. Oil return to tank valve
may be defective.
2. Check valve may be
sticking inside the pump
head.
1. Replace the return to tank
valve.
2. Tap the pump head ligtly
with a hide hammer. If this
fails the pump must be
stripped down.
Pump stalls prior to reaching
required pressure
1. Insufficient air supply
2. Air pressure regulator
1. Increase air supply
2. Adjust air regulator
Maximum pressure cannot be
achieved, even when pump is
running continuously
1. Leaking couplers
2. Leaking tensioner seals
3. Hydraulic oil return valve
4. Air in system
1. Replace suspect couplers
2. Replace suspect seals
3. Fully close valve or
replace
4. Run pump for short period
with oil return valve open
Pump runs erratically/jerky af-
ter a period of time
Foreign matter in hydraulic oil
Renew hydraulic oil
Pressure reading erratic
Defective gauge
Replace gauge
Rams do not stroke (with no
gauge pressure build up)
1. Open pump hydraulic oil
return valve
2. Leaking/burst hose
3. Leaking coupler/seals
4. Leaking tensioner seals
5. Defective pump unit
1. Close valve
2. Replace hose
3. Replace coupler/seals
4. Replace seals
5. Check pump for oil
delivery
