Enerpac HXD-Series - Manual (Page 11)

11
PROBLEM POSSIBLE CAUSE
1. No pressure
build-up at
wrench, and/or
wrench will not
advance.
A. No power supply or air supply.
B. Pump motor does not rotate
due to wrong voltage supply.
C. Blown out fuses (E-motor)
D. Direction of electric motor
rotation not correct.
E. Couplers at pump and wrench
side not completely
connected.
F. Oil level in pump too low
G. Pressure setting of relief valve
on pump too low.
H. Leakage in pump or wrench.
I. Defective pressure gauge.
J. Incorrectly mounted hoses.
A. Plug in all connections.
B. Check voltage setting
C. Replace fuses.
D. Change wiring of power cable.
E. Depressurize the hoses and
switched off pump, retighten
couplers by hand.
F. Add oil. See pump instructions.
G. Increase pressure by adjusting
pump relief valve. Do not exceed
max. pressure or torque.
H. Determine if leakage is in the
pump or the wrench. Contact your
Enerpac Service Center for
assistance.
I. Connect a second glycerine filled
pressure gauge, adjust pressure on
pump and check both gauge
values.
J. Change hose positions
according to illustration on
page 7: (P to P) and (T to T).
10
2. Safety valve at
retract side (T) of
wrench opens.
A. Couplers at retract side of
wrench and pump not
completely connected.
B. Incorrectly mounted hoses.
A. When pump is running, switch,
using the remote control, the valve
position from (P or A) to (T or B)
and reverse to depressurize the
system. Switch off the pump and
tighten couplers by hand.
B. Change hose positions
according to illustration on
page 7: (P to P) and (T to T).
10
3. Hoses can not
be disconnected
from wrench or
pump.
A. Pressure remaining in double-
acting hydraulic system.
B. Hydraulic system too warm.
A. When pump is running, switch,
using the remote control, the valve
position from (P or A) to (T or B)
and reverse to depressurize the
system. Switch off the pump and
disconnect the hoses.
B. Cool the hydraulic system, protect
it against heat and repeat solution
3A above to disconnect hoses.
SOLUTION
7.0 TROUBLESHOOTING
The table below is intended to be used as an
aid in determining if a problem exists.