Enerpac PU-Series - Manual (Page 6)

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2. Tip the pump until all old oil is drained.
3. Refill with new oil through the same opening. Reservoir
capacity is .75 gal. (2,8 l) or 1.5 gal. (5,7 l) depending on model.
4. Replace fill plug (F).
Figure 10
7.3 Cleaning the Reservoir
The pump reservoir can be removed for cleaning. If the pump is
constantly used in an extremely dusty environment, the reservoir
should be cleaned once a year.
1. Drain the reservoir as described in steps 1 and 2 in "Changing
the Oil".
2. Remove the six screws securing the shroud to the reservoir.
Lift the shroud off the reservoir. A foam cushion wraps around
the motor to keep electrical wires away from the motor. Use
caution to avoid damaging or pulling wire connections off the
terminals.
3. Remove the eight screws holding the pump to the reservoir.
Lift the pump off the reservoir and remove the gasket.
4. Thoroughly clean the reservoir with a suitable solvent.
5. Re-assemble the pump and reservoir, installing a new gasket.
Position the shroud over the motor with the shroud handle
facing the valve side of the pump. Install the six mounting
screws and internal/external lock washers.
If the pump requires repair work, contact a local Authorized
Enerpac Service Center.
7.4 Motor Brushes
Check the electric motor brushes at least once every two years.
For pumps in heavy usage applications, check the brushes at
least once every six months.
DANGER: To avoid possible electrocution, pump must be
completely disconnected from electrical power before
brush servicing is attempted.
8.0 TROUBLESHOOTING (See Chart)
The Troubleshooting Chart is intended as a guide to help you
diagnose and correct various possible pump problems.
Only qualified hydraulic technicians should troubleshoot and
service the pump. For repair service, contact the Enerpac
Authorized Service Center in your area.
8.1 Circuit Breaker (Pumps with Date Code “F” and Later)
In the event of an electrical overload, the pump circuit breaker
will trip. After investigating and correcting the source of the
overload, push the circuit breaker button to reset.
8.2 Fuses (Pumps With Date Code “F” and Later)
Internal fuses protect the primary and secondary circuits of the
control transformer. If a fuse blows, investigate and correct the
source of the failure. Then, replace the blown fuse with a new
fuse of the correct rating. For fuse ratings, refer to the Repair
Parts Sheet for your pump model.
WARNING: Always disconnect electrical power before
replacing fuses.
Note: Fuses are not used on the following pumps:
• Pumps manufactured before Date Code “F”.
• Models not equipped with pendant (all date codes).
9.0 TEST STANDARDS
9.1 Canadian Standards Association (CSA)
Where specified, pump assemblies meet the design assembly
and test requirements of CSA, the Canadian Standards
Association (Refer to CAN/CSA — C22.2 No. 68-92, Motor
operated appliances).
9.2 Conformité Européene (CE)
Where specified, an EC Declaration of Conformity and CE
marking of product is provided. These products conform to
European Standards EN982:1996, EN1050:1998 and EN-ISO-
12100-1&2:2003, and to EC Directives 2006/42/EC, 97/23/EC,
2004/108/EC, 2006/95/EC and 97/23/EC.