Enerpac WU Serie Hoja De Instrucciones página 5

8.0 PRESSURE SWITCH ADJUSTMENT
All Enerpac WUD pumps are equipped with a user-adjustable
pressure switch. The switch is designed to stop the pump when
the desired clamping pressure is reached. Make adjustments as
described in the following steps:
1. Loosen switch jam nut counter-clockwise.
2. Using a 10 mm wrench, turn switch adjustment screw
clockwise to increase or counter-clockwise to decrease
pressure (see Figure 10).
3. Tighten switch jam nut to 3 ft-lbs [4 Nm] clockwise while
holding pressure setting with wrench.
4. Use the pump pressure gauge to verify that the desired pump
shut-off setting has been obtained.
WARNING: Ensure that the user-adjustable relief valve
setting is set slightly above the pressure switch setting.
Failure to observe this precaution could result in personal
injury and/or equipment damage in the event of switch failure.
Figure 10, Pressure Switch
9.0 MAINTENANCE
9.1 Checking the Oil Level
Check reservoir hydraulic oil level every 40 hours of operation.
Add oil when necessary to bring the level to 1/2" [1 cm] below
the fill opening. Use only Enerpac hydraulic oil. The use of other
oils or fluids may damage your system, and will void your Enerpac
warranty.
9.2 Changing the Oil
Completely drain the reservoir after every 100 hours of operation.
Refill with new Enerpac hydraulic oil. If pump is operated in
very dusty areas or at high temperatures, drain and refill more
frequently.
To drain and refill the reservoir:
1. Remove the vent/fill cap from the top right hand corner of the
reservoir (see Figure 4).
2. Tip the pump until all old oil is drained.
IMPORTANT: Dispose of used oil in accordance with all applicable
laws and regulations.
3. Refill with new oil through the vent/fill cap opening. Refer to
Section 3.0 for the usable oil capacity for your pump model.
4. Reinstall vent/fill cap.
9.3 Cleaning the Reservoir
The pump reservoir can be removed for cleaning. If the pump is
frequently operated in a dusty environment, the reservoir should
be cleaned at least once a year.
To clean the reservoir:
1. Drain the reservoir as described in steps 1 and 2 of Section
9.2.
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.
6. Add oil to pump as described in steps 3 and 4 of Section 9.2.
Note: If the pump requires repairs, contact an Enerpac Authorized
Service Center.
9.4 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.
Jam Nut
Adjustment
Screw
10.0 TEST STANDARDS
10.1 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).
10.2 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.
11.0 TROUBLESHOOTING
(Refer to Troubleshooting Chart on the following page)
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.
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DANGER: To avoid possible electrocution, pump must
be completely disconnected from electrical power before
brush servicing is attempted.