4
When starting gasoline engine models after
transporting or after removing from storage, it will be
necessary to operate priming pump on left front of
instrument panel (see Figure 5). Pull knob on priming
pump out and push in several times to push oil into
pump assembly and fill intake line.
Refer to Manufacturer’s operating manual supplied
with pump for starting and operating procedure for
gasoline engine.
Figure 5
5. Valve Operation — Listed below are the valve
positions and operations.
6. Relief Valve Adjustment — The pumps are equipped
with two relief valves. One is a safety relief, factory
set and must not be adjusted or repaired, except by
an Authorized Enerpac Technical Service Center.
Figure 6, VM-2
Retract/Neutral
Advance
Figure 7, VM-4
Advance
Neutral/Hold
Retract
The other is an adjustable
relief valve. It is located on
the right side of the instrument
panel, and has an adjustment
range of 1000-10,000 psi. Turn
handle clockwise to increase
pressure, and counterclockwise
to decrease pressure. Turn
wing nut on adjustment screw
down to help maintain set
pressure. Use the gauge on
the instrument panel to monitor
the pressure setting as shown
in Fig. 9.
NOTE: The adjustable relief valve
should never be bottomed
out. When bottomed out, premature wear of the
adjustable relief valve will result. For a more accurate
setting, lower pressure below the final setting and
then increase slowly to the final setting. Do not set
the adjustable relief valve above 10,000 psi.
7. Gauge Shut-off Valve — Located in the center of
the instrument panel is the gauge shut-off valve,
as shown in Fig. 9, “B.” It can used to dampen
pulsations or to disable gauge when system pressure
has been established, which will extend the life of the
gauge.
Figure 9
A
B
7.0 MAINTENANCE
1. Maintaining proper oil level. Check the oil level of the
pump prior to start-up, and add Enerpac hydraulic
oil, if necessary, by removing the oil fill cap. (Refer
to 5.0 Installation, step. 5)
2. Change oil every 250 hours, or more frequently if
used in dirty environments. The plug on the lower
front side of the reservoir serves as a drain port.
3. Check all system components for leaks. Repair or
replace leaking components.
Figure 8, IC-43
Pendant (PER
models only)
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