Check Oil Level; Change Oil And Clean Reservoir - Enerpac ZE3-6 Carnet D'instructions

levels, similar to a pressure switch pump. These levels are set in
two menus (HI PRESS and LO PRESS) that become available
when AUTOMODE is ON. The main operating menu text will
change from "OK" to "AUTO" to notify the operator that the pump
will take control when certain limits are met. The specific
operation of the motor / electric valve is factory set by pump
model. See the "Pump-Model-Matrix", Page 15, Table 3 for details
by pump model number.
B. "HI PRESS" Menu
Screen 21
SET
HI PRESS
10500
(See Screen 21.) This screen allows the operator to set the high-pressure
limit for the pump to de-energize the motor / electric valve. Maximum
value is 10,500 psi.
Caution: Due to motor coast down, valve shift time, and
system oil capacitance, always set the user adjustable
relief valve 200 psi above the "HI PRESS" value to
prevent pressure spikes.
C. "LO PRESS" Menu
Screen 22
SET
LO PRESS
OFF
(See Screen 22.) This screen allows the operator to set the low-pressure
limit for the pump to re-energize the motor / electric valve. Maximum
value is 50 psi less than the current HI PRESS value. When LO PRESS
is set to a value higher than OFF, the pump will operate like a pressure
switch pump, de-energizing the motor / electric valve at the HI PRESS
value and re-energizing the motor / electric valve at the LO PRESS value.
For an additional notice to the operator, when pump is latched into this
"pressure switch" mode, the operating menu text will change to "AUTO
ON" and the LCD back light will flash.
Caution: Setting the LO PRESS value too close to the
HI PRESS value may cause the pump to cycle on and
off too often. Frequent starting and stopping of the
motor will increase wear and reduce the life of the pump. Use
appropriate valving in the hydraulic circuit to ensure that the
pump does not cycle on and off more than 3 times per minute.
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D. "Calibration " Menu
Screen 23
SET
CAL PT A
(See Screen 23.) This screen allows the operator to adjust the pressure
value shown on the LCD to match a master gauge. To access this
menu, go to "UNITS" menu.
Then press and hold the ON/OFF button in for 7 seconds, ENTRY
CODE will appear. Then press and hold both Down-Arrow and Up-
Arrow buttons for 7 seconds. See Table 2 "Z-Class Pump Calibration"
for adjustment steps.
7.0 MAINTENANCE
Frequently inspect all system components for leaks or damage.
Repair or replace damaged components. Electrical components,
for example, the power-cord, may only be repaired or replaced by
a qualified electrician, adhering to all applicable local and national
codes.

7.1 Check Oil Level

Check the oil level of the pump prior to start-up, and add oil, if
necessary, by removing the fill port cap. Always be sure cylinders
are fully retracted before adding fluid to the reservoir. See Figure 2.

7.2 Change Oil and Clean Reservoir

Enerpac HF oil is a crisp blue color. Frequently check oil condition
for contamination by comparing pump oil to new Enerpac oil. As
a general rule, completely drain and clean the reservoir every 250
hours, or more frequently if used in dirty environments.
NOTE: This procedure requires that you remove the pump from
the reservoir. Work on a clean bench and dispose of used oil
according to local codes.
1. Unscrew the 13 bolts holding the coverplate to the reservoir
and lift the pump unit out of the reservoir. Be careful not to
damage the filter screen.
2. Pour all oil out of the reservoir.
3. Thoroughly clean the reservoir and reservoir magnet with a
suitable cleaning agent.
4. Remove the pick-up filter screen for cleaning. (Do not pull on
the screen or the bottom of the intake to avoid possible
damage.) Clean the screen with solvent and a soft brush.
Reinstall.
5. Reassemble the pump and reservoir, installing a new
reservoir gasket.
6. Fill the reservoir with clean Enerpac hydraulic oil. The
reservoir is full when oil level is in middle of the sight gauge
(see figure 4).
7.3 Changing the Filter Element (optional)
A return line filter may be ordered as an accessory to the pump. The
filter element should be replaced every 250 hours, or more
frequently in dirty environments. The filter manifold is equipped with
a 25 psi (1,7 bar) bypass to prevent over pressure rupture if filter
plugging occurs. Filter element replacement part number is PF25.
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