Enerpac MP-Series - Manual (Page 3)

3
IMPORTANT: Salt water must not be
used as a medium with this pump.
All pumps are tested on water before leaving the
factory, pumps are then drained prior to despatch
but some water residue will remain. If this causes
any system contamination, thoroughly flush the unit
before final installation.
Some fluids will damage the Nitrile (Buna N) and
PTFE seals installed in the standard Multifluid Pump.
ENERPAC can supply EPDM seal kits, see chart
above.
If you are unsure of the compatibility of your fluid
with the pump or seals, consult either your local
ENERPAC authorised distributor or ENERPAC’s
product support department.
5.0 INSTALLATION
Connecting the Pump
The pump outlet connection is 3/8" NPT, use Teflon
tape or a suitable thread sealant to ensure a leak free
joint. Do NOT overtighten the fitting as this will
cause permanent damage to the aluminium pump
body. See page 4 for pump dimensions.
If the pump is to have an external reservoir, connect
the supply to the 3/8" NPT port on the underside of
the pump body. The joint must be sealed.
WARNING: Ensure all hoses, pipes and
fittings are suitable for the fluid used in
the system. Avoid the use of copper or
brass components when using water.
These materials may cause the aluminium pump
body to corrode internally.
IMPORTANT: The maximum allowable
length of the vertical suction tube is
600mm. Reservoir MUST be vented.
6.0 PRIMING
After installation, the pump must be primed to
remove any internal air. To achieve this, fully open
the pump release valve and fully stroke the pump
handle 10 times; close the release valve and
pressurise the system. If all the air has been
expelled, the pump handle will not feel spongy and
only have a small amount of free travel when
operated, especially in the pump’s second stage. If
air is still apparent, repeat the above procedure. The
pump will not lose its prime unless it is removed from
the system or the operating fluid diminishes.
Air may also become trapped in the system. This
may be removed by loosening a fitting at the highest
point and slowly operating the pump handle until
fluid leaks from the fitting. Re-tighten the fitting
before fully pressurising.
WARNING: Always wear safety glasses.
The operator must take precaution
against injury due to failure of the tool or
workpiece.
A small amount of free movement of the handle is
associated with clearance of the working parts and
should not be confused with loss of effective stroke
due to trapped air.
WARNING: Always add operating fluid
when the system is at its rest position,
i.e. cylinders fully retracted, or the
system will contain more fluid than the
reservoir can hold.
7.0 OPERATION
1. The pump relief valve setting may vary with
different fluids because of their viscosity. When
first operating the unit check the maximum
operating pressure is correct for the fluid being
used. If necessary, adjust the pressure relief valve
in accordance with section 8.
2. Install the pumping handle to the operators
preferred position. The tumbler shaft has two
holes and flat. This allows the pumping handle to
have 4 mounting positions throughout 360
degrees.
3. Close the release valve hand tight only. Excessive
force will cause unnecessary seat wear and
eventual pump failure.
4. Operate the pump handle at a steady speed (if the
handle is operated fast the pump will be less
efficient because the piston cavities will not fully
charge). The pump will smoothly and
automatically change from 1st stage to 2nd stage
when the unloader setting is reached.
5. To release the system pressure, turn the release
valve knob anti-clockwise. The release valve has
been designed for fine control of pressure release.
8.0 PRESSURE RELIEF VALVE ADJUSTMENT
WARNING: The pressure relief valve is
not designed to protect the system
against back loading.