Hydraulic Technology Worldwide
AIR DRIVEN HYDRAULIC PUMPS
YPA3174D 1500bar
INSTRUCTION MANUAL
5
1.0 SAFETY FIRST !!!
Read all instructions, warnings and cautions
carefully. Follow all safety precautions to avoid
personal injury or property damage during
system operation. Enerpac cannot be
responsible for damage or injury resulting from
unsafe product use, lack of maintenance or
incorrect product and/or system operation.
Contact Enerpac when in doubt as to the safety
precautions and operations.
IMPORTANT: Before using the product
it’s important for the operator to read the
instructions and to understand the precautions,
the warnings, and to apply the local codes of
security.
2.0
DESCRIPTION OF THE PRODUCT :
The “ENERPAC” air driven hydraulic pumps
model YPA3174D , are manual pumps realised for
single acting tensioners, the components are
described in fig. 1 and 2, while the characteristics of
the pump M189D are indicated in the graph page 7.
In fig.2 we find the air input for alimentation of the
pump (pos.25), made of a fitting with ½ BSP thread
to be equipped with an air fitting, not include,
compatible with the equipment where the pump will
be used. The oil output(pos. 11) is a female rapid
coupler
.
3.0 INSTALLATION
3.1 GENERAL: The Enerpac pumps are supplied
ready to use, complete with hydraulic oil. The
safety valve is preset as the relief valves.
These values can be changed only by qualified
personal.
3.2 PRELIMINARY OPERATIONS:
1
Position the pump near the work area, assure
that the hoses and the pendant can reach easily
the wrench.
2
Check that the alimentation of the
compressed air is able to give a
minimum of 300 Nl/min at 6.5 bar
3
Check the pressure setting as described at point
3.3
4 Check that the couplers are well connected..
ATTENTION: Always mount the protection
caps on the couplers when not used. Do not
pressurise flexible hoses without connecting the
couplers.
3.3 REGULATION PRESSURE:
Verify what is the working pressure needed for
the tensioning
Connect the alimentation hose to the fitting for
air alimentation pos. 25
Connect the flexible oil hose at the output of the
pump (pos. 11) leaving the other hose end with
the coupler free(the hose must be able to be
pressurized)
ATTENTION: avoid that the hose free end,
during the pressure regulation is pointing towards
persons or animals; an eventual break of the coupler
could eject metal parts which could be harmful.
Lift and turn counterclockwise the air tap on the air
regulator(pos.3) until it is completely open
Shut the the relief valve(pos. 15) turning clockwise.
Open the air valve(pos. 42).
Turn clockwise the air tap (pos.3) slowly until you
reach the working pressure of the oil(see the
performance graph pag.7) shown on the gauge of
the front panel(pos. 6), while trough the air valve it
is possible to the air pressure
When the working pressure is reached close the air
valve(pos. 42)
Lock the air tap, lowering it(pos.3) and open the
relief valve(pos. 15) turning counterclockwise to set
the pressure of the circuit to zero
