INSTRUCTION MANUAL – Electric Driven Pump Series HEP:
Model Series: HEP1, HEP103, HEP2, HEP3, HEP5
Hi-Force Limited – Prospect Way – Daventry – Northants NN11 8PL – United Kingdom
Tel: +44(0) 1327 301000: Fax: +44(0) 1327 706555: Website: www.hi-force.com
These pumps are suitable for use with
single acting cylinders or tools only. All
cylinders used with these pumps must be
rated at 700 bar maximum operating
pressure. These pumps should never be
used with double acting cylinders. If in
doubt consult Hi-Force Ltd; or your
approved Hi-Force distributor.
Description of parts:
HEP1 pump unit
1. Oil reservoir
2. Electric motor
3. Loop for carrying strap
4. Hydraulic connection.
5. Oil filler plug.
6. Power lead
7. Lead to control pendant.
8. Carbon brush cover.
Operation.
Connect pump to power supply.
Depress the ON button on the
control pendant to start the motor
and advance the cylinder/ tool.
When the button is released the
motor stops and the pump will
maintain pressure to hold the load
in place.
To retract the cylinder depress the
OFF button on the pendant to
return oil to tank. Note: The
cylinder will retract fully even if the
button is released.
If it is required to stop the cylinder
retracting part way through its
travel then it will be necessary to
press the ON button once more to
build up pressure again.
Maintenance.
To ensure reliable operation and long life it
is important to carry out maintenance at
set intervals. You should always follow
these simple rules:
Use only Hi-Force HFO32 oil to keep
the reservoir topped up. Ensure
that connected cylinders are fully
retracted before checking oil level
otherwise reservoir may become
pressurised and damaged.
The Oil should be changed
completely after approximately
300 hours working time. To drain
the oil, remove the filler plug and
tip the oil out. Dispose of used oil in
accordance with environmental
procedures.
The oil reservoir is sealed but when
connecting new hoses and
cylinders air can become trapped
in the reservoir causing intermittent
operation or the pump not to
deliver oil. To remove the air, fully
retract cylinder. Stand pump
vertically with filler plug (5)
uppermost. Remove the filler plug,
and top up with oil. Replace filler
plug and operate pump several
times in a vertical position.
If the pump will still not deliver oil
stand the pump level on its feet
and insert a smooth round ended
rod through the hole in the rear
end of the reservoir and push the
rubber bladder inwards by about
30mm while operating the motor.
Take care not to damage the
rubber bladder.
Carbon brush replacement. The
brushes will wear down in use and
eventually cause the motor to
stop. Replace with genuine brushes
only. Disconnect from power
supply. Remove the two rubber
covers (8) and remove fitting
screws so that brushes can be
