Hi-Force HAP21042 Series Manuel d'instruction - Page 5
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INSTRUCTION MANUAL – AIR DRIVEN HYDRAULIC PUMPS:
Model Series: AHP1120, AHP1120R, AHP1121, AHP1121R, AHP1122, AHP1122R, AHP1141, AHP1142,
HAP21011, HAP21012, HAP21014, HAP21016, HAP21021, HAP21022, HAP21024, HAP21026, HAP21031,
HAP21032, HAP21034, HAP21036, HAP21041, HAP21042, HAP21044, HAP21046,
7.2 - Cleaning the air filter
There is an air filter inside the air inlet
connection (Fig 12).
Use a slotted tip screwdriver of the
appropriate size to unscrew the filter
from the air inlet connection until it is
extracted.
Clean the filter with compressed air
and then refit and screw it into position.
Do
not
over-tighten
damage may ensue.
Reconnect the air-line quick coupler
after binding the thread with Teflon
tape.
If
the
air
contaminated or damaged, it must be
renewed.
Order
a
new
manufacturer, referring to the list of
spare parts at the end of this manual.
7.3.1 - Checking the hydraulic oil on the 2,5
Litre pump (AHP1120/AHP1120R)
Periodically check that the pump contains the
correct quantity of hydraulic oil by checking
the level on the sight glass (Fig 13). If the oil
level, with cylinder retracted, is below minimum
(E, Fig 13a), refill using the recommended types
of oil.
7.3.2 - Checking the hydraulic oil on the 5/10
Litre pump (AHP1121(R)/ 1122(R)/ 1141/ 1142)
Periodically check the oil level, which must be
between the two notches on the oil cap
dipstick (F in Fig 13b).
7.4 - Hydraulic oil change
Change the oil at intervals of 250 duty hours.
This operation must be performed when the
cylinder is fully retracted: USE ONLY HI-FORCE
HFO46 OIL for your AHP Pump.
If the pump is mounted vertically,
disassemble
it
horizontally.
Use a slotted tip screwdriver to remove
the filler plug (Fig 1).
Empty the pump of oil by turning it
upside down over a suitable container.
Allow all the oil to flow into the
container and then fill the pump with
the quantity and type of new oil
specified above.
Clean the filler opening with a clean
cloth and refit the plug, pressing it fully
down or, if necessary, to the partially
inserted breather position.
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
the
filter
or
filter
is
excessively
filter
from
the
and
position
it
7.5 - Troubleshooting
The chart below describes the possible issues
that could occur during operation of the
pump, together with an indication of the
appropriate corrective action. If the prescribed
action fails to solve the problem, contact the
manufacturer.
PROBLEM
POSSIBLE CAUSE
Pump cannot be
Compressed air line closed or
started
clogged
Insufficient air pressure
Pump stops working
under load
Air filter dirty or clogged
Oil leak in the main hydraulic
circuit.
Pump operates but
Pump internal leak
no pressurizes oil is
delivered
Low oil level
Insufficient air pressure
Internal relief valve incorrectly
Pump fails to reach
maximum pressure
set.
Oil leak in the main hydraulic
circuit
Excess load
Pump delivers
pressurized oil but
Oil circulation fault
load is not lifting
Oil leak in the main hydraulic
Piston retracts
circuit
although treadle is
not pressed on
RELEASE side
Pump internal fault
Oil pressure line obstructed or
coupling incorrectly connected
If piston is designed to return
under gravity, ensure load is
Piston fails to perform
sufficient
retract stroke (single
acting cylinder)
Cylinder spring broken
Cylinder release valve not
working
Oil pressure line obstructed or
Piston fails to perform
coupling incorrectly connected
retract stroke (single
Cylinder release valve not
acting cylinder)
working
Insufficient air pressure.
Pump
flow
rate
Air filter dirty or clogged.
insufficient
Reservoir breather plug or
screw not opened
CORRECTIVE ACTION
Check compressed air supply to
pump
Check compressed air supply to
pump is between 2.8 and 10Bar
Clean or Renew
Check the circuit for leaks and
repair as necessary.
Check for leaks and return
pump to manufacturer for
repair
Check level and top up as
necessary
Check compressed air supply to
pump is between 2.8 and 10Bar
Contact the manufacturer
Check for oil leaks and ask the
manufacturer
Reduce
Check if pipelines are
obstructed or if cylinder is
working correctly
Check the circuit for leaks and
repair as necessary.
Check for leaks and ask the
manufacturer
Check oil pressure line.
Increase load on cylinder
Repair
Repair cylinder
Check oil pressure line.
Repair cylinder
Check compressed air supply to
pump is between 2.8 and 10Bar.
Clean or Renew.
Open breather Plug or screw as
described in section 5