8
COMMISSIONING
Pneumatic connection
The air-hydraulic pump is designed for an air pressure of 2.8 - 8.0 bar; higher pressure should not be
used; if pressure is lower, the pump will not start working. The air admission port is equipped with a
connection thread G 1⁄4", in which a corresponding pneumatic unit can be screwed in. The air supply
should have a filter and a pressure controller. An oiler is not necessary.
Hydraulic connection
The air-hydraulic pump is equipped with a hydraulic hose which is sealed by the tapered threads.
You should use suitable sealing material (eg. Teflon strip). At no circumstance the sealing material should
enter into the hydraulic system; this may result in damage and failure of the unit. When connecting
hydraulic hoses, attention has to be paid to cleanliness to avoid dirt entering into the hydraulic system.
Ventilation
There are two ways of ventilating the hydraulic system. If possible, the pump unit should be placed at
the highest point of the system. The system will be automatically ventilated if the cylinders are operated
several times without any load. If pumps and cylinders are fixed and ventilation is not possible that way,
you have to install bleeder valves within the system itself.
Operation
After the pneumatic and hydraulic hoses have been connected, the air-hydraulic pump is ready for use.
To ventilate and deaerate the reservoir, the air bleeder plug (27) in the pump plate has to be opened
for about 3-4 turns. If the pump is mounted in vertical position (oil port downwards), the reservoir’s
ventilation has to be done by pulling out the filler neck (48).
When actuating the pedal on the side marked “PUMP” the air admission valve will be opened and the
cylinder advances. Unless the pedal is actuated again, the cylinder will hold its position. If the pedal is
actuated on the side marked “Release”, the release valve opens and the cylinder retracts.
Cleaning of the air-breather
In the inner of the pneumatic connection (8) you find the air-breather (7). Use a flat screwdriver to loosen
the breather and take it out. Clean the breather with compressed air and put it back. Do not turn the
screw too hard for not damaging the threads. If the breather is very dirty, you have to replace the breather
filter.
Maintenance
After approx. 250 hours operation or in the event of dirt invading the system, the hydraulic oil
should be changed. The used oil should be drained by the filler neck and new oil has to be filled in
also through the neck. The hydraulic oil should be of a viscosity class HLP46. A mixture of different
oil types should be avoided. Concerning the quantity of oil please look in the Technical Data sheet.
