PUMP AE

The gear set draws oil from the tank through the built-in fi lter and transfers it to the
valve that regulates the oil pressure to the nozzle line.
All oil which does not go through the nozzle line will be by-passed through the valve
back to the return line, in a two pipe installation or, if it is a one-pipe installation, back
to the suction port in the gear-set. In that case the by-pass plug must be removed
from the return port and the return port sealed by steel plug and washer.

Bleed
Bleeding in two pipe operation is automatic.
In one pipe operation, during the starting period, air is purged through the nozzle
line : the by-pass hole of the nozzle plug allows air to pass to the nozzle line without
opening of the regulator valve.
For the fi rst start up, bleeding can be accelerated by loosening the plug in a pressure
gauge port.

Note
Owing to the presence of the nozzle by-pass hole, the pump has no cut-off function.
Cut-off must be provided by an external solenoid valve (as mentioned in the paragraph
APPLICATIONS).