INSTALLATION & MAINTENACE MANUAL
RCOe2100/03.06
39
Motor case fill in control for motor usage in potential explosive hazardous
atmosphere (Directive “ATEX” 94/9/CE).
It is compulsory to design the system so that not to allow the motor operation if the
case is not full of oil; lack of oil in the motor case may be either due to incorrect
installation (i.e.: motor case not filled in with oil) or motor failure (i.e. shaft seal
failure). For this reason the motors built in conformity to the “Directive ATEX 94/9/CE”
are equipped with case oil presence sensor (sensor also built in conformity to the
directive)
5.3 – Start Up
During and immediately after the motor start up, any hydraulic system must be closely and frequently
checked.
The motor does not require any special breaking-in, but all residual impurities in the system must be
eliminated by running the motor at low speed and with no load applied, granting the minimum necessary
inlet pressure
After a brief period in service, the system filters should be cleaned. This operation will also lead to the purge
of air from the motor cylinders; air inside the motor cylinders is the reason of the possible noise at the start
up of the motor. In case of the motor types MRD/MRDE/MRDA – MRV/MRVE/MRVA it is recommended to
change displacement several times in order to purge air from the displacement piloting system cylinders.
In case after this initial breaking-in phase the system filters are very dirty, it is recommended to repeat the
operation; however this fact does not imply that the prescribed system cleaning procedures have not been
followed.
It is better to follow the above instructions each time the motor or any other part of
the system is dismantled.
When running idle (no load applied), make sure the motor pressure, temperature and noise level are
sufficiently low. High pressure, temperature or noise level in idle operation might be symptoms of
unforeseen operating conditions.
3
Pls. see the “Flushing” section
