Tesmec FRB616, Installation, Operation And Maintenence Handbook

Page: 32 / 102

TENSIONER
Model: FRB616
Manual: MI-FRB616-020-01-GB Date: 11.03.2015 Author: M. Colleoni Page: 29 of 33
7.5 HYDRAULIC CIRCUIT MAINTENANCE
Suitable filters protect the hydraulic circuit.
The filters have to be replaced after the first 500 working hours and every time that the warning lights
(table 4, pos. 29, 30, 31) light with hot oil.
To replace the filter is necessary to:
a. empty the oil tank by opening the cock (table 1, pos. 5).
DANGER: let the hydraulic oil be completely cooled before removing it and always use the
suitable safety wears (gloves, etc.).
ATTENTION: the discharge of the exhaust oils has to be effectuated in conformity with the
laws in force in the relevant country.
b. remove the cover from the tank.
c. remove the filters mounted inside the tank (table 1, pos. 4, 9).
ATTENTION: the filters sunk in the tank have to be replaced and not washed with detergent
products. The dirty inside the pleats of the filtering element cannot be removed with the
washing.
d. replace the filter cartridges
ATTENTION: the new filter cartridges have to be stocked in dry places, without moisture in
order to avoid the performances decay of the filtering element.
ATTENTION: before screwing the new filter, oil it with hydraulic oil or grease the packing ring
mounted on the coupling section of the filter.
e. verify the conditions of the hydraulic oil drained by the tank.
It has to be limpid, without impurities or suspended material and has not to give off a bad smell.
f. check the tank bottom by removing possible sediments of impurity.
g. after carrying out the controls of points e. and f., fill the tank with hydraulic oil.
ATTENTION: make maximum care when filling to make sure no foreign matter, which could
cause irreparable damages to the circuit’s components, enters along with the oil; if possible
filter the oil with a 10

m filter.
For further maintenance operations of installed hydraulic components (pumps and motors), refer to the
enclosed documentation.
ATTENTION: when using the machine after long stopping periods, replace the hydraulic filter
and verify the hydraulic oil conditions.