Maintenance
9
9.3
Seal ring
It is always recommended that the seal rings are replaced with new ones when they are removed or during periodic checks of gear
reducer; in this case, the new ring should be generously greased and positioned so that the seal line does not work on the same
point of sliding contact as the previous ring.
Oil seals must be protected against heat radiation, also during the shrink fi tting of parts, if applicable.
Duration depends on several factors such as dragging speed, temperature, ambient conditions, etc.; as a rough guide it can vary
from 3150 to 12000 h.
9.4
Bearings
Since there are many diff erent types of bearings in a gear reducer (roller, tapered roller, straight roller, etc.) and each bearing
works with diff erent loads and speeds depending on the input speed, the nature of the load of the driven machine, the
transmission ratio, etc., and with diff erent lubricants (oil bath, oil splash, grease, oil circulation, etc.), it is not possible to defi ne
any periodical maintenance and replacement of bearings in advance.
If
precautionally maintenance is required, undertake periodical checks to verify noise level and vibration with the help
of appropriate diagnostic equipment
and instruments. If the measured values worsen even slightly it is necessary to stop
gear reducer or gear motor and after having inspected the unit replace the bearings which are subject to breakdown.
9.5
Metal fi ller plug with fi lter and valve
To clean the fi ller plug, unscrew it from the gear reducer to remove any dust and
foreign matter, clean it thoroughly, and refi t it.
9.6
Sound levels L
WA
and L
pA
The standard levels of sound power emission
L
WA
relevant to the gearmotors of this catalog, running at nominal load and speed,
fulfi ll the limits settled by VDI 2159 for gear reducers and EN 60034 for motors.
29
UT.D 208-2021.12-EN
