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UTD.123.2019-10.00_EN

Seal rings duration depends on several factors such as dragging speed, temperature, ambient conditions,

etc.; as a rough guide it can vary from 1 600 to 12 500 h; in any case replace them every 5 years.
In general, however, replace the seal rings in case of dismounting or of periodical check; in this case, during

the assembly, you have to:
– lubricate the rotary seating of seal ring and the seal lip generously with grease (type KLÜBER Petamo

GHY 133N);

– procede with mounting paying particular attention not to damage the seal lip due to accidental shocks or

hurts or direct radiation deriving from eventual hot fitting of other components;

– position the seal lip

not in correspondence

of previous ring groove;

– position the seal ring in its seat on gear reducer housing

using locking adhesive

(type LOXEAL Istant

29); the application of locking adhesive is required even when replacing

protection caps

The new seal rings must be made of fluoro-rubber (Viton®).

In case of designs with

labyrinth seal and greaser

(«Taconite»), re-grease at least every month.

In case of EP series, for sizes higher than 030A ( excluding sizes 031A and 043A), refill the grease on

output seals each 3000 operating hours or at least every 6 months.

13.5 - Bearings

Since there are many different types of bearings in a gear reducer (roller, tapered roller, straight roller,

etc.) and each bearing works with different loads and speeds depending on the input speed, the nature

of the load of the driven machine, the transmission ratio, etc., and with different lubricants (oil bath, oil

splash, grease, oil circulation, etc.), it is not possible to define any periodical maintenance and replacement

of bearings in advance.
It is therefore necessary

to undertake periodical checks (according to table 14.3) to verify noise level

and vibrations with the help of appropriate diagnostic equipment and instruments

. If the measured

values worsen even slightly it is necessary to stop gear reducer or gearmotor and after having inspected

inside and consult Rossi, if need be.

If the failure of a bearing and the stopping of the machinery constitute a danger to people, execute a

continuous monitoring of vibrations and noise level.

11.6 - Metal filler plug with filter and valve

For the cleaning of plug (see ch. 8.1) it is necessary to unscrew it from the gear reducer

(preventing any debris or other foreign items from entering the reducer), disassemble the

cover, wash it with solvent, dry with compressed air and reassemble it.
Do this operation at least once every 6 months: if the environment requires it, reduce the

maintenance interval.

13.7 - Livelli sonori

Most of the Rossi product range is characterised by

sound pressare levels L

pA (mean value of measurement,

assuming nominal load and input speed n1 = 1 400 min -1, at 1 m from external profile of gear reducer

standing in free field on a reflecting surface, according to draft proposal ISO/CD 8579)

lower or equal to

85 dB(A)

The table 11.8.1 shows the products which can exceed a.m. threshold. For further information about sound

levels of every single product see Rossi technical catalogs.

Tab. 13.7.1 - Products that can exceed the threshold of 85 dB(A) of sound pressure levels.