19
ROSSI
GEARMOTORS
UT.D 045 rev. 5
Motor: see specific instructions.
NOTE
When consulting ROSSI MOTORIDUTTORI state:
– all data of gear reducer or gearmotor name plate;
– nature and duration of failure;
– when and under which conditions the failure occured;
– during the warranty period, in order not to loose validity, do not disassemble nor tamper the gear reducer or gearmotor without approval
by ROSSI MOTORIDUTTORI.
Trouble
Possible causes
Corrective actions
Gear reducer troubles: causes and corrective actions
Excessive oil temperature
Damaged raceway surface (scoring, rust, dent, etc.)
Position the gear re ducer correctly
Clean/replace filler plug with vent valve
Low speed shaft not rotating
even with high speed shaft/
motor running
Consult ROSSI MOTORIDUTTORI
Consult ROSSI MOTORIDUTTORI
Vibrations
Check the fastening and the bearings
Lubricant leaking
from seal rings
Seal ring with worn, bakelized, damaged or false
mounted seal lip
Replace seal ring (see ch. 8.3)
Restore the raceway
Mounting position differs from the one stated on the
name pla te
Inadequate lubrication:
– excessive or insufficient oil quantity;
– unsuitable lubricant (diffe rent type, too viscous,
ex hausted, etc.)
wrong mounting position
Too tightened taper roller bearings
Worm gear reducer with excessive load during
running-in
Excessive ambient tempe rature
Check:
– oil level (gear reducer at rest) or quantity
– lubricant type and/or state (see ch. 6.2 lubrication
table); replace if necessary
Change mounting position
Consult ROSSI MOTORIDUTTORI
Reduce the load
Increase the cooling or correct the ambient temperature
Inefficiency of auxilia ry bearing lubrication
system
Check the pump and the pipes
Inefficient or out of service oil cooling system: obstruc-
ted filter, insufficient oil (exchanger) or water (coil) flow
rate, pump out of service, water temperature
20
°C, etc.
Oil leaking from filler plug
Too much oil
Check oil level/quantity
Incorrect mounting position
Check mounting position
Check pump, pipes, oil filter and safety devices effi-
ciency (pressure switchs, thermostats, flow indica-
tors, etc.)
Anomalous noise
Inefficient vent valve
One or more teeth with:
– dents or spallings
– excessive flanks roughness
Consult ROSSI MOTORIDUTTORI
Worn, faulty or badly lubricated bearings
Broken key
Completely worn gear pair
Consult ROSSI MOTORIDUTTORI
Lubricant leaking from
joints (covers or
half-casing joints)
Defective oil seals
Consult ROSSI MOTORIDUTTORI
Taper roller bearings with ex cessive clearance
Worn, faulty or badly lubricated bearings
Consult ROSSI MOTORIDUTTORI
Obstructed passage of air
Eliminate obstructive material
Slow or missing air recycle
Arrange auxiliary ventilation
Radiance
Screen gear reducer and motor properly
Consult ROSSI MOTORIDUTTORI
Water in the oil
Defective cooling coil or heat exchanger
Responsabilità relative ai prodotti e al loro uso
Il Cliente è responsabile della corretta scelta e dell’uso del prodotto in
relazione alle proprie esigenze industriali e/o commerciali, salvo il caso
in cui l’utilizzo sia stato raccomandato da personale tecnico autorizzato,
debitamente informato dal Cliente delle proprie necessità operative.
In questo caso, tutti i dati necessari per la selezione dovranno essere
comunicati fedelmente e per iscritto dal Cliente, riportati nell’ordine e
ufficialmente confermati.
Il Cliente è sempre responsabile della sicurezza nell’ambito delle appli-
cazioni del prodotto.
Nella stesura del catalogo è stata dedicata la massima attenzione al
fine di assicurare accuratezza delle informazioni. Tuttavia non si accet-
tano responsabilità dirette o indirette per eventuali errori, omissioni o
dati non aggiornati.
A causa della costante evoluzione dello stato dell’arte, potranno esse-
re apportate modifiche al contenuto della presente pubblicazione, in
qualsiasi momento.
Il responsabile ultimo della selezione del prodotto è il Cliente, salvo
accordi diversi debitamente formalizzati per iscritto e sottoscritti dalle
Parti.
Product liability, application considerations
The Customer is responsible for the correct selection and application
of product in view of its industrial and/or commercial needs, unless
the use has been recommended by technically qualified and authori-
zed personnel, who were duly informed about customer’s application
purposes.
In this case all the necessary data required for the selection shall be
communicated exactly and in writing by the Customer, stated in the
order and officially confirmed.
The Customer is always responsible for the safety of product appli-
cations.
Every care has been taken in the drawing up of the catalog to ensure
the accuracy of the information contained in this publication, however
no responsibility may be accepted for any errors, omissions or outda-
ted data.
Due to the constant evolution of the state of the art, this publication
will be subject to modifications.
The responsibility for the product selection is of the Customer, exclu-
ding different agreements duly legalized in writing and undersigned
by the Parties.
