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UTD.123.2019-10.00_EN
8 - Lubrication
8.1 - General
Gear reducers and gearmotors must be lubricated with polyglycol or polyalphaolephines based synthetic
oil depending on the series; they are supplied FILLED WITH OIL OR WITHOUT OIL according to type and
size (see ch. 8.2). The gear pairs are oil-bath lubricated, the bearings are either oil bathed or splashed
or lubricated «for life» with grease. For some mounting positions with continuous duty at high speed, an
expansion tank is foreseen: consult us.
When supplying WITHOUT OIL, the filling up to specified level is
Buyer's responsibility and has to be carried out with gear reducer at rest
; usually the level is stated by
means of transparent level plug (see ch. 15 ... 20 or eventual SPT scheme attached to present instructions).
Every gear reducer is equipped with lubrication name plate.
Concerning lubricant type, how supplied status of gear reducers, plugs, filling instructions, oil-change
interval, etc. see table 8.2.
Make sure that for gear reducers and gearmotors size
>
100, the filler plug is metallic and equipped
with filter and valve
(symbol
; see fig. 8.1.1). When these gear reducers are required filled with oil (non-
standard design) the
filler plug
is not mounted but
supplied separately
; the responsible for installation will
take care of the right assembly (see ch. 15 ... 20 or eventual scheme SPT attached) replacing a closed plug.
When the gear reducer or gearmotor is supplied with
transparent level plug
(size
>
100), the lubricant
quantity to be filled is the one that allows
to reach the level
specified
by the proper transparent plug at
gear reducer rest
and not the one stated on the catalog.
When gear reducer or gearmotor is provided with a
level plug with rod
(see fig. 8.1.2), fill with oil up to
specified level on rod.
When gear reducer or gearmotor is provided with
a plug for flowing over level
(red colour, see fig. 8.1.3)
fill after unscrewing a.m. plug in order to check the obtained level by oil outlet.
Fig. 8.1.1
Filler plug with filter and valve
Fig. 8.1.2
Level plug with dip stick
Fig. 8.1.3
Plug for flowing over level
2I, 3I, 4I (100, 125),
m.p.
V6
3I (125)
, m.p.
V5
1)
ICI (100, 200),
m.p.
B6
1)
C3I (100, 125),
m.p.
B6
1)
1) For high speed continuous duty an expansion tank is envisaged: consult us.
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Usually bearings are automatically and continuously lubricated (bathed, splashed, through pipes or by a
pump) utilising the main gear reducer lubricant. The same applies for backstop devices, when fitted to gear
reducers.
In certain gear reducers in vertical mounting positions V1, V3, V5, V6, and bevel helical gear reducers in
horizontal positions B3, B6, B51, B52 (though not gearmotors in this case, for which the above indications
hold good) upper bearings are independently lubricated with a special grease «for life», assuming pollution-
free surroundings. The same applies for motor bearings (except some cases in which relubrication device is
adopted) and backstop devices when fitted to motors.
Always be sure that the gear reducer is located as per the mounting position ordered - including the
inclined mounting positions (e.g. B3 38° V5), which appears on the name plate (see ch.
4.4). In case
of
pivoted mounting positions
the gear reducers are equipped with an supplementary nameplate stating
the mounting position, the oil filling and level check during maintenance operations.
For gear reducers of EP series, when
n
2
output speed is lower than 0,3 min
-1
, for all mounting positions refer to approx
oil quantities stated for position V1.
For mounting positions, oil quantity and plug position see ch. 19, 20
.
The filler plug and breather is supplied disassembled, close to
its seat. Before commissioning, after positioning the gear
reducer in the mounting position stated in the nameplate,
replace the closed plug with the filler plug and breather (see fig.
beside).
