Recommended Lubricants; Bearing Replacement - S&P CXRT Serie Instrucciones De Montaje Y Mantenimiento

CXRT, GT
Replacing the grease
After the bearing has been re-lubricated a number of
times, or the grease has become caked, darkened or
faded (compare with its original color), the grease should
be changed as follows:
1. Clean the outside of the bearing housing. Open the
bearing cover.
2. Remove all the old grease. Wash the bearing with
white spirit or paraffin oil. Petrol may also be used, but
bear in mind its flammability. Check the bearing
after cleaning. If even the slightest flaw is discovered,
the bearing must be replaced. The bearing should
be oiled after cleaning. Bearings rust easily if they are
not installed immediately.
3. Spread new grease on the rolling surface by hand or
by using a plastic smoothing tool. Fill the empty space
in the bottom half of the bearing housing half way
with new grease. Do not overfill, as it can cause
overheating of the bearing.
4. Refit the upper half of the bearing housing.
5. Perform test run. Check the bearing using a screw
driver as a simple stethoscope, placing its tip against
the bearing housing and the handle against the ear.
The bearing is running properly if you can hear a
muted humming sound. A whistling sound indicates
inadequate lubrication.

4.7.4 Recommended lubricants

Only high quality bearing greases should be used.
The following greases, amongst others, are suitable:
Standard operating conditions: (-30...+110°C)
– SKF Alfalub LGMT 2
– Mobilux 2
– Shell Alvania R2
– Esso Beacon 2
Warning! Use protective gloves when handling
lubricants and cleaning solutions. Regular exposure
to paraffin oils, solvents, etc. can cause allergic
reactions.

4.8 Bearing replacement

Important! Before replacing bearings, mark the bearing
location on the shaft so that the clearance between the
fan impeller and fan casing will not be changed. When
you have replaced the bearing ensure by rotating the
impeller, that it has been centred correctly (see Figs. 4.8
and 4.9 and Table 4.5) and that it rotates freely.
Table 4.4 The amount of grease needed for
re-lubrication (g).
Fan
056 063
Impeller HB HB
(g) 10 11
12
Fan size
071 080 090
HB LB HB LB HB
13 6 18 8 20
Fig. 4.8 Assembly of the LB and HB impeller and
the inlet cone. Measurements S and T should be as
equal as possible the whole way.
Fig. 4.9 Assembly of LF impeller and the inlet cone.
The distance between the impeller and the side plate
inlet opening T should be as equal as possible for
its entire length.
100
LB HB
14 23
Service and repair
T
R