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4.2.2 Fitting the bearings
1. Fit bearing covers (pos. 155a and 155d) on the shaft
(pos. 172).
2. Heat up the bearings (pos. 153 and 154) to 90 °C,
and fit them on the shaft (pos. 172).
An induction heater is the most suitable heating
method for greased-for-life bearings (2Z and 2RZ).
Note:
Remember to demagnetise the components,
if necessary.
Alternatively, heat up the components using a
heating plate or an oil bath.
If it is not possible to heat up the bearings before
fitting them, press or tap them into position by
applying the force to the inner ring of the bearing.
3. Replace V-ring (pos. 159b) in the bearing seat of the
bearing end shield in the drive end (pos. 156b).
4. Fit the bearing end shield in the drive end on the
bearing. If necessary, heat up the bearing end
shield to approx. 80 °C to ensure that the bearing
seat is large enough for an easy and safe fitting of
the bearing.
5. Fit the three screws (pos. 182) holding the bearing
cover (pos. 155a), and
tighten them to 8 Nm
.
6. Carefully move the bearing end shield in the drive
end and the shaft/rotor to their position inside the
stator housing. Take care not to damage the stator
windings.
7. Fasten the bearing end shield in the drive end with
the screws (pos. 185), and
cross-tighten them to
27 Nm
.
8. Replace V-ring (pos. 159e) and O-ring (pos. 157) in
the bearing seat of the bearing end shield in the
non-drive end (pos. 156a).
9. Fit spring (pos. 158) in the bearing seat of the
bearing end shield in the non-drive end.
10. Fit the three screws (pos. 182a) holding the bearing
cover (pos. 155d), and
tighten them to 8 Nm
.
11. Fasten the bearing end shield in the non-drive end
with the screws (pos. 185a), and
cross-tighten
them to 27 Nm
.
12. Fit fan (pos. 156) and retaining ring (pos. 156c).
13. Fit fan cover (pos. 151), and fasten it with the
screws (pos. 152) and the rubber bushes.
Tighten the screws to 10 Nm
.
14. If the bearings are not prelubricated, lubricate the
bearings according to instructions. See section
7.2 Lubricating intervals and grease
.
15. Confirm the replacement of the bearings in the
INSTALLATION
menu of the R100 (or via PC Tool
E-products). See fig.
21
.
Fig. 21
Confirmation of bearing lubrication
T
M
04
24
43
25
08
Fig. 22
Detail from fig.
29
, exploded view of the MGE-F
