English (GB)
21
5.2.2 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
.
15. Confirm the replacement of the bearings using Grundfos GO
Remote (or via PC Tool E-products).
Fig. 17
Detail from fig.
, exploded view of the MGE-F
TM0
4
244
3 2
5
0
8
Summary of Contents for MGE F
Page 1: ...MGE model F Service instructions GRUNDFOS INSTRUCTIONS ...
Page 30: ...30 ...
