Sunbeam ALPINE I SERIES: APLINE II SERIES, Workshop Manual

Page: 324 / 413

I st �re-issue
Page 10
To replace the bearing bush in the commutator-end
bracket, proceed as follows:-
1. Remove the old bearing bush from the end
bracket. The bearing can be withdrawn with a
suitable extractor or by screwing a i" tap into
the bush for a few turns and pulling out the
bush with the tap. Screw the tap squarely into
the bush to avoid damaging the bracket.
2. Withdraw and clean the felt ring retainer and
felt ring.
3. Insert the felt ring and felt ring retainer in the
bearing housing, then press the new bearing
bush Into ,the end bracket, using a shouldered,
highly polished mandrel of the same diameter
as the shaft which is to fit in the bearing, until
the visible end of the bearing is flush with the
inner face of the bracket (See. Fig. 8).
-4-896
SHOULDERED
MANDREL
Fig. 8. fitting
commutator end brush
Porous bronze bushes must not be opened
out after fitting, or the porosity of the
bush may be impaired.
Note.-Before fitting the new bearing bush, it
should be allowed to stand for 24 hours com­
pletely immersed in engine oil; this will allow
the pores of the bush to be filled with lubricant.
The ball bearing at the driving end Is renewed
as follows (See Fig. 3):-
1. Drill out the rivets which secure the bearing
retaining plate (12) to the end bracket and
remove the plate.
WSM.124
Section N (Elec. Equip.)
2. Press the bearing (13) out of the end bracket
and remove the corrugated washer (14), and
felt ring (8).
3. Before fitting the replacement bearing, see that
it is clean and pack it with high melting point
grease.
4. Place the felt ring and corrugated washer in the
bearing housing in the end bracket.
5. Locate the bearing in the housing and press
it home.
6. Fit the bearing retaining plate.
7. Insert new rivets from the pulley side of the
end bracket and open the rivets over the
plate by means of a punch to secure the rigidly
in position.
To Reassemble
1. Flt the drive end bracket to the armature shaft
The inner journal of the bearing must be sup­
ported by a tube, approximately 4 .. (10·16 cm.)
long,
t•
(3 mm.) thick and internal diameter
i .. (1·6 cm.). Do not use the drive end
bracket as a support for the bearing
whilst fitting an armature.
2. Fit the yoke to the drive-end bracket.
3. Push the brushes up Into the brush boxes and
secure them in that position by positioning
each brush spring at the side of Its brush (See
Fig. 4, (A).
4. Fit the fibre thrust washer(s) and commutator­
end bracket to the yoke so that the dowel on
the bracket lecates with the groove In the yoke.
Take care not to trap the brush connectors.
5. Insert a thin screwdriver through the ventilator
holes adjacent to the brush boxes and gently
lever up the spring arms until the brushes
correctly locate with the commutator (See
Fig. 4,) (A) and (B).
6. Refit the two through bolts.
7. After reassembly lubricate the commutator­
end bearing (see page 6).
.J