ELECTRICAL EQUIPMENT—Q.9
1.
Remove the old bearing bush from the end
bracket. The bearing can be withdrawn with a
suitable extractor or by screwing a j inch 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 self-extracting
tool of the type and in the manner shown in Fig.
Q.6-the fitting pin or mandrel portion being of
0.5924 in (15,05 mm) diameter and highly
polished. To withdraw the pin after pressing the
bush fully home, turn the nut against the sleeve
while gripping the squared end of the fitting pin.
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 completely immersed in a
good grade
Fig. Q.6.
Tool for fitting Commutator End Bracket Bush.
Fig. Q.7.
Drive End Bracket with Circlip Retained Bearing.
S.A.E. 30 engine oil: this will allow the pores of
the bush to be filled with lubricant. The
enclosed ball bearing at the driving end is
replaced as follows:—
1.
Drill out the rivets, or remove the screws
whichever is applicable, which secure the
bearing retaining plate to the end bracket and
remove the plate.
2.
Press the bearing out of the end bracket.
3.
Remove and clean the corrugated washer and
felt ring.
4.
Before fitting the replacement bearing. see that
it is clean and pack it with high melting point
grease.
5.
Place the felt ring and corrugated washer in the
bearing housing in the end bracket.
6.
Locate the bearing in the housing and press it
home.
7.
Fit the bearing retaining plate. Insert the new
rivets from the pulley side of the end bracket
and open the rivets by means of a punch to
secure the plate rigidly in position. If secured
by screws, fit the screws and tighten.
Ball Race Bearing in Drive End Bracket
(Circlip Secured Assembly)
This arrangement is shown in Fig. Q.7.
1.
Insert the tip of a screwdriver in the extractor
notch and prise free the circlip.
2.
Remove the bearing retaining plate and press
out the bearing.
