BSA D14/4 BANTAM SUPREME D14/4 BANTAM SPORTS, Workshop Manual

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D14/4 LUBRICATION A5
The fresh grease will hold the ball bearings in position
during re-assembly. Check that the grease is as quoted
on page A3.
The correct number of ball bearings for each cup is
twenty-four.
FRONT FORK
(D14 Supreme)
The oil contained in the fork legs not only acts as the
damping medium but also lubricates the bearing
bushes. Because of the former function it is essential
that the amount of oil in each leg is exactly the same.
The need for renewal of the oil may be indicated by
excessive movement of the forks, but it should only be
necessary at the intervals quoted on page A2.
Prise out the cap on top of the fork leg; a small hole
is provided in the cap to facilitate this. With the aid of
a tubular spanner, unscrew the small nut which is now
exposed then remove the large nut which carried the
cap. Disconnect the mudguard stay at the lower end of
the fork leg and unscrew the drain stud, allowing the
oil to drain out into a suitable receptacle. Whilst
standing astride the machine, apply the front brake and
slowly depress the forks a few times to expel any
remaining oil in the system.
Repeat the operation on the other fork leg and
replace the drain studs and new fibre washers.
Pour an eighth-pint of an S.A.E. 20 oil into each
fork leg and replace the top nuts and caps.
FRONT FORK
(Sports and Bushman)
The procedure for draining and refilling the forks
fitted to the D14/4 Sport and Bushman is much the
same as above, except that the filler is a single cap nut
on the top of the fork leg, and a drain screw is
provided at the bottom of the fork leg adjacent to the
wheel spindle.
The capacity also is different being a third pint (175
c.c.) S.A.E. 40 oil to each leg.
WHEEL BEARINGS
The wheel bearings are packed with grease on
assembly and should only require repacking at the
intervals given on page A2.
The bearings should first be removed as detailed in
pages F3 and F4, after which they must be washer
thoroughly in paraffin and, if possible, an air line
should be used to blow out any remaining grit or
paraffin.
After assembling the first bearing, pack from inside
with the correct grade of grease (see page A3). Do not
over-pack the bearings, as not only is this wasteful, but
there is a risk of grease finding its way on to the brake
linings. Avoid handling brake shoes with greasy
hands.
FIG. A3.