Periodical Maintenance - BSA B31 Instruction Manual

cover plate and should
be
rhoroughly
washed
with peEol,
dried and
r€placed.
Note.-The
pump ls
ltdepeodeotly
EoEnted atrd
8hould
not
be
disturb€d.
PERIODICAL MAINTENANCE
WEEKLY.
Cleanldg. Obviously regular and
thorough
cleaning
will
keep
your
machine looking smart
aDd
will
help
to
rctain both its
new
appearance
and
yalue. But
it
helpr
also
to
lengthen
its life
and maintain
efficiency
if
the
clcaoing process is
caFied out correctly.
Take sperial
care
to plevent
dust and
grit
flom worki[g
into
such
parts as
hubs,
carburettet,
magdyno,
brakes
and gearbox,
To rub dry
and cak€d
mud from
the frame, tank
and
rnudguÅrds
meaDs
that
the enamel
on
these
parts
will
b€
subjecled
to
an abrasive action which
will quickly destroy
thc
polish.
Soak the mud first,
and then
float
it
ofr
with
copious supplies of clean water supplied either with
a
hose
or
a
spon8c.
If
a
hose is used, take care trot
to
direct th€
ttrcam
of
\a,ater
directly on to
the
hub
b€ariDgs,
magdlmo
or c{tbulcttcr.
Whcn
oll
dirt is
removed
dry
and polish
ofr with
a
clcsn dustcr.
Thc cnginc and
gcarbox
are
best cleaned
with
brush
and paraffin, and dried
ofT when clean
wirh
clean mg.
On
Iron
engines an
occasional coating
of
the cylinde!
head and fins with
cylinder paint
prevents
rust
formation
and also helps heat
radiatior.
Oil Tqnk.
Inspecl the level
of
oil. It
should never
bc
allowod
to fall
below the level marked on
the outside
of
tank.
When topping-up, do not
fill
the
tank
completely;
leave about one-inoh
margin
betw€eD
the
oil
and top
of
tank,
If
this plecautiod
is
not
observed,
it is possible lhat
oil will
s€ep
from thc
Rller
cap.
Id
the
case
of
new
machines,
draia the tank after
the
first
500
and
1,000
miles
as
explailed
on
page
18,
Tlres.
Examine
carefully for
cuts and remove any ffints
or
metallic
scraps
which may
have become embedded in
the cover.
Check the
pressurcs with
a gauge, and innatc
to corrcct
prcssure if
necessary. (Sce pages 3
and
4.)
t6
l7
Ste€ring H€ad. Give two
or
thrce sffokes
of
the
Sre3se
gun.
Brake Pedå|. Give two or
three
drops of
oil
occå6ionally.
Reår
SuspensioD.
(Plunger Type).
A
few
strokes
of
the
gease
gun.
Control Joitrt$ and Exposed Cables.
A
few drops
of
oil.
Sadde
No6e
Bolt
One
or two strokes of the grease guD.
Blttery.
Top-up
as
oftetr
as necessary
to maiDtain lcvel
of
elecholyte
one-qua.rter
inch
above
top
of
plates.
ALWAYS
USB
DISTILLBD
WATER
WHEN
TOP.
PING
UP.
This
oan
be obtained cheaply
at
any
Sarage
or
chem.ist's shop (see
page 62).
To gain
access
to the
battery oD
machines
fitted with
swinging arm rcar
suspension, remove the
two
bolts
under
the dual
seat
at the
rea..
The
seat
can then be
drawD
backwards out
of
its front locatiDg grooves
and clear
of
the machine revealing the battery.
Remove the
two small
bolts holding the battery strap over the
battery and
unscrew
the battery
terminals.
The battery
can
then
be
lifted out.
c"a"t
*.
Elåffih" oil
level
and toD uD
if
necessarv.
The
oil
is
added
rhrough lbe
filler
cap
.qf,!ff,i!$-o4,
the
Æ,JlrÅ'ht
lhand
side
of
the box, rhe
holi
{&(fr{Whre
-'''o'dffClfi,in.O
oil
level. On
Comp and
Swinging
Årm
models
the gearbox
is
fitted with
a level plug,
see
K,
Fig.
13. In the
case
of
new
machines,
drain
the
gearbox
after
the
first
500 miles as explained on
page
19.
EVERY
I.OOO
MILFS.
Hubs. Inje.t
gxease through
tåe
nipple in
the c€ntre
of the
hub.
Do not over-lubricate
as
gease may be
forced on to
the brake
linings
and
cause
ineffective brakes, Three
or
four
strokes
of the geåse
guD should be ample. Do
Bot
lubdcste with oil.
Steering
Head.
Lift
machine and place a box und€r the
grankcase
so that front
wheel
is
clcar
of
the
ground.
T€st
for
play
in
the steedng head
by trying
up-and-down
movement.
Che.k
also
that
ste€ring is free
(i.e., that
the
ball
race
adjustmetrt
is
not
too
close.)
If
necessary,
adjust
ås explained on
page 2A.
i