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0
THE
WHEELS,
TYRES AND JACKING
113bl
Fig.
0.5
Pushing
the
tyre bead into the well
Section 0.7
FITTING TYRES
Al~D
TUBES
Inspect the inside of the cover carefully and
remove
all dirt. The
wheel
rim
must he
clean,
free from dust,
and
undamaged
.
DiU!
the inside of
the
cover with
french
chalk.
Inflate
the
tube
u
ntil
it begins
to
round
out,
then insert
it
in the
cover.
Apply
a
frothy
solution
of
soap
and
water
generously
around
the centre base
of the tube, extending
upwards
between
the
tyre beads and
the
tube
itself
for at least
2 in.
(50·8
mrn.)
on
both
sides.
Also apply the solution
to
the
bottom and
outside of
the
tyre heads.
D
o.
not
Fig.
0.6
71u! balam:e marks on the lyre and tube
0.4
allow the solution to run into the
crown
of the
tyre.
The
solution must be strong enough to feel slippery when the
fingers are wetted with the solution
and rubbed
together.
Mount the tyre
on the
rim immediately, whilst the
soap solution
is stiU wet.
Push one edge of the cover over the edge of the rim.
It
will go quite easily if the part
first
put on is fitted on
the
opposite
side of the valve and
is
pushed
right
down
into the
rim
base.
Move
it round so that its balance
spots
coincide with those
of
the
inner tube
when
it
is
inserted
with
the
valve
passing through the
hoie
in
tbe
rim. (Take
care
that the valve, fitted in the
side
of the
tube,
is
on the correct side of the
rim.)
Before inftating be sure that the tyre
beads are
clear
of the well of the
rim all
the way
round,
and
push the
Talve
into the tyre as far as possible in order to ensure that
the
tube
is
not
trapped
betweea the
bead and
the rina,
tbeu
pull it out again into its correct position.
Inflate slowly
until
the beads are fully seated.
Remove the valve core to
deflate tbe
tube
completely.
Reinflate to the correct working
pressure
(see
'
GE!'I;ERAL D
ATA').
This
prooedure
must
be followed
whenever a
tube
is
fitted.
The object of the
double
inflation is to permit any
stretched
portions of the tube to
readj
ust themselves in
th~ wv~r
and
relieve
any local strains in the
t\lbe.
In an
emergency french chalk may
be
used a
s
a sub-
stitute for
the
soap solution,
provided
it is evenly
and
generousiy
applied.
T
his practice,
however,
is
not
recommended.
Repairing
tubes
Punctures
or
injuries must
be
vulcanill:d. Cold
patches should
only
be
used
for
emergen~ies
and cannot
be
relied
upon.
Fig. 0.1
Refitting the tyre to the
wheel
MOA
(Twin
Cam).
Issue
2.
2n6S
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