Owners Manual
L/2
REAR
SUSPENSION
B
Fig. 2. Rear spring.
A. Free Length
B.
Total
length.
C. Deflection.
Dismantling a Spring
First remove the binding tape. Grip the spring in a
vice,
with the vice jaws against the top
and
bottom
leaves, adjacent to the centre bolt. Free the two outside
leaf clips by opening them out with a suitable punch
and hammer.
In
the case
of
the two inside leaf clips, the
riveted pin should be unscrewed, or
if
this is not possible
the threaded end should be centre-punched and counter-
sunk away with a drill. The pin can then be driven out
and the centre bolt withdrawn.
Carefully open the vice when the spring leaves,
together with the zinc interleaving, will separate. These
should now be thoroughly examined for signs
of
failure
or cracks. Replace any defective leaves, thoroughly
clean and regrease. Also see that the rivets are tight
which hold the leaf clips to the bottom spring leaf
of
those leaves they secure.
Replace the spring in a vice. Utilising a rod
of
similar diameter to the clamping bolt and having a taper
end, position the leaves so that the clamping bolt can be
readily replaced, without the risk
of
damage to the thread.
Replace the clamping bolt and
nut
followed
by
the
leaf clips which should be carefully refitted. New pins
will have
to
be fitted to the inside
leaf
clips.
Renewal and Replacement of Shackle Bushes Spring Eye
Spring Eye Bushes: These are
of
the silentbloc type
and must therefore be pushed clear
of
the spring eyes
by applying pressure to the outer bush
of
the assembly.
A tool similar to that shown
in
Fig. 3 will greatly sim-
plify this operation.
Part
of
the tool can also be used for
replacing the silent bloc bush which must be so positioned
that its outer bush is perfectly central
in
the spring
eye.
Again pressure must only be applied to the outside bush.
When the shackle pin is inserted the nut must be pulled
up tight otherwise the silentbloc bush will not operate
properly.
Frame Shackle Bush: This
is
of
the phosphor bronze
type and
is
in two halves. Each
half
of
the bush can be
driven clear
of
the frame housing by inserting a narrow
drift through the shackle pin opening to bear against
the inner end
of
the bush.
When the old bushes are removed check that the
oiling nipple for this shackle is quite clear
and then drive
the new bushes into position. Lightly grease the shackle
pin and insert into the bushes. The tapered end
of
the
shackle pin, on which the single
nut
and spring washer
are fitted, must be tightened first as this will ensure that
the shackle link is firmly positioned
on
the pin. The nut,
spring washer and locknut on the other end
of
the pin
must next be secured sufficiently tight to eliminate end
play
in
the shackle, but
not
so
tight that
it
is impossible
to
~ove
the shackle links forward or backward.
Replacing a
Spring
When the spring is fully assembled it should be fitted
first
at
the anchor end and then
at
the shackle end.
Remember that the shackle nuts must be pulled up tight,
as
previously described for the silentbloc bushes. Finally,
fit the spring securing clips and secure the springs to the
axle.
Place spring washers under the Simmonds nuts
and tighten them securely.
Do
not
forget the pad placed
between the spring and the rear axle.
Fig. 3. Removing a silentbloc bush from the spring
eye.