Frame Rear Suspension; Description Of Frame; Removal Of Rear Spring Box Unit / Servicing Rear Spring Box; Removal Of Swinging Arm Chain Stay - Royal Enfield 350 BULLET 1989 Workshop Maintenance Manual

WORKSHOP MANUAL BULLET

FRAME REAR SUSPENSION

1. Description of Frame

The frame is built of special cold drawn welded steel tubing incorporating reinforcements wherever
necessary, for extra strength.
The swinging arm unit forms the chainstay and is fitted with rubber bonded 'silent-bloc' bushes.
The swinging arm unit is secured to the main frame by a long bolt passing through the pivot lugs.

2. Removal of Rear Spring Box Unit / Servicing Rear Spring Box

Remove the top pivot pin nut, drive out the pivot pin, then
hinge the suspension unit back on the lower pivot pin. After
removing the lower nut, the unit may be pushed off the
pivot pin welded to the fork end. It is a sealed unit and the
internal mechanism cannot be serviced. Outer dust cover
can be removed using special tool PED- 2039 for cleaning
coil spring.

3. Removal of Swinging Arm Chain Stay

Remove the rear wheel, chain rear sprocket and brake
cover plate assembly from the swinging arm chain stay.
Remove one of the pivot nuts and pull the pivot pin from
the other end. The chainstay can then be pulled out of the
frame.
The life of the rubber bonded silent-bloc bushes is very
high. But if it is necessary to replace the bushes, the inner
sleeves will have to be pressed out first on a press. The
rubber can then be taken away from the outer sleeves by
pliers. The outer sleeves can be driven out by means of a
hammer and a suitable drift.
Replace the rubber bonded bushes in the swinging arm,
using a suitable drift, press one bush from one end of the
pivot bearing tube under a press, until the metal outer
sleeve is flush with the end face of the pivot bearing tube. While pressing, it must be ensured that
pressure is exerted only on the outer sleeve and not on the inner sleeve of the bush, as axial pressure
on the inner sleeve would destroy the bonding of the rubber to the metal sleeves. Similarly press the
second bush from the other side of the pivot bearing tube until the metal outer sleeve is flush with its
end face.
While assembling, the swinging arm fitted with rubber bonded 'silent-bloc' bushes, to the frame,
the pivot nuts should be fully tightened only with the swinging arm positioned in the mid stroke of the
spring boxes, i.e., when the centre distance between the spring box top mounting hole in the frame and
the bottom mounting pin on the swinging arm is 9.75". This is recommended so that, the rubber bush
will be subjected to minimum angular movement in either direction from the mid stroke.
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REAR SPRING BOX REMOVAL