Reassembly Of Cush Drive - Royal Enfield G Workshop Maintenance Manual

ROYAL ENFIELD 350cc and 500cc O.H.V. WORKSHOP MANUAL

REASSEMBLY OF CUSH DRIVE

When reassembling the cush drive the entry
of the vanes between the rubbers will be
facilitated if the latter are fitted into the driving
shell first and then tilted. The rubbers should be
liberally painted with soapsuds to facilitate entry
of the vanes.
When reassembling the cush drive coat the
inside of the bore of the sprocket/brake drum
liberally with grease where it fits over the hub
barrel and also put grease on the inner face of the
lockring. The three Simmonds nuts should be
tightened down solid as there is a shoulder on the
stud which prevents tightening of the nuts from
locking the operation of the cush drive.
11. Reassembly of Brake Shoes, Pivot Pin and
Operating Cam into Cover Plate
No difficulty should be experienced in
carrying out these operations. Make sure that the
pivot pin is really tight in the cover plate and put
a smear of grease in the grooves of the pivot pin
and on the operating face of the cam ; also on
the cylindrical bearing surface of the operating
cam if this has been removed. Fit the operating
lever and trunnion on its splines in a position to
suit the extent of wear on the linings and secure
with the nut. The range of adjustment can be
extended by moving the lever on to a different
spline.
12. Centering Cam Housing
Note that the bolt holes in the cam housing
are slotted, thus enabling the brake shoe
assembly to be centered in the drum. It is not
intended that on rear brakes the cam housing
should be left free to float but the shoes should
Fig. 5
be centered by leaving the screws just short of
dead tight. The brake cover plate assembly with
the shoes should then be fitted over the spindle
into the brake drum and the brake applied as
hard as possible by means of the operating lever.
This will centre the shoes in the drum. The
screws should then be tightened dead tight and
secured with the locknuts. If the shoes are not
correctly centered the brake will be either
ineffective or too fierce, depending on whether
the trailing or leading shoe first makes contact
with the drum. With the brake assembly
correctly centered and the screws securing the
cam housing correctly tightened wear on both
linings should be approximately equal.
13. Final Reassembly
Replacing Wheel
Before replacing the felt washers which form
the grease seals, pack both bearings with grease.
Recommended greases are Castrolease (Heavy),
Mobilgrease (No. 4), Esso Grease, Energrease
C3 or Shell Retinax A. These are all medium
heavy lime soap or aluminium soap greases. The
use of H.M.P. greases which have a soda soap
base is not recommended as these tend to be
slightly corrosive if any damp finds its way into
the hubs.
Make sure that the inside of the brake drum
is quite free from oil or grease, damp, etc.
Replace the felt washers, distance collars, the
brake cover plate assembly, speedometer drive
gearbox, distance collars, chain adjuster cams,
the loose section of the spindle and the spindle
nut. The wheel is then ready for reassembly into
the machine.
14. Wheel Rims
The rim used on the "250 Clipper" and
Model " S " is Type WM 1-19 in., internal width
1.60 in. The rim for the Model "G" and Model
"J2" is WM2-19 in., internal width 1.580 in.
The rim diameter after building is the same in
each case, i.e., 19.062 in. the tolerances on the
circumference of the rim shoulders where the
tyre fits being 59.930/59.870 in. The standard
steel measuring tape for checking rims is 5/16 in.
wide, .011 in. thick and its length is
59.964/59.904 in. All rims are pierced with forty
holes for spoke nipples.
Note that two
used"Dunlop" and "Palmer Jointless." These
differ in the positions of the pierced spoke
holes. The Dunlop rims have a group of three
holes on one side of the centre line, then a single
hole on the other side, a further group of three
and a single hole and so on. Palmer rims have
the holes alternately spaced either side of the
centre line. Both rims are interchangeable and
of Hub before
makes of rim are
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