Royal Enfield 350 BULLET 1956, Workshop Maintenance Manual

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ROYAL ENFIELD WORKSHOP MANUAL
Section L13 Page 4
Remove this bearing first, then enter the loose
section of the spindle into the spacer and drive out
the remaining bearing by means of a hammer and
drift applied to the hexagon-headed end of the
spindle.
8. Hub Bearings
These are deep-groove single-row journal ball
bearings. The sprocket/brake drum bearing is a
Skefko RLS7, 7/8 in. i/d, by 2 in. o/d, by 9/16 in.
wide. Equivalent bearings of other makes are
Hoffmann LS9, Ransome & Marles LJ. 7/8 in.,
and Fischer LS9. The two bearings in the hub
barrel are Skefko RLS5, 5/8 in. i/d, by 1.9/16 in.
o/d, by 7/16 in. wide. Equivalent bearings of
other makes are Hoffman LS7, Ransome &
Marles LJ 5/8 in., and Fischer LS7.
9. Removal of Hub Driving Pins
To remove the six driving pins from the
aluminium fullwidth hub, first remove the hub cap
after unscrewing the three screws attaching it to
the hub. Unscrew the six Simmonds nuts and
drive out the pins.
10. Refitting Ball Bearings
To refit the sprocket/brake drum bearing, use
a hollow drift as shown in Fig. 4. The bearing is
first fitted to the fixed section of the spindle ; the
spindle and bearing are then entered into the
sprocket/brake drum and driven home, preferably
under a press or using light hammer blows.
The two bearings in the hub barrel are pressed
in, using the drift part of E.4823. First assemble
the bearing into the circlip grooved end of the
barrel and fit the circlip. Replace the bearing
spacer, the slot in the spacer can be at either end of
the hubs, and assemble the second bearing,
supporting the hub on the inner race of the other
bearing. If the drift part of E.4823 is not available
it is essential that the last bearing is assembled by
applying pressure to both inner and outer races
simultaneously to avoid pre-loading the two hub
barrel bearings.
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 to
the cylindrical bearing surface of the operating
cam if this has been removed. Fit the operating
lever and trunnion, 23371, 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,
26347, 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
be centred by leaving the screws, 26309 and
35140, 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 of Hub Before
Replacing Wheel
Before replacing the felt washers which form
the grease seals, pack all bearings with grease.
Recommended greases are Castrolease LM,
Mobilgrease MP, Esso Multipurpose Grease H,
Energrease L2, Shell Retinax A or Marfak
Multipurpose 2. 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 it 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,
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