DISMANTLING AND REBUILDING
FULL-WIDTH REAR WHEEL HUBS
Removal of the Bearings
It is important that bearing parts are not
mixed.. The roller race and its associated cup
must be replaced together and not interchanged
with those of another bearing.
(h) To facilitate removal of the bearing
cups gently heat the hub shell
(i) Place on the outer face of the brakeside oil-seal distance piece (6) a short
rod of 7/8-inch diameter — preferably a
soft metal such as brass — and apply
pressure so that the far bearing cup and
the caged roller race are pushed out of
the hub tunnel. The distance piece (8)
and the caged roller race of the near
bearing will also be ejected.
NOTE This operation can be performed by
jarring the soft metal rod with a hammer, but the utmost care must be taken otherwise the bearings or hub shell may be damaged.
To deal with the circular locking nut a hookspanner is required. Part No. 010438. It can
be obtained from the Service Department.
The numbers shown thus: (2), refer to the numbered parts in the illustration.
(a) Disconnect the Speedometer driving
(b) Remove the lock-nut (16) which
secures the speedometer-drive gearbox
Remove the wheel from the frame.
gearbox is mounted; the lock-nut (13)
and the hub cover disc.
Remove the oil-seal retaining washer
(3), the oil seal (4) the oil-seal cup (5),
and oil-seal distance piece (6). These
can be hooked out with the shank of a
small and narrow screwdriver.
HE wheels are carried on adjustable, taper
roller bearings. The bearing cups are a
press fit in the spindle tunnel; the left-hand side
bearing is located in the hub by a circlip lying
in a groove at the end of the tunnel, and the
right-hand side bearing is adjustable for position. It is moved axially by a screwed sleeve
which is threaded into the right-hand end of
the spindle tunnel and is locked into position
by a circular nut.
Spring Frame Models
(d) Grasp the speedometerdrive gearbox with the
fingers and firmly pull
it away from the hub.
(e) Slacken the
(f) Unscrew and remove
the adjusting sleeve (14).
With it will come: the
sleeve (2) upon which
NOTE After adjusting the bearing and before
tightening the circular lock nut (13)
the hub cover disc must be placed in the correct
position, that is, the hole in the disc face must
be in line with the grease nipple located in the
hub shell so that a grease-gun nozzle can be
inserted through the hole and engage with the
nipple. When the correct position has been
found, tighten the lock nut (13).
(h) Slide the right-hand, side roller race on
to the spindle and seat is squarely into
the inner recess of the distance piece (8).
(i) Refit the bearing cup with the open end
facing inwards. It may be necessary to
re-heat the hub to allow the cup to go
into position without difficulty.
Do not crush the bearings together, leave
some end play, the final adjustment is
Withdraw the spindle.
(j) Refit: oil-seal distance piece (6). oil-seal
cup (5) oil seal (4), and the small oilseal retaining ring (3).
(k) Thread the speedometer gearbox sleeve
(2) through the bearing adjusting sleeve
(4) and insert the sleeve into the hub
cover disc. Now screw the sleeve into
the hub until it comes into contact with
(l) Before completing the assembly of the
hub, the bearings must be adjusted.
For details see: Maintenance Instruction
(m) Push the speedometer gearbox on to its
sleeve (2) and ensure that the dogs
engage with the slots in the adjusting
(n) Refit the lock-nut (16) but leave it slack.
(o) Refit the wheel in the frame and check
that the bearing adjustment is correct.
Readjust it if it is incorrect.
(p) Position the speedometer gearbox with
the cross-piece uppermost and lying
Tighten the lock nut (16) and refit the
speedometer driving cable.