hub with a pull-out wheel spindle. A super oil seal is fitted against the
bearing on the brake drum side to prevent grease entering the brake
drum.
A similar oil seal is used in the bearing retaining sleeve at the opposite
end of the hub, also a felt sealing ring.
The hub is packed with grease during assembly, subsequent lubrication
should not be necessary until the machine has covered 10,000 miles, when
the bearings can be re-greased if necessary. (See table of lubricants.)
To remove the front wheel. With the machine on the centre stand, dis-
connect the front brake cable from the brake expanding lever, then re-
move the bolt (securing the torque stay) from the brake plate and release
the spindle nut 000001.
Remove the four nuts securing the detached fork slider caps, take off
both slider caps, when the front wheel can be removed. -
Dismantling the front hub. Both wheel bearings are a press fit into the
hub.
To avoid “scruffing” the bearing housings in the hub during the process
of removing and refitting the bearings, the hub must be gently heated to
cause the hub material to expand and relieve the interference fit. Have
available a new oil seal 029263.
With the front wheel removed, take off the spindle lock nut 029246,
pull out the spindle and brake plate.
Remove oil seal collar 029262.
Prise out the oil seal 029263.
Gently heat the hub in the vicinity of the wheel bearing 029264 (do not
concentrate the applied heat in one place) drop the hub on to a flat wood
bench, when the bearing will move away from the centre of the hub.
Invert the hub, use a suitable drift to drive out the bearing, placing the
drift on opposite sides of the bearing so that it is extracted parallel with
its housing.
Pull out the bearing spacing tube 029266.
Remove the lock ring lefthand thread 029238, also the hub disc.
Unscrew the bearing retaining sleeve 029269.
Re-heat the hub and drift out the second bearing as described for the
first one.
To assemble the front hub. Gently heat the right side of the hub, insert
the bearing and press it fully home by screwing in the bearing retaining
sleeve (lefthand thread). Invert the hub and pack some grease against the
bearing just fitted. Insert the bearing spacing tube and fill some more
grease to the hub. Re-heat the brake side of the hub, insert the bearing
and press it fully home.
Fit the oil seal (metal backing outwards) flush with the hub.
Fit the hub disc and secure it with the lock ring.
Insert the oil seal collar into the oil seal, put the spindle through the
brake plate and the hub and tighten the spindle fixing nut.
Refitting the front wheel. Refit in the reverse sequence given for re-
moval, with the following precautions: Ensure the bolt fixing the brake
torque arm to the brake plate is securely tightened. Do not over tighten
the four nuts securing the two fork slider caps.
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