Instruction manual

WHEEL BEARINGS AND ADJUSTMENT

The wheel bearings are of taper roller type. The inner bearings for the rollers are

integral with the wheel spindle in the case of the front wheel, and are separate tracks

that are threaded on the centre spindle in the case of the rear wheel, (Reference to

Illustration 24 will make that clear.) The outer cups for the rollers are pressed into the

hub shell. They have a fixed location one side and an adjustable location on the other.

The fixed location is provided by a circlip in a groove cut in one end of the hub shell,

while the adjustable location is regulated by a screwed ring that is threaded into the

opposite end of the hub and the position of which can be locked by an encircling nut.

On the rear wheel the adjusting ring is located on the left-hand side of the hub while,

on the front wheel, the adjustment is on the right-hand side.

It is rarely necessary to make adjustment to wheel bearings. It is most important they

are not adjusted too tightly as this would quickly ruin them. There must always be a

slight amount of end play. This should be about .002", which represents adjust perceptible

rim rock, (Not more than 1/64" rock.)

To adjust the rear wheel bearings the wheel must first be removed from the machine,

but those of the front wheel can be dealt with in situ,

A service method of ensuring correct adjustment is :

Slacken the lock nut.

Tighten the adjusting ring until all slackness has been taken up.

Slacken back the adjusting ring exactly one-half turn.

Tighten the lock nut, making sure that, when doing so, the adjusting ring does not creep

round.

TO DISMANTLE A FRONT WHEEL BEARING

These instructions need reference to the upper part of Illustration 24.

Remove wheel from machine.

Remove nuts, and brake cover plate with shoes, etc., from left-hand side of wheel.

Turn to right-hand side and slacken lock nut. (11.)

Completely unscrew the adjusting ring (10) and take it away with the lock nut (II)

still on it.

Carefully apply steady pressure on the threaded end of the wheel spindle which will,

in turn, eject from the opposite end of the hub the cup housing for the oil seal (9), the

oil seal (8), the metal washer (7) that is behind the oil seal and the outer cup (6). These

may be lifted away as they emerge.

The front wheel spindle (6), with its two sets of rollers in cages, may now be lifted out

of the hub.

Turn to the left-hand end of the hub, carefully apply steady pressure on the visible

washer (avoiding fouling the circlip that can be seen in the hub end), so that the complete

left-hand assembly of oil seal and outer cup is pushed a trifle further into the hub shell.

This will take off pressure on the circlip, thereby making its extraction an easy matter.

Extract circlip (I), and then, reversing the hub, apply pressure on the inside edge of the

outer cup (6), so that it is forced out of the hub. As it emerges it will push in front of it,

the oil seal external plain washer (2), the oil seal (3), with its encircling spacer collar (4)

and the oil seal inner plain washer (5), all of which can be lifted away as they appear,

to be finally followed by the cup (6).

The dismantling is then completed.