Norton Commando Workshop Manual

## Brakes, Weels and Tyres

# H

Dismantling
Before dealing with the axle and bearings, separate the brake assembly from the brake drurn, then the brake drum from the wheel hub.
1971 and later models utilise shock absorber pads of polyurethane in the hub into which the shock absorber paddles on the brake drum fit. Therefore, on 1971 and later models, the hub can be lifted away from the brake drum without further dismantling.
On pre 1971 models, remove the three blanking plugs from the hub disc and, using a socket wrench, remove the three sleeve nuts securing the hub to the brake drum and separate these items. Lift the brake plate complete with shoes away from the brake drum.

### SECTION H4

### REAR HUB DISMANTLING

In order to change the wheel bearings, remove the wheel complete as described in Section H3. In the case of pre 1971 rear wheels without shock absorber, the wheel should be parted from the brake drum by removal of three extended nuts from the right hand side. On this type of wheel, illustrated in Fig. H5 there is no bearing in the brake drum. The wheel fitted to 1971 and later models should be removed complete as described in Section H3. With the wheel axle removed, separate the brake drum from the wheel hub the "paddles" on the brake drum are merely a push in fit between the polyurethane shock absorber segments. On the 1971 type, a double row ball journal bearing is fitted to the rear brake drum. The bearing arrangement differs between 1971 and earlier models in the wheels, as will be seen from Fig. H6, the later wheel containing an additional double row bearing in the brake drum but a pair of single row bearings in the wheel hub.
Pre 1971 models - See Fig. H5.
To dismantle this type of rear hub proceed as follows:
1 | At the speedometer drive box side of the wheel unscrew the LEFT HAND THREAD lockring using peg spanner tool, 063965 and remove.
2 | Take out the distance piece and felt washer.
3 | Take the rear axle with thick washer and fit over it the large plated spacer which fits between the speedometer drive box and fork end.
4 | Insert the axle with washer and spacer through the double row ball journal bearing from the brake drum side of the hub (the brake drum has previously been removed).

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