Norton Commando Workshop Manual

## Brakes, Weels and Tyres

# H

### SECTION H14

### TIRES

Tire changing is largely a matter of technique and what to the layman may seem a difficult task is perfectly straightforward when the correct technique is followed. To change either tire, the wheel must be removed. See Sections H6&8forfrontwheelremovaland Section H1 for rear wheel removal. The same basic principles apply for all types of tire - lubricate the headings such as with soapy water, to allow the headings to slip easily over the rim, use heel pressure wherever possible in preference to tire levers for easing the tire on to the rim and minimise the risk of damage by "nipping" and ensure that the opposite side of the tire is pressed well into the rim well to provide maximum freedom where the beading is being slid over the wheel rim. Note: that the rear tire only has one security bolt to prevent tire "creep" such as under hard acceleration. No security bolt is fitted to the front tire. For this reason separate routines are given for front and rear tires. The full technique is as follows:
Removing Front Tire (No security bolt)
1 | Remove the dust cap from the valve and using a suitable notched type of cap or removal tool, unscrew the valve core to deflate the tire completely.
2 | Remove the knurled ring securing the valve at the rim. Store the cap, core and knurled ring clean for re-use.

3 | Lay the wheel down, if possible on a clean surface to avoid scratching and, also to prevent damage to the front axle. In the case of a disc brake wheel, leave the disc uppermost.
4 | Tread the tire beading away from the rim - after a great deal of service the tire beading has a tendency to stick.
5 | Brush a lubricant such as soapy water onto the tire beading and rim and also dip the tire levers (two short ones are recommended) in the solution before each leverage.
6 | Insert the first lever between the tire valve and rim at the valve position, press the opposite side of the tire down into the rim well and apply leverage (see Fig. H18).
7 | Insert the second lever approximately 4 in. (100 mm) from the first and lever the tire beading over the rim.
8 | Remove the first lever and re-insert at the next stage, continuing round the rim a little at a time (see Fig. H19) until the beading can bepulledclear of the rim.
9 | Push the valve out of the rim and withdraw the inner tube.
10 | If it is required to remove the tire from the rim, hold the wheel upright and apply pressure to a lever inserted between the second beading and wheel rim.

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