BRAKES Lightweight Scrambler and 350 c.c. Trials Model The front brake. The front brake is dimensionally the same as the rear brake. Brake adjustment to compensate wear on the linings is effected by finger adjustment on the rear brake rod and front brake cable. After considerable mileage, brake lining wear will adversely affect the leverage of the brake shoe expander. To restore the leverage without relining the brakes, packing washers 000174 are used under the heat treated thrust studs. The washers used must be uniform in thickness, to ensure both brake shoes make contact with the drum simultaneously.
Heavyweight Models
Front brake. The front brake drum is cast in the hub and is machined after the wheel has been built, thus ensuring concentricity. During the process of lacing the wheel spokes, slight distortion can take place. If a wheel is rebuilt and brake efficiency is impaired, the brake drum should be skimmed to restore efficiency. Front brake cover plate. The brake cover is located by a nut 021931 at the back of the plate. This nut is adjusted so that the plate when assembled is flush with the edge of the hub shell. The plate lock nut 018071 is fitted with the hexagonal side against the plate. Water enters the brake. Check the location of the cover plate for correct position. Centralising the brakes. For maximum brake efficiency both brake shoes must contact the drum simultaneously when the brake is applied. Release the spindle nut, also the cover plate lock nut. Closely adjust the brake cable and put pressure on the brake lever. Whilst maintaining the pressure, retighten the lock put and spindle nut, this action will allow close adjustment of the brake shoes, without binding. In exceptional cases the hole in the plate for the wheel spindle can be enlarged a slight amount. Removing the plate lock nut. If there is difficulty in releasing this nut and a vice is not available, put the wheel spindle into one of the fork slider caps, with wheel outside the forks and tighten the clamp nuts. which will act as a temporary vice. Rear brake. The rear brake drum is detachable. The front and rear brake shoes are interchangeable. See details for Scrambler brake for brake shoe adjustment.
WHEELS AND BRAKES 1963 Heavyweight Models For the 1963 season all models were fitted with journal type wheel bearings, as opposed to the taper roller type previously used. No adjustment to these bearings is possible, or necessary; the only attention needed it to renew lubricant and clean every 10,000 miles, the bearings being lubricated on initial assembly. The front wheel. Two journal bearings type RMS 6 are used in the front 90
