Norton Service Release Database N70

SERVICE RELEASE N70

NATURE OF RELEASE: Disc Brake preparation MODELS AFFECTED: 1972 Commando with disc brake DISTRIBUTION: Worldwide (Trade Only) EXPLANATION: Will all concerned note that the hydraulically operated disc brake assembly is filled to the correct level with Norton Lockheed Series 329 Fluid, bled and tested prior to leaving the Factory. Since the system is sealed against fluid leakage, it is packed without being drained and in the majority of cases can be put into service without further attention. However, certain conditions encountered during packing may result in damage or leakage. We therefore recommend checking the fluid level after lifting the bellows seal out of the master cylinder. The correct level is 1/2in. (12. 9 mm) from the top of the master cylinder reservoir less lid. Top up if necessary with the recommended fluid. Test for air having entered the system by applying the brake firmly. Any sponginess" in feel should be rectified by bleeding as detailed in the Owners Handbook. If however the brake has a positive feel and no trace of sponginess, it requires no attention.   December 1971 Norton Villier Canada Limited