Norton Service Release Database N18

SERVICE RELEASE N18

NATURE OF RELEASE: Stiff Clutch Action. MODELS AFFECTED: All Commando. PARTS AFFECTED: 064715 Clutch Operating Arm. DISTRIBUTION: Worldwide. EXPLANATION: Following Service Release N. 12 on this subject, we learn that in some cases dealers have been fitting the ATLAS clutch arm 040029, in lieu of the Commando olutch arm 064715 in an attempt to cure stiffness. The ATLAS arm is unsuitable for the diaphragm clutch of the Commando since it provides Insufficient lift. This results in clutch drag and in order to compensate, the tendency is to take up clutch free play and clutch slip will result. The polishing operation on the Commando clutch arm has been improved on production and this has given a much better clutch action.   ACTION: Where the problem of stiffness persists after the clutch cable route has been improved, remove the gearbox outer cover to gain aocess to the clutch arm. Relieve the end track of any burrs or roughness and burnish, First with a coarse, then a very fine grade of emery paper. Ensure that the body on which the clutch arm pivots has not turned as the locking ring has been tightened. If it has, tho clutch arm will not move vertically and the clutch cable will distort as the operating arm pivots. To reposition, slacken the locking ring, turn the body as required and re-tighten the ring. Reassemble clutch arm with a smear of grease on the end track. August 1970 Norton Villiers Canada Limited