Norton Service Release Database N15

SERVICE RELEASE N15

NATURE OF RELEASE: Routine check Oil Pump MODELS AFFECTED: Commando- All Editions PARTS AFFECTED: 15511A- Oil Pump Spindle Nut DISTRIBUTION: Worldwide EXPLANATION: During routine work which necessitates removal of the timing cover, it is recommended that a check be made on the security of the oil pump spindle nut - that is the nut securing the straight cut pinion on the front of the oil pump. We have encountered isolated instances of the nut failing to tighten completely due to the Woodruff Key protruding fractionally beyond the pinion.   ACTION: If there is any evidence of the nut slackening, remove the oil pump complete. Remove the spindle nut and, using a claw type extractor if necessary, remove the pinion. Lift out the Woodruff Key and reduce the length with a file so that, on reassembly, the key cannot protrude beyond the pinion, thus preventing the nut from tightening. July 1970 Norton Villiers Canada Limited