Norton Commando Workshop Manual

## Engine/Primary Transmission

# C

12 | Using Service Tool ET.2003 as shownin Fig. C24, extract the crankshaft pinion. It should be noted that the jaws of the service tool locate to the spaces provided in the pinion backing washer.
13 | Lift away the pinion key which is of the Woodruff type. Remove also the backing washer.
14 | Remove the oil sealing disc which is lipped. This disc tends to cling to the main bearing due to thepresence of oil and the use of two small magnets or some other means is recommended to lift the disc clear.
15 | If desired, the timing chain tensioner, clamping plates, nuts and fan disc washers can be removed from the crankcase at this stage.
16 | Dismount the crankcases from the vice so that they may be parted and the crankshaft assembly extracted.
17 | Remove the crankcase breather pipe complete with elbow by slackening the locking nut at the crankcase. On models after engine number 200000 remove the breather and breather pipe as an assembly, after removing the locking wire, or flattening the tab washer and taking out the two securing bolts.

18 | Remove the two studs, one bolt and two set screws, holding the crankcases together. Unless the additional bottom stud has been removed to mount the crankcases in a vice, the stud should be removed at this stage.
19 | Part the crankcases, releasing the crankcase joint by the use of bar of wood against the drive side crankcase as shown in Fig. C25.
20 | As the drive side crankcase is lifted clear, collect the rotary breather disc and spring from inside the drive side camshaft bush.
21 | Withdraw the camshaft from the timing side crankcase and on engine numbers before 200000 collect the detachable chamfered thrust washer. On the later engines there are 2 thrust washers with tabs engaging to holes in the crankcase. Collect these and ensure that they are properly located on reassembly.
22 | Part the timing side crankcase from the crankshaft. This practice is preferred to removal of the crankshaft from the crankcase. Removal is accomplished without striking the end of the crankshaft by the use of a tubular drift driven against the crankshaft shoulder. Fig. C26 illustrates a suitable tube fitted over the crankshaft, the tube

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