Norton Commando Workshop Manual

## Engine/Primary Transmission

# C

10 | Fit the camshaft sprocket nut which is normal right hand threaded.
11 | In order to tighten both the oil pump driving worm nut and camshaft sprocket nut securely it is necessary to sprag the crankshaft with a suitable bar placed in the deepest of the flywheel balance holes as shown earlier in Fig. C22 Under no circumstances tighten the camshaft sprocket nut by shocking using a box spanner, tommy bar and hammer since an even pressure is required specifically for tightening this nut. Tighten securely the timing pinion nut.
Prior to fitting the oil pump it is desirable, if the pump has been stripped or parts renewed, to prime this. The pump should be turned by hand and oil fed into the gears by the use of an oil gun. Very late engines use a joint gasket between the oil pump and crankcase joint faces and where a joint washer is used at this point, under no circumstances should the conical rubber seal between the oil pump and timing cover be equipped with packing shims. Proceed as follows:

12 | Fit the oil pump and secure with two nuts without washers. A torque figure of 10/12 ft. Ibs. (1.383 to 1.659 Kg/m) is required.
13 | Fit a new conical rubber oil scal part number NMT272 on the oil pump outlet stub and dispense with any shims which may have been fitted between the scal and pump body at the time of dismantling. Over compression of the seal will render it unfit for further use.
14 | After the oil pump is secured, recheck the security of the driving gear nut.

### SECTION C31

### REFITTING THE TIMING COVER

The timing cover should be prepared by washing very thoroughly in clean gasoline (petrol) and if necessary by renewing the oil seals as described in Section C26. If a new timing cover is to be fitted, check that the blanking plug is fitted into the boss for the pressure relief valve. These features are shown in Fig. C30.
1 | Fit the contact breaker oil seal protection tool 061359 into the camshatt and tighten. This will allow the contact breaker seal to pass over the camshaft without damage as the timing cover is placed in position.
2 | Pass the contact breaker lead through the hole in the timing case, then locate the cover in position.
3 | Fit the timing cover screws. The odd screw lengths are shown in Fig. C31 butthe remaining screws are all of the same length. Secure the set of scrows.
4 | Remove the contact breaker seal tool 061359.
5 | Prepare the auto advance mechanism by cleaning very thoroughly and lubricating sparingly with clean engine oil. Ensure that the taper for the auto advance cam is clean and dry then offer the auto advance unit loosely into position.
6 | Fit the contact breaker plate, yellow lead rearwards and secure with the pillar studs central in the adjustment slots. For ease of handling at a later stage, centralise both contact breaker plate adjusters. These are indicated in Fig. C47.

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