Norton Commando Workshop Manual

## Engine/Primary Transmission

# C

### SECTION C16

### DISMANTLING THE CRANKCASES

The majority of the work on the crankcases can be carried out best with the crankcase mounted in a plain jaw vice as shown in Fig C19.
The basic order of dismantling is to remove the timing cover and dismantle the camshaft chain and sprockets, then the oil pump. At this stage the crankcases shoud be removed from the vice to be parted for removal of the crankshaft. The full routine is described below:
1 | If the remaining crankcase bottom bolt is still fitted, this shoud be removed to allow the crankcase to be mounted securely in a vice.
2 | Remove the two contact breaker cover screws and lift away the C.B. cover.
3 | Remove the contact breaker cam centre bolt, serrated washer and plain washer.
4 | Using service tool 060934 as shown in Fig C20, screw the tool home through the contact breaker cam until the cam is lifted off the camsheft taper. It is unnecessary to remove the contact breaker plate from the timing cover at this stage unless so desired.
5 | Remove the timing cover screws and part the joint between the timing cover and crankcase by a careful tap from behind the pressure release valve body using a hide hammer.

6 | Lift the timing cover away, withdrawing the contact breaker lead from the timing case. It may be necessary to turn one of the snap connector bullets backwards so that the lead feeds through the case, one snap connector bullet at a time.
7 | Remove the two nuts securing the oil pump. The oil pump may be quite tight on its studs and in these circumstances it is advantageous to turn the oil pump drive wheel nut so that the oil pump will pull itself away along the worm drive. This operation is shown in Fig. C21.

<< | < | rocbo.net | >