Norton Commando Workshop Manual

## Engine/Primary Transmission

# C

### SECTION C11

### REMOVING CYLINDER AND PISTONS

Remove the cylinder head as detailed in Section C1. The cylinder is then removed as follows:
1 | Remove the nine cylinder base nuts - to do so, it will be necessary to raise the cylinder slightly to allow the nuts to be removed completely trom the studs. All the nuts have washers excepting the front centre one. Take particular care that all the nuts and washers are removed before the cylinder is lifted.
At this stage the engine may be decarbonized as in Section C4 or the cylinder, pistons and piston rings given attention.

2 | Commence lifting the cylinder off the base studs and prepare to support the connecting rods as the cylinder is lifted clear of the pistons. In Fig. C10 a suitable implement has been inserted between the studs to prevent the connecting rods and pistons falling against the crankcase mouth. Any damage to the connecting rods couid result in failure of the rods at a later stage of use.
3 | Place a piece of clean non-fluffy cloth over the crankcase mouth to prevent foreign matter entering the crankcase mouth.
4 | Remove one circlip from each wrist pin (gudgeon pin).
5 | Before removing the piston, support the body (Fig. C11 ) shows the piston body being supported by a second operative) and push out the first wrist (gudgeon) pin, then the second, using a suitable sized implement such as an aluminium drift.

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