Norton Commando Workshop Manual

## Engine/Primary Transmission

# C

### SECTION C27

### RE-ASSEMBLY OF THE CRANKSHAFT

Prior to assembly, it is vital to polish the crank journals using a fine grade emery tape then make absolutely sure that all parts are washed very thoroughly in gasoline (petrol) until clean. Ensure also that the oil ways are clean and blown through with an air line.
Re-assembly proceeds as below:
1 | Fit the drive side crank cheek to the flywheel, mating the markings previously made. The reason for this order of assembly is that the bolts fit drive side to timing side.
2 | Fit the two studs through from drive side to timing side. Position the locking tab over both of the, studs from the drive side and fit the nut.
3 | Assemble the timing side crank cheek over the studs and the dowel in the flywheel.
4 | Assemble the four remaining bolts, driving side to timing side, noting that the bolts are a good fit into the crank cheeks and will in all probabilty need to be tapped home with a drift.
5 | Fit the second tab washer over the studs, followed by the stud nuts.
6 | Tighten the six nuts, commencing with the two washers and then proceeding diagonally, tighten the others.
7 | Tap over the tab washers or use vice grips to bend the tabs over.
8 | Ensure that the oil way blanking plug is fitted in the timing side crank cheek, particularly if a new timing side crank cheek is in use.

### SECTION C28

### RE-ASSEMBLING CONNECTING RODS TO CRANKSHAFT

As a matter of practice always use new bearing shells and at the time of fitting the shells, smear them with clean engine oil. Proceed as follows:
1 | Press the drilled shell into the connecting rod big end eye and rotate into position, locating with the tab.
2 | Fit the plain shell into the connecting rod cap and again locate the tab. The tab positions are shown in Fig. C33.
3 | Fit the connecting rods but before doing so, note that it is unnecessary to renew the connecting rod bolts though new nuts should always be used. The connecting rods must be fitted with the oil holes from the big end eye outwards in each case. Fit the end caps with shells, ensuring that the mating marks align, and tighten the nuts evenly by hand.
4 | Tighten the connecting rod nuts to a torque reading of 25 Ibs./ft. (3.456 Kg/m).

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