Norton Commando Workshop Manual

## Frame and Ancillaries

# F

17 | Dismantle the engine steady (see C1) by removing the nuts and washers from the rubber mountings first, to prevent them turning in the frame. Release the two studs and lift away with the side plates. Remove the main engine steady plate by taking out the three socket screws and washers. Note that the centre screw secures the ground (earth) lead tag.
18 | Remove the rocker feed plpe after taking out the three banjo bolts. Collect the copper washers for re-use.
19 | Release the coil cluster from the frame as an assembly (on pre 1 971 models two bolts are used: on 1971 and later models, four bolts are used). Disconnect the H.T. Ieads at the sparking plugs then tie the cluster clear of the engine unit with all other leads still attached.
20 | Detach the carburetors from the cylinder head complete with manifolds and balance pipe. Either removal or refitting of the securing screws is facilitated by the use of a shortened socket screw key. Lay the carburetors and manifold assembly still attached to the throttle and air cables over the headlamp clear of the engine unit.
21 | Disconnect the contact breaker leads from the main harness in the area of the frame top rails.

22 | Disconnect the oil tank end of the engine breather pipe.
23 | Place a receptacle of sufficient size to contain the contents of the oil tank below the rear of the crankcases, remove the bolt securing the oil junction block to the crankcases, pull the block and pipes away from the crankcases and allow the oil to drain. Alternatively after parting the junction block from the crankcases, raise the junction block and tie with wire to the airbox to prevent oil draining from the tank, or protect the feed pipe with cardboard and compress the pipe with grips to prevent oil draining (see Fig. F1).
24 | Slacken clutch cable adjustment and lift the cable nipple from the handlebar control.
25 | Remove the front engine mounting by taking out the centre bolt, sliding back the left gaiter and removing the mounting collar, polyurethane washer and gaiter as a set. Remove the right gaiter etc. in similar manner. Remove the two mounting-to-crankcase studs (bolts on later models) and lift away the mounting.
26 | On 1971 and later models, remove the centre stand. This is secured by bolts fitted from inboard. Lift the spring clear as the stand is removed
27 | On pre 1971 models, remove the earth lead from the side stand bracket to bottom crankcase stud.
28 | Disconnect the two alternator leads at the snap connectors.
The power unit assembly is now secured to the frame only by the rear mounting. Before removing the rear mounting stud, coil the clutch cable by the gearbox. Unclip the C.B. Ieads from the frame and coil them by the timing case. Protect the lower frame rails against damage using cardboard or thick cloth.
29 | Support the weight of the power unit and use a soft drift to drive out the rear mounting stud.
30 | Collect the gaiters, collars, end caps and footrest plate spacers.
31 | As shown in Fig. F2, lift the power unit bodily from the frame to the right hand side. Raise the front of the power unit and lower the rear to clear the airbox.

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