Allen keys

An aluminium bracket had to be attached to a curved casting ny countersunk head Allen screws in a position out of line-of-sight, which required bending over to ankle height and fitting and removing the bracket many times.

It was most difficult to locate the key into the head of the screw and also line up the hexagon hole and it often speared out of the fingers and always seemed to fall into an inaccessible place.

The screws had to be pulled up a little at a time, which required many insertions and much frustration until it was discovered by accident that an imperial key of slightly smaller size than the metric hexagon cavity could do most of the tightening, then reverting to the metric size for the final pinch which speeded up the job and removed most of the frustration as it was so much easier to locate into the hexagon cavity.

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Battery cables

The use of an electric starter required heavier duty cables than previously required for lighting and accessories.

When fitting it again it dawned that this most dangerous of cables from a short circuit viewpoint had no circuit breaker or fuse, nor had any car I have ever seen.

Should the cable become detached or rub through its insulation currents of up to 1000 amps could be generated with catastrophic consequences.

Perhaps it is too difficult to fit a 400 amp fuse, which is about what is required. Though most batteries are fitted fairly close to the starter motor reducing the risk, racing cars can require the battery somewhere in the rear.

I am still looking into this as I have seen firsthand what happens when a large spanner was dropped across the terminals of a starter battery for a large V12 diesel generator: it glowed red hot instantly for a few seconds then the battery exploded. Fortunately, we all lived to tell the tale, but I have never seen a brown skinned mechanic with such a bleached complexion.

The best place for a circuit breaker is right at the earth terminal of the battery.

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