No. 1 MK III Problems - Help needed.

[Peter Laidler]

Thinking about this, the tech information says that the bolt head must never leave the track under any circumstances. If it does, it indicates a distorted or a worn body. That set me thinking....... how worn can it be for heavens sake before the bolt head leaves the track.

It's simple! If the rear boltway on the body is worn away, and they often are, it will allow the bolt to twist over to the right and taking accumulative error into account, a lot of wear at the rear will allow the front of the bolt and bolt head to move to the right. The nett result is that the overhang of the bolt head will clear the body at the front of the track. Just as it's done in this case.

So your problem P-07 can only be one of three things. Worn body, worn bolt or distorted body