1957 Petter AVA1 Diesel Engine "Overload Stop"

If anyone having an older Petter diesel engine has read the starting procedure in the manual, they've no doubt come across something called an Overload Stop. Folks may not understand what this mechanism does. I was one of those folks when I bought my 1948 Gibson D tractor that has a Petter AC1Z diesel engine on it. There was this funky lever that the instructions (and previous owner) said to move down and release. I (and the previous owner) had no idea what it did but I found out later that it is called "Overload Stop". And not until I got this new-to-me AVA1 engine did I realize what the Overload Stop actually does. On the AC1Z engine, the fuel injector pump rack is enclosed so I can't see what is going on, but on this AVA1, the pump and rack are hanging out there for all to see, and the Overload Stop is also right there. Well, if my engine had one, it would be right there, but unfortunately the Overload Stop contraption was missing. Not having anything better to do while recovering from rotator cuff surgery, I decided to make one today on the Smithy mill.

1957 Petter AVA1 Diesel Engine Welding Broken Cast Iron Pump Gland Clamp

One of the cast iron clamps that seals the Gardner-Denver water pump shaft on the Petter engine's trailer is broken into three pieces and is missing some chunks. Someone had brazed it together in the past and filled in a lot of voids with what looks like JB Weld.

1957 Petter AVA1 Diesel Engine Loose Flywheel

Ok, it's not as bad as the title sounds, but the flywheel was slowly working itself outward on the crankshaft. Thus the interference with the fan shroud that I'd noticed the first time I started this engine. I had previously spent a day tweaking the shroud around so it didn't scrape on the flywheel and I'd thought to myself that the shroud was sure a close fit to the flywheel, but it didn't dawn on me that the flywheel could be the culprit. Today I started the engine and noticed the rubbing noise again. Hmm, there must be something going on. I then realized the flywheel had moved closer to the shroud. Time to take action.