pistons used in the 4.00"bore x 4.50" stroke 226 cubic inch A-C engines. This should be handy for everyone doing overhauls to tractor pullers looking at various combinations. I have included engine serial number references and really the key here the letter code at the end of the serial number found stamped into the engine block on the carburator side

of the block approximately 4" to the rear (towards flywheel) and inline vertically with the carburator intake. For example a WD45 tractor with engine serial 45-12345-G the G designates the piston used in that engine originally. Referencing the chart we can see that was the common piston used in a WD45 gas tractor with a 6:50:1 compression ratio. The original power crater piston originated in 1953 and who knows whats in some of these old engines today. It's also nice to compare against all the aftermarket pistons avalible today. For instance Brand X offers a piston kit they say for the wd45, D17, 170, & 175 gas engines under one part number. Chances are the guy with the 175 engine may get a piston with a 2.390" or 2.500" compression height instead of the 2.645" height he had originally and now his newly overhauled engine cranks out only 49 or 50 horse instead of the original 61 horses. Brand X choose not to offer a piston with that height based on the fact that only a few thousand of that engine was ever made in fact I'm unaware of any aftermarket piston for the 175 gasoline engine, if their is please post it. Please let me know if you guys see any errors so we can correct. Knowledge is power!

I will put this in a safe place for a rainy day.

So if I'm looking at your chart right, I can put 170 or EIII pistons in a WD45 without doing block work to it is that right?

Don

the 45 blocks are so prone to cracks at the top and the raised compression will increase the exhaust tempeatures a bit, and the cranking compression will be more so those old 6-volt starters will get a work out.  I'm sure that all of these pistons are readily available at AGCO today. I'm going to get a current price on the 170 pistons vs. the relatively rare

D17 propane/175 pistons tomorrow.

 Bob the bad news is the high altitude piston have been discontinued by the manufacturer. It really wasn't a high altitude piston anyway but it was a very

decend kit at an excellent price. The pistons were made by Clevite heavy division

of what is owned by Mahle, a German automotive giant.  The piston had a 2.527

compression height or about a little more than the 7:25:1 "M" code A-C piston.

Isn't that the first thing the German's did with the Allis plant, discontinue all the good stuff? I also did some current looking into the AGCO sleeve kits and man do they have that messed up in my opinion.

Does that mean anything or did someone just have an extra sticker and use it.

Scare sticker so to speak.

New here and trying to learn.