A 1915 12-25 Avery fresh off the truck from Quinter, Kansas. This tractor was never "sold" as it was used on the Avery family farm near Sterling, Kansas. Used and used up. But it is a very desirable "open governor" Avery and in spite of all the negatives there were more than a few positives. In other words we lucked out on a couple major details. The crankcase didn't require splitting to remove the crankshaft and the throws and the connecting rod bearings were really excellent
The cylinder sleeves were sleeved, I made new custom wrist pin bushings, new valve guides. I stemmed 3 valves and made one new. The radiator is almost entirely new with "rolled in" copper tubes. The angle iron braces and top stack are original. After a very disgusting episode of excessive oil consumption I am very pleased with the tractor and it runs like a Swiss watch. The oil problem was solved by the installation of oil control rings on the pistons which I was fortunate (read "creative" enough) to do without removing the pistons. There was just enough room inside the crankcase to get the job done but it was very difficult. Here's a clip of it putting out 30hp on a dyno:
Imagine this very early 20-40 Case tractor as a mostly bare frame on wheels with bent front axle bracing. That's how it arrived. I don't have a decent before pic----rats. This required a lot of work to the heads, valves (new stems again) and guides, babbitting the connecting rods, repairing about 28 radiator tubes (we sleeved them with copper), a completely new radiator top tank, lots of governor and gear shifter work and whole lot more! The cab tin and fuel tank are originals from the owner's Grandfather's 20-40 Case. Here's a video of that too: 2040 CASE VIDEO
If you have a really good eye you will identify this as an "Old Reliable" Hart Parr 30-60. This is how it arrived on the coldest, windiest, day of a long Winter. The rest of it showed up piece by piece. I even had to bore, sleeve and re-key the flywheel. I won't say how I did it but it involved an old cylinder boring machine. I mentioned before.....we can get VERY creative. Connecting rods and one main bearing half were babbitted, valves repaired, sideshaft and cross shaft made new and a WHOLE bunch more babbitting, cooler sheets were repaired and, come to think of it, there was very little that WASN'T fixed.
Here is it running on a nice Summer day. Having a displacement of 10.2 GALLONS makes it a very powerful machine. This is, as far as I know, the first production tractor to have an overhead cam. A planetary in the belt pulley gives forward and reverse movement. When the planetary is worn it has been described as sounding like "a continuous train wreck". THIS one does not fit that description....I fixed all that! The ringing of the sideshaft bevel gears can get on the nerves though. The hit & miss governing makes this tractor a real attention getter.
Video of the Hart Parr powering a sawmill here: HART PARR VIDEO
I have moved the AMERICAN PLOWMAN tractor portion to
There are more videos of this and other projects at my youtube channel