Well we're making progress - on both the seal and the engine identification.
I pulled the flywheel, dropped the oil pan, and took the crank bearing off to get the seal out. The seal had several numbers on it. I took it to a couple of really good parts places but unfortunately all the numbers were extinct. So I went online and did some searching. I was able to cross-reference some numbers and narrow it down. Interestingly, most of the manufacturers for the seal were military/govt. And I finally located the seal from a military surplus supplier.
Evidently this is a common part for the M151 army jeeps. That gave me an idea for identifying the engine. I did some searching for the engine specs in the M151 jeeps. There were a few, but the common one seemed to be Hercules. The pictures of the M151 jeep engines looked like the engine I have. I found an article from Foley Engines which stated that "the Hercules G1600 serial number is a stamped-in number located near the dipstick. It is 7 digits in length beginning with 491, 490, or 493." My engine has a 7-digit number stamped near the dipstick beginning with 493. I think I found the engine!
I also discovered that this engine was used in White tractors, and I found a picture of one and the hood looks almost identical to what's around this engine.
So at this point as best I can figure this is a Hercules G1600 out of a White tractor.
On another note I've got the seal on order. Hopefully will fix my problem.
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Today's Featured Article - Usin Your Implements: Bucket Loader - by Curtis Von Fange. Introduction: Dad was raised during the depression years of the thirties. As a kid he worked part time on a farm in Kansas doing many of the manual chores. Some of the more successful farmers of that day had a new time saving device called a tractor. It increased the farm productivity and, in general, made life easier because more work could be done with this 'mechanical beast'. My dad dreamed that some day he would have his own tractor with every implement he could get. When he rea
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