If it starts good, doesn't use over maybe a quart of oil in 10 hours I would not worry about it. The best way to check for excessive blow by is with what we call a water manometer. You hook it up to the breather pipe in conjunction with a orfice for that engine. If it reads over about 5 inches of water it is excessive. If I remember right, 28 inches of water is equivalent to 1 psi so you can see it is a very accurate pressure gauge. Not all shops have one but all IH dealers were supposed to have one. Fact is , I had one of my own and when I quit CaseIH dealer and went to work at John Deere dealer the guys there kind of liked my tool. After I retired they borrowed it once or twice and then bought their own for the shop. It is not the entire answer but along with other engine conditions it really is quite useful. Doing a compression test is quite a project and it still won't really tell you if blow by is excessive. Do realize that IH had two, (actually three) different crankcase breathers on those engines. If it has the side breather they are more prone to carry oil out with fumes. If the engine was ever overhauled and used the wide gap second ring it is a must to have the top breather as that ring does allow more blow by but actually controls oil consumption much better.
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Today's Featured Article - Tractor Profile: Earthmaster - by Staff. This tractor, manufactured by the Earthmaster Farm Equipment company in Burbank, California was made for only two years. The Model C came out in 1948 and was followed by the "CN" (narrow-width model), "CNH (narrow-width high-crop model), "CH" (high-crop), "D" and the "DH" (high-crop) in 1949. The main difference between the models was tire size, tractor width and cultivating height. The "D" series were about 20 inches wider overall than the
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