Pressur checking should be first. do not go over 7psi as the top tank is designed for that pressure (this assumes the H is equipped with a pressure cap. Early ones were not! If the rad cap looks and near fits the gas tank, it is not a pressure type. The use of a pressure tester on the non pressure radiator will break the seals and ruin the radiator. If you end up pulling the head, have valve guide seals installed the price is reasonable, and it is a best practices way to assure proper oiling and no valve related oil loss/smoke. The rubber and teflon (Perfect Circle Style) is best. Umbrella seals will work, but are not permanent. Jim
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Today's Featured Article - Tractor Hydraulics - The Basics - by Curtis Von Fange. Hydraulics was one of the greatest inventions for helping man compound the work he can do. It’s amazing how a little floor jack can lift tons and tons of weight with just the flick of a handle. What’s even more amazing is that all the principals of hydraulic theory can be wrapped up in such a small package. This same package applies to any hydraulic system from the largest bulldozer to the oldest and smallest tractor. This short series will take a look at the basic layout of a simple hydraul
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