The tubes are in the transmission area. If the pressure tube has a hole in it the pump will fill the transmission case with hydraulic oil. The tubes are no longer available but there are fixes some have done that will work.
On each end of the tube there is a O ring. These O rings stop leaks where the hydraulic manifold mounts and where the transmission mounts to the center housing.
So if you pressurize the tube and get air bubbles in the transmission the tubes are bad.
If you pressurize the tube and get air bubbles where the two cases mount together the O ring is bad.
If you pressurize the tube and get air bubbles in the center housing (hydraulic housing) the relief valve is most likely the 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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