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The quick way to find out if a problem exists with the outboard planetary assembly is to jack up that side and rotate the tire and push side ways to see if it will wobble and where the nois comes from. I have a MF-50 industrial which is the industrial version of the Ag 165. The planetary has its own lubrication. There should be a pipe plug on the inboard flange on the side facing the front. Bearing pre-load is very important, because the axle stub is only about 8 inches long. My tractor had about 10K hours and was used extremely hard with about a 2000# ballast in the rear and an extended boom for loading. After I had adjusted the pre-load to get about .010 inch compression on the bearings, I discovered that the axle spline was worn in the female housing of the planetary. It wobbled so bad that the seal wouldn't keep in the oil. All of them have inboard brakes, as Bill mentioned the later versions had wet brakes and the earlier versions had dry brakes. Mine is an early version. In addition to rebuilding the engine, the front axle bushings, spindle bushings, and bearings were worn through the bearing materials. I had to reconstuct a lot of surfaces at the bearing locations. Remarkably, the Perkins AD-204 had been started with ether too many times and not one compression ring was in one piece. Otherwise the engine showed very little wear as compared to the rest of the tractor. Good luck. Ken McWilliams
Dayton, OH
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