There is technical bulletin from Komatsu, AT20400. It's about replacing the bearings with an improved version from 720-2M-13611 to 720-2M-04410. Does anyone have experienced with the new part ? I bought this dozer after it had been fixed for this problem once. I did not burn one tank of fuel and it broke again. Probably the mechanic before me did not clean all the hydraulics. I found bearings in the hydraulic tank and also what appears to be a broken seal spring. I don't know if I should change the whole pump or try the new parts ?
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