Hi, The hydraulic system on a 1755 is a stand alone system though there are a couple of brakes and clutches in it- IE: the pto . The other driven unit is the PS. The brakes themselves are hydraulic actuated dry disc. The final drive is run in gear oil. The 3-speed is TF (dexron/mercon). And the fresh motor takes Rottella 15-40. My mistake was presuming the farm and fleet hydraulic oil was the right grade instead of doing more research. But I agree with you about the economics lesson. I just don't believe that type 55 is necessary when a lower priced hydraulic oil could be just as good. And with today's standards compared with 35+ year old standards I was looking for a cheaper alternative. But my question was more centered on what he said about the motor oil. I know now I wasn't clear about my intentions. I had no intention of following his suggestion but after re-reading my post I see that that could have been misconstrued.
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