Crank Driven Hydraulic Pump Oil

Bill VA

Well-known Member
I have a MF50 with a 100 loader and it has a hydraulic pump that is front mounted and driven off the crank on the engine. Manual says Type A fluid which I gather Dextron III is a replacement.

This loader would have been similar/same as a Davis loader which was used on other tractors (why I’m posting here).

Since the reservoir is separate from the tractors hydraulics, what are my options?

Are these front pumps more tolerant of other hydraulic oils? I have what amounts to Massey Permatran oil I’d like to use-up in this loader for an oil change. It is a 10-30W oil. I use this particular oil in my 1105 MF transmission. Any reason you can think of not to use it in the loader?

Thoughts?

Thanks!
Bill
 
I have a MF50 with a 100 loader and it has a hydraulic pump that is front mounted and driven off the crank on the engine. Manual says Type A fluid which I gather Dextron III is a replacement.

This loader would have been similar/same as a Davis loader which was used on other tractors (why I’m posting here).

Since the reservoir is separate from the tractors hydraulics, what are my options?

Are these front pumps more tolerant of other hydraulic oils? I have what amounts to Massey Permatran oil I’d like to use-up in this loader for an oil change. It is a 10-30W oil. I use this particular oil in my 1105 MF transmission. Any reason you can think of not to use it in the loader?

Thoughts?

Thanks!
Bill
Go ahead and use it, it will be fine.
 
Cold weather performance AKA below freezing may not be quite as good. I would use it.

Type A was recommended as a common low viscosity hydraulic oil at that point in time. Most of those old hydraulic systems are not that fussy about the oil they need, the viscosity being the most important matter. Too thick and they are slow or cavitate the pump when cold. Too thin and they are slow or have foaming issues when hot.

Both ATF and hydraulic transmission fluid have additives in them for the wet clutches and brakes found in more modern/complicated machinery.
 
I apologize if I am 'hijacking' this thread. I see the OP has his answer :) I am looking for suggestions regarding a Davis / Mid-Western Industries Model 100 front end loader. I have a 1957 Ford 860. Last weekend the loader stopped 'lifting' when under load. I have sparks coming out from under the PTO on the front where the shaft is joined to the pump. I have taken the connection apart where the shaft protruding from the front connects to the shaft from the hydraulic pump, re-seated and re-tightened everything, but the issue persists. I hear a clicking and see sparks. I conclude that something is worn out after 70 years. My next move is to remove the Davis so that I can pull out the shaft protruding from the front PTO to see if it is worn. I consider that to be the 'good option'. If I can't buy a replacement, I can make one. Has anyone encountered this before?
 
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