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Minneapolis Moline Tractors Discussion Forum
:

MM M5 HYDRAULIC SYSTEM

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lenray

11-24-2019 14:29:50




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How do I tell if I have the --type --E--lifts or the TEL-O-FLO LIFTS on my MM M5 maybe a 1961 or 1962 year tractor....




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molinegb

11-24-2019 14:51:45




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 Re: MM M5 HYDRAULIC SYSTEM in reply to lenray, 11-24-2019 14:29:50  
3 different hydraulics used on M5. Two types of Teleflo early and late. First type used in 1960. E type has big reservoir under seat.Teleflo is mainly for 3 point and is a cast system with filter on front. E has no filter.



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lenray

11-24-2019 15:08:02




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 Re: MM M5 HYDRAULIC SYSTEM in reply to molinegb, 11-24-2019 14:51:45  
OK thank you molinegb-----I have the owners manual and my guess was that I had the TEL-O-FLO..............You said there was an early one and a later one--anyway I can tell if I have the early or later one. thanks len in michigan



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JK2

11-24-2019 16:30:36




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 Re: MM M5 HYDRAULIC SYSTEM in reply to lenray, 11-24-2019 15:08:02  
If it has 3 point hitch, it is a tel-e-flo. The early ones have the oil passages internal to the rear end and reservoir. They also have an all cast iron pump with only one hyd line connected to it for the power steering. The early system has only a small filter to the right of the lift cylinder.

The later system uses a pump that has aluminum front and back with an iron center plate. They also have a large ~1" inlet tube that goes from a canister type filter under the left side of the seat to the pump as well as a line that goes along the right side of the system to the front of the reservoir to supply oil under pressure to the unit. It will also have a smaller line that goes to the power steering.

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lenray

11-25-2019 18:10:51




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 Re: MM M5 HYDRAULIC SYSTEM in reply to JK2, 11-24-2019 16:30:36  
Thank you fellas---JK2 I have the early version of the hyd. system. The pump bolts above the PTO . When I removed the pump the oil that came out was from the reservoir for the rear end--is that correct. The pump is not using that oil--is that correct??? The reservoir for the hyd. system is above the pump and kind of under the seat area--is that also correct. My early hyd. pump is leaking oil into the rear end. I am installing a rebuild kit hoping to stop the leaking.
Just to be clear on my part--the hyd. pump bolts to the rear end but is not using the rear end oil, but oil above the rear end in the hyd. reservoir. Thanks to you two guys for your help. len in michigan

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JK2

11-25-2019 20:23:30




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 Re: MM M5 HYDRAULIC SYSTEM in reply to lenray, 11-25-2019 18:10:51  
The oil level for the rear end and transmission should not be near as high as the pump but if it is you need to drain it down. If it is that high it would have come out the large hole where the drive connects to the pump. The rear end should have ~90wt in it. The hyd system uses 10wt hyd oil or automatic trans fluid. The three places that hyd oil commonly leak into the rear end is (1) the pump seal, (2) the o-rings on the pressure tube that is between the rear end housing and the reservoir or (3) the thick square rubber ring with the short steel tube in it that feeds the pump oil from the reservoir. You will have to lift the reservoir off the tractor to check or replace the last two. If you have to do that check the PTO clutch adjustment while you have it off.

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lenray

11-26-2019 18:59:17




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 Re: MM M5 HYDRAULIC SYSTEM in reply to JK2, 11-25-2019 20:23:30  
JK2 I have a leak and am replacing the seal in the pump and some damaged O rings in the pump. I hope it isn't the other two that you mentioned...thanks for your great information......



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molinegb

11-27-2019 09:35:02




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 Re: MM M5 HYDRAULIC SYSTEM in reply to lenray, 11-26-2019 18:59:17  
Change Torrington bearings as well as E rings. I redid my M5 pump as had bronen shaft. Only achieved 5-600 psi. Changed bearings and got 1200 psi.



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