Super M hydraulic/transmission question

Jaybird2 · Jul 1, 2008

I think I blew a seal on my belly pump. I"m guessing the hydraulic pump hadn"t been used on my old Super M in many years and after about an hour of disking she was throwing hydraulic oil out from the inspection cover area. I confirmed it wasn"t engine oil so I am confident I can get her home engine wise. My question is whether or not I have anything to worry about with regards to the transmission after having lost an unknown quantity of oil. I know I didn"t loose 13 gallons of hy-trans but I just thought I"d ask you guys if you would drive it 2 miles back under these conditions?

Thanks - J

Bob M · Jul 1, 2008

J - Is it hydaulic oil or tranny lube that's leaking out from the inspection cover?

My guess it's leaking tranny oil out of the transmission front seal - or both front seals if your SM has a belly pump.

Fortunately the seals are inexpensive. And they can be replaced from underneath without splitting the tractor.

The transmission holds a LOT of oil (13+ gallons). Once the lube level falls below the countershaft gears the rate of leakage should slow way down. The bull gears running in the large "sump" at the rear of transmission should still throw up enough oil to keep it adequately lubed for a 2 mile ride home.

rustyfarmall · Jul 1, 2008

The belly pump is completely seperate from the transmission and do not share any oil, so you will do no damage to the trans. But, if the belly pump is completely empty and dry of oil, there is a chance of damaging the belly pump. Just pour a quart or two of oil into the belly pump and bring 'er home.

BOBM25 · Jul 1, 2008

These older farmalls don't use hytran like the newer ones do. The trans and differential use a gear lube like 80-90w. The belly pump is separate hydraulic oil. Bob is right. The trans/differential holds a lot of oil. A small leak wouldn't hurt much there. The belly pump wouldn't have to lose much to make your hydraulics inoperable. So the leak may be your front transmission seal if your disk still goes up and down ok.

Bob M · Jul 1, 2008

Or instead of adding more oil to a badly leaking belly pump, simply drop the dust cover then remove the drive coupling between the transmission and belly pump. Should only require only a minute or two, and you're gonna have to take it apart anyway...

Jaybird2 · Jul 1, 2008

OK, that's as I suspected then but didn't know for sure. I lost pressure at the cylinder and then noticed the leakage below. Cleaned it all off and took a peak inside with it running so I could more or less eliminate the front transmission or rear engine seals. I just didn't know if it "shared" the oil or not since I had never been in there before.

Thanks very much for your help guys. - jay

Owen Aaland · Jul 1, 2008

(quoted from post at 09:31:55 07/01/08) Or instead of adding more oil to a badly leaking belly pump, simply drop the dust cover then remove the drive coupling between the transmission and belly pump. Should only require only a minute or two, and you're gonna have to take it apart anyway...

The coupler on an M will not come out without dropping the Lift-All pump. The H's have a coupler with sleeves and cotter pins. The M's use a short coupler with drive lugs at right angles that can only be removed when the pump is removed .

Fixer · Jul 1, 2008

My 47 M has a nine speed by Heisler. Has a lever to take the belly pump out of gear. Handy feature. Just thinking Bernie STeffen

Bob M · Jul 1, 2008

Indeed...

I was thinking of an H (sleeve and cotter pins) when I wrote that. Thanks for the correction!

Super M hydraulic/transmission question

Jaybird2

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Bob M

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rustyfarmall

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BOBM25

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Bob M

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Jaybird2

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Owen Aaland

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Fixer

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Bob M

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