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51 M touch-o-matic

S

snow fighter

New User
My TOM appears to be leaking fluid and acting sluggishly lately.
Its a late model unit; M-SN 49144

Any reasonable remedies for this, seals bad and need to be replaced kind of thing.
Any repair kits still available ?
Snows coming !

Much obliged.......
 
The soft parts are still available from Deere. You should have a Deere service manual before you start. You could probably get by with just changing the oil. 30wt or even 20wt non detergent oil makes a big difference in how well these old lifts work.
 
Where is it leaking from? Like M-Man said Deere still carries the seals, gaskets, etc. The proper oil helps out. I flushed my MT with some kerosene when I put new oil in and that helped as well.
 
I have changed the oil and it has 3 qts of30wt non detergent in it.
Still acting sluggish and slow, but it will lift
my moldboard plow.
I'll have to investigate some more see if i can determine where its leaking.
 
Check your engine oil and see if there is too much in there. If there is that means the lift pump is leaking oil back into the engine. My MT started acting funny and I found a lot of oil in the engine. There is a seal between the pump and engine and if it's original its a 60 year old leather seal so it may have let go on you.
 
The Hydro pump on the M is of an old design. The back of the two gears that form the pump and the back of the casting form most of the seal.As the 60 + year old gets some age on it, you may need to redo the "lap" finish which forms most of the seal. You may then use a more modern oil seal. The one problem which may develop is leaking into the oil pan. This is not good as I use 10 wt. hydro oil. To solve this, I drilled two wholes in the casting and installed a bypass pipe from the high side to the low side. This creates a vacuum on on the low side and no more leaking. I now have a more modern system in which I can use 10 wt. oil and have good lift even at -20 F. Good luck Ed
 
Thanks for all the info,
So cleaned up around the valve housing and ran the tractor some ,up/down with the moldboard plow on a few times, not seeing anything much for leakage around the cylinder housing.there was one drop of fresh oil at the forward hydraulic line at the housing but seemed minor to me.
Is there any way to troubleshoot this lift system
to narrow the problem down any ? It hesitates before lifting and lifts slowly.
Looking over the IT service manual seems the pump section would be easier to investigate than the cylinder housing.
Question is would the pump possibly be causing the problem and if so what would it likely be?
 
Your problem won't be in the pump. The only time it's there is when the seal go's and the oil ends up in the engine oil pan.

There are test procedure's in the Deere service manual but you have to be very carefull when using them & you only have a 30 second window so I woulden't advise most of them to other folks.

To me the easyiest test is just pull off the oil breather and look at the oil flow while she's running and working the lift. If there's air bubbles you most likely have a line connection sucking air. (big line) You know you have a drip at one so you should fix it and check (tighten) every connection (both lines) on the tractor. If there are no air bubbles you are gonna have to pull the lift and go through it.
 

Nevermind, i found a small leak at line coupling connecting to pump, took it apart .cleaned it up and seems to be working like it was previously.
Now if i could just quiet the lines down. With the bonnet off its quiet as a mouse, put the bonnet back on and it groans , tried a few things but haven't found the right remedy yet, but its better..............
 

There does seem to be an issue with it foaming over at the breather cap , is that a sucking air issue ?

Thanks for the input .
 
Glad to hear it. Seems like there is alway's some line vibration & the heavier oil makes it a little worse. Are you calling the breather cap a bonnet? Have you cleaned it so it can breathe?
 
calling the hood the bonnet, breather cap seems to be breathing OK.
Thanks for all the input.
I've got a better idea what to look for in the future plus getting to know all the components
and how it works, hydraulics greenhorn .
 
I have a '51 M that I've had a similar problem with - it used to foam and overflow at the cap. I found someone had put engine oil in it (not sure what's called for), so I put one of the lower pressure rated hydraulic oils in it and the frothing went away. It was acting like diesel fuel when it comes out of the pump - frothing on de-pressurization. Some oils do that which is the reason for a hydraulic rated oil - it's made to be pressurized and decompressed. RonMC
 
(quoted from post at 01:19:44 10/27/12) I have a '51 M that I've had a similar problem with - it used to foam and overflow at the cap. I found someone had put engine oil in it (not sure what's called for), so I put one of the lower pressure rated hydraulic oils in it and the frothing went away. It was acting like diesel fuel when it comes out of the pump - frothing on de-pressurization. Some oils do that which is the reason for a hydraulic rated oil - it's made to be pressurized and decompressed. RonMC
Click to expand...

It does call for non detergent 10 wt motor oil according to my newly arrived service manual, Should have bought this a long time ago.
I'm thinking i need something different for winter snow plowing, got 30 wt non detergent in it now, any suggestions ?
10 wt non detergent or similar weight hydraulic fluid. ? Nothing leaking into the oil pan at this time.
 
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