3020 - Leak from pto after eating snowblower

DeereJon

New User
After repairing a leak with my dad before he passed, the hydraulic fluid is draining again like a tapped maple. I check the fluids regularly because of the previous leak and I suspect the injury happened after a remarkably heavy snow we had in Ontario this past winter around Christmas. The stuff fell like concrete and split trees in half.

From only blowing the snow, in below freezing temps, the snowblower chewed itself apart. It snapped the chain, chewed the drive sprocket, and finally cut the roll pin on the blower, releasing the shaft. The shear bolt, despite being the right hardness, did not shear.

After repairing all that damage -and replacing the shear bolt- I noticed the fluid was WAY low, like 6L to get it on the stick, low. Traced the leak to the pto output shaft and all this happened in a rush to run the spring tooth and get the firewood in this past weekend. I was thinking about hooking up an IV to the thing to make sure it didn't run dry, that's how fast it was bleeding out.

Im traveling for the next week, helping my mom move, and would really appreciate the expertise of this forum that helped me switch out the generator to an alternator in the winter. Despite it being a 1969 JD 3020, which my dad always insisted was POS ground and so does every resource I've found, switching to NEG ground restored function to the lights and the fuel gauge! My uncle said that's the first time the gauge has ever worked.

I will do what it takes to fix this but im really hoping it's an end seal and not some deeper issue that means deep surgery.

I'll update with photos when im back next weekend, but wanted to make the introduction and get you experts puzzling over what it could be in the time being. Im obviously concerned the snowblower incident broke something more critical and im looking at major repairs, but ever the optimist, maybe it's something rubbery that has lost it's flex? I haven't even had a chance to consult the manual yet so im giving you all the information I can think of.

The only other change I've noticed is miss on a few cylinders starting up, but my dad always used to start it with ether and im trying to avoid that, so I cant say if that is new or not. It sounds like someone firing up an old WWI plane by spinning the prop when it first takes; coughing and snorting its way up to idle.

Very thankful for this community and all the wisdom it holds! Fingers, toes, and everything else, crossed it's something not too deep in the beast.

Hope you all have a great week!

My name is Adam, btw. Very pleased to make your acquaintance!
 
Are you 100% sure it is coming from the PTO output and not just running back there? That is a lot of fluid loss.

Is it only leaking when running or does it do it while parked?

Did you put a piece of clean cardboard underneath and watch it over time?

Some pics might be helpful but sometimes those PTO/hydr coupler areas are so nasty it is hard figure it out.

Let us know when you have some pics.
 
(quoted from post at 21:10:55 04/27/23) Adam,

Your dad was right. Your 3020 left the factory positive ground.

1969 3020 production started at Serial Number 123,000 and gas, LP and diesel all used 12 Volt electrical systems at that point and (-) ground alternators.

Or, am I messing something here?

And how could the battery polarity have been switched if it had an alternator from the factory.

To the O.P., what is the serial number?
 
(quoted from post at 00:10:55 04/28/23) Adam,

Your dad was right. Your 3020 left the factory positive ground.

I politely beg to disagree '69 3020 came from factory with a 12 volt system with negative battery ground
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Jim,

Your diagram shows a 24V floating setup for a diesel. Tractor Data, often wrong, shows gas and LP
3020s as 12V positive ground. Is TD wrong again in this instance?

The OP did not say whether his 3020 was gas or diesel and I took it to be gas.
 
His diagram is right the batteries shown are 6 volt, 3 caps, gas and lp only had one 12 volt battery.
 
(quoted from post at 10:42:10 04/28/23) Jim,

Your diagram shows a 24V floating setup for a diesel. Tractor Data, often wrong, shows gas and LP
3020s as 12V positive ground. Is TD wrong again in this instance?

The OP did not say whether his 3020 was gas or diesel and I took it to be gas.

Parts schematic is correct for '69-'72 diesel rowcrop. '69-'72 tractors had 12 volt negative ground with alternators.
 
(quoted from post at 17:56:44 04/28/23) Thanks to Jim, matthies, and wore out for correcting the bum info I posted. I appreciate it.

I always appreciate it when someone corrects an error in a post I made.

Who knows how long these forums will be up, someone looking for info a decade in the future willed be helped by correct info.

It sure would be nice if the O.P. would come back with the serial number and if it has an alternator or generator as several thing don't add up for it being a 19693
 

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