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Dana 20 rear axle used under Deere,Ariens,and others

leaking pinion

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6 replies to this topic

#1 rustyoldjunk OFFLINE  

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Posted March 04, 2016 - 07:11 PM

The Dana 20 axle was used under the late JD 140's and early 300 series,early New Holland,Ariens for decades,and other brands. I have a Dana 20 under a Roper 18T hydro that has a leaking pinion seal. Not where the hydro bolts to the rear and drives off but below that,the actual pinion. It has sat a long time. I went thru the hydro got it all back together and got the rearend and hydro back under the tractor. This evening I started to fill it with fluid and it came pouring back out around the pinion. Has anyone replaced that seal before ? Where did you get a seal ? Can it be replaced from the outside ? I don't want to pull the rearend back out again if I can help it.



#2 rustyoldjunk OFFLINE  

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Posted March 04, 2016 - 07:43 PM

Well,I think I figured it out. It is missing a soft welch plug. I should have noticed that. Now,where do I get one ?


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#3 JDBrian OFFLINE  

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Posted March 05, 2016 - 06:13 AM

I'm not sure where to find that plug. Have you checked the JD parts site to see if it is listed as a part there. Many parts are still available. You might also try Dana distributers. If you can find a dealer with an experienced parts person they might be able to get the part. That's a strong rear end. I have a JD 314 and a 317 with that setup.


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#4 crittersf1 ONLINE  

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Posted March 05, 2016 - 08:07 AM

What is the measurement on the plug?


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#5 JDBrian OFFLINE  

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Posted March 07, 2016 - 08:50 AM

Just a detail, but I believe the JD 120 also used the Dana 20 rear end. I have read that the Ariens setup is prone to breaking the welds where the Rear end mounts to the frame. Not sure if other applications have had this issue. 



#6 rustyoldjunk OFFLINE  

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Posted March 13, 2016 - 01:40 AM

Just a detail, but I believe the JD 120 also used the Dana 20 rear end. I have read that the Ariens setup is prone to breaking the welds where the Rear end mounts to the frame. Not sure if other applications have had this issue. 

That's true on both counts Brian,I did leave out the 120 and I have broken the rear mounts on a Ariens. Of course I had a 54 inch plow on the front,a 5 ft CAT.0 3 point grader on the rear loaded 10.50 ags and 100 pound wheel weights on it ! It was a pushing,grading machine though...... :D



#7 rustyoldjunk OFFLINE  

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Posted March 13, 2016 - 01:43 AM

What is the measurement on the plug?

Turns out its a 2 1/2 inch plug. I went to Deere and got one for $5.

Now the problem is no flow out of the pump. I started a thread in the hydraulics subforum.


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