3720 front axle leak

KennedyDiesel · Mar 7, 2010

Got done in the woods today and loaded up on the trailer. I have oil running out on the outside of the wheel. Couldn't really see where it is coming from, but I assume it's the hub seal and it's running down the back side of the rim then flowing through the slot. I seem to recall some talk of this happening to some of their 3000-20's some time back.

For those who have had this happen is there a CR seal part number or Deere only? Realtively simple job?

Pack Rat · Mar 7, 2010

Replaced the left front seal on my 3320 about a month ago. Fairly easy fix, I bought the seal from my local dealer and replaced the bearings that I purchased from my local bearing distributor. Seems to have solved the problem, I've put about 30 hours with no sign of leakage. Good luck, Where in Wisc ? I graduated from hs in Hayward, only lived there for my senior year.

jsboening · Mar 8, 2010

I've had both mine done at th dealer under warranty. I have a feeling this is going to be an issue with this tractor.

TCowner · Mar 8, 2010

I had both done on my 4720 last fall. My dealer tells me he has done several.

jsboening · Mar 8, 2010

I was told dirt gets in there and distroys the seal. Great, I can't use my tractor in the dirt.:thumbsup:

jimgerken · Mar 8, 2010

My 3720 did it the first week it was delivered (left front axle leaked). It took me months to get it back to the dealer for warrantee service because I was so busy using it everyday, so I kept refilling. It went thru five quarts of oil in a few months. I spoke with the service tech, he told me he replaced the seal and found there was something machined slightly wrong, which he corrected. I couldnt get any more detail than that description. It hasn't leaked now in months and a hundred hours. The other side has never leaked.

KennedyDiesel · Mar 8, 2010

I'm well across 500hrs and have been in a LOT of crap with it. Based on what I have read here I was surprised it went this long. Looks like I'll have to order thru the dealer but I'll try to get a seal part number off the original or the replacement when I get it in hand. I don't have the luxury of being able to take it down and wait for parts as I use it to unload the occasional freight shipment plus I have a feeling we'll get hammered with a big wet snow fall on top of our soft ground as the frost leaves. This winter was far too easy on us and it's going to be in like a lamb out like a lion this year...

jsboening · Mar 8, 2010

Let us know how it goes. I will be doing my own after my warranty is up.

KennedyDiesel · Mar 8, 2010

Looking at the parts drawing I'm assuming this is the first seal at the hub that fails and not one of the knuckle seals?

Looks like a guy has to remove the housing and release the stub axle from inside via snap ring.