1940 9N axle removed

racerjim0

Member
1940 9N right side axle removed to fix the oiled brake situation.
We found 1 of the 6 hub studs was broken. It was the one on the bottom. This may have caused the whole issue.
We found what appears to be the seal kit installed that allows you to put grease in the bearing verses the normal oil flow but there was no grease in there, just some oil which I must assume was leaking by the bell shaped seal or from the lower area due to the broke stud. The bearing and race still appear to roll smoothly and feel unharmed.
We are deciding on whether or not to remove the pressed on bearing retainer so that the outer seal can be replaced. Thinking that maybe with a new bell shaped inner seal installed along with grease in the bearings that the outer seal would no longer be an issue and save us from the headache of removing the retainer. Input wanted here.
We are trying to think of the best way to remove the retainer without harming the bearing with meal debris, if we go that route. Input wanted here.
We also only found one paper gasket on each flange during the removal. I though that was kind of strange from what I've read here. I could see no damage to the axle end. Input wanted here.
When I got to the shop, Mark had already removed the the wheel and was in the process of removing the hub/brake and axle so I didn't get a feel for existing end play.
We removed the existing 2 gaskets and did a mock up assembly without new gaskets or bell seal just to see what the end play felt like. With 4 of the 6 bolts tightened down there was no end play but the assembly rolled smoothly. I guess we should have stuck several gaskets in for the mock up so we could have a better feel of what it is going to need for gaskets.
The brake shoes looked new but oil soaked. There were still machining marks on 90% of the shoes. I guess we will try using a heat gun to see if it will wick out some oil. Input wanted here.
 
(quoted from post at 18:01:13 02/16/15)
We are deciding on whether or not to remove the pressed on bearing retainer so that the outer seal can be replaced. Thinking that maybe with a new bell shaped inner seal installed along with grease in the bearings that the outer seal would no longer be an issue and save us from the headache of removing the retainer. Input wanted here.

We are trying to think of the best way to remove the retainer without harming the bearing with meal debris, if we go that route. Input wanted here.

We also only found one paper gasket on each flange during the removal. I though that was kind of strange from what I've read here. I could see no damage to the axle end. Input wanted here.

When I got to the shop, Mark had already removed the the wheel and was in the process of removing the hub/brake and axle so I didn't get a feel for existing end play.
We removed the existing 2 gaskets and did a mock up assembly without new gaskets or bell seal just to see what the end play felt like. With 4 of the 6 bolts tightened down there was no end play but the assembly rolled smoothly. I guess we should have stuck several gaskets in for the mock up so we could have a better feel of what it is going to need for gaskets.

The brake shoes looked new but oil soaked. There were still machining marks on 90% of the shoes. I guess we will try using a heat gun to see if it will wick out some oil. Input wanted here.

I did not replace the outer seal and mine is doing fine. However, I would have some concern that the sure seal was already installed and the brakes still got oil on them. That means both leaked. So you very well may want to replace them both. Some on here say you must replace for the sure seal to work properly, to me if the sure seal works, the outer seal only has to hold the grease and tractors don't go to fast. One thing to check is the seal area on the axle. Make sure the area where the sure seal rubs is smooth, these old axles are pretty soft and the seal area can be damaged. That would let the oil by and it would dissolve the grease in no time.

I can't help on the outer removal, someone else will.

Unless you find play or have something to fix, I would replace the gaskets as they were. BTW I would also repair the broken stud.

The shoes are toast, buy new ones. You will never be able to get enough oil out of the shoes to make them useful. Once they get hot braking, more oil will come out and you will be back to square one. It is no where worth the risk.
 
After thinking on it more, I am going to assume the oil came from the bottom stud being broke.
When we pulled the axle out, no oil came out of the trumpet so that kinda tells me that the Sure seal wasn't the culprit as the seal is what, maybe 1 1/2" above the trumpets lower radius where the oil would be.
I think I'll take an inspection mirror to the shop and see if I can get a better look at the outer seal to see if it looks OK.
I'm gonna price the new shoes and go from there. I sure wish I could still get some 1,1,1 Trichloroethane.
 

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