4630 PTO seal leaking

[hayes49]

I have a Ford 4630 that's had the PTO seal replaced 3 different times over about 15 years with each time the same results. Leak does not go away completely. Instead it turns into a real slow seep which gets worse over time till its back leaking. One time I even had a retired mechanic who had more than 30 years of working at a Ford/Massey Ferguson dealership to install it for me thinking that maybe I'm doing something wrong. He had the same results. I'll inspect the shaft this time better to see if it's bent or anything doesn't look right. If it's okay will a speedy seal help me out? Never have used one. Any advise would be greatly appreciated because I'm fixing to replace it again because the leak is every 3 seconds now. Thanks again

 

[Bern]

I think I'd be checking to see if you have a plugged vent in the rear axle. The top bolt that holds the draft spring retainer in place should
have a small hole drilled through it. Make sure that bolt is present, and that the hole is clear.

 

[SkipperII]

Speedi sleeves are very effective, if you have a worn seal surface. But as Bern says, you might have a plugged vent.

 

[hayes49]

...Okay I have actually two of these bolts. Never new anything about them. One was fairly clean the other was stopped up. Cleaned out both and reinstalled. Top bolt doesn't have vent maybe due to you'd have to remove seat to remove it. Only vent I ever knew about was at gearshift fill plug. Thanks Bern

 

[hayes49]

Other side

 

[Bern]

Interesting that you had two of them. Parts book only shows one. Regardless, you had one plugged and now it's open. Hope that helps, although
I'm not gonna hold my breath since the other one was open.

By the way, the breather near the dipstick is for the transmission. It is a separate compartment, so that breather does not vent the rear
axle.

 

[hayes49]

Yell I'm not sure if I resolved anything with cleaning the vents out other than it needed doing. There was minor oil and trash in the one when I stuck a piece of wire in it and I think it was able to vent. Not sure. Going to pull the shaft out tomorrow and take with me to dealership to let them see what they think. Thanks again for the help.