Rear axle seal

Terry Joe · Jan 29, 2011

What do you guys normally see that causes a rear axle leak? My axle is tight, has no slop. Was wondering before I got started if I can get lucky enough to be just seals or if it will get into alot of money, kinda short on that at the moment. I also have the lift arm stud on the trumpet that is loose and leaking. Was going to repair that also when making this repair.
Thanks for any advice, there is a wealth of info on this site.

dlplost · Jan 29, 2011

over filled tranny...

Dell (WA) · Jan 29, 2011

Terry........ya gotta hepp us out here. There are 2-different styles of rear axles and therefore 2-different styles of seals. Big NUT 8N ...or... big BRAKE 9N/2N.

Most axle leaks are caused by OVERFILLED hydro-tranny oil. Simple to check and fix. Pull yer 6-o'clock bolt outta yer roundy-dipstick plate behind yer right heel and letter drain.

Surprizingly enuff, most OVERFILL is caused by WATER leaking thru the BIG compensator SPRING under yer butt-buckett. (tip: water in hydro-tranny oil turns MILKY, 'stedda' clear honey color)

Most trumpet leaks are the lower link pin. It is internally cotter-keyed by castelated nut. Torque to 150ft/lbs. Unfortunately, you gotta remove yer rear axle trumpet to tighten the internal lower link NUT. (tip: swipe yer paper trumpet gasket in HOT water to relax it so it fits over them 11-studnuts. torque studnuts to 40ft/lbs) .......Dell

John Smith8N · Jan 29, 2011

(quoted from post at 17:50:34 01/29/11) What do you guys normally see that causes a rear axle leak? My axle is tight, has no slop. Was wondering before I got started if I can get lucky enough to be just seals or if it will get into alot of money, kinda short on that at the moment. I also have the lift arm stud on the trumpet that is loose and leaking. Was going to repair that also when making this repair.
Thanks for any advice, there is a wealth of info on this site.

Rear axle seals leak because they are worn out, plain and simple.
Bad seal = oil leak
Bad seal + overfill = bigger leak
Good seal = no leak
Good seal + overfill = no leak

Terry Joe · Jan 29, 2011

Sorry. Early 8n, front mount dist. Big nut axle. I know its the seal leaking, was wondering about any expensive worn hard parts. Fluid level is actually on the add mark on the dipstick. Tractor is always inside and used weekly in the summer mowing 5 acres with 72 inch finish mower.
Thanks again guys.

souNdguy · Jan 29, 2011

i agree with the others.. seals get old, wear and leak.. if you overfill.. they leak even worse.

soundguy

DollarBill · Jan 29, 2011

[b:6dd79d1bbc]What do you guys normally see that causes a rear axle leak? My axle is tight, has no slop[/b:6dd79d1bbc].

Terry, you're in good shape if the hubs are tight. Early 8Ns have only the outer axle seal. Should be able to get these for $25. You only need to pull the left trumpet in order to tighten both lift arm pivot bolts - Trumpet gaskets are pretty cheap - Postage will likely cost more than the gasket.

After the repair, make sure you retorque the axle nut after every 10 hours until one day it won't tighten anymore - May take 3-4 times before it bottoms out.

old-9 · Jan 29, 2011

I stopped at an old tractor repair place that also sells Ford parts. ( owner used to have a Ford tractor dealership) I was after sure seals for my 9-N. They told me a customer brought his tractor in complaning of wet,oil soaked brakes.Customer had FILLED the tranny up to the fill hole! Said they took 30 gallons or more out of it. I assume the customer didnot read this board.
joe

Rear axle seal

Terry Joe

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dlplost

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Dell (WA)

Well-known Member

John Smith8N

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Terry Joe

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souNdguy

Well-known Member

DollarBill

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old-9

Well-known Member

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