Ford NAA Help

[jim warehime]

I've always been a farmal guy, I have a
golden jubilee that was my grandfathers
that I recieved after his death.tge tractor
was running but has sat for a few years,
when I last used it known problems that I
am ready to fix are, worn rear axle
bearings. Right side lower 3pt stud has
been loose for decades so I'm guessing axle
housing is probably damaged from wear. No
parking brakes, sloppy front are pivot pin.
The front end seems easy enough to repair,
any insight on what to expect or helpful
tips on repair rear end issues? I need to
get this tractor usable for rotary mowing
and other light work maintaining property
where my larger tractors and zero turn are
not applicable. Thanks Jim.

 

[Jim L WA]

Hi Jim, Is it the axle bearings or the hub that's loose on the axle splines? That loose pin (draft link pivot pin) that's loose is held in by a nut on the inside. You have to remove the differential ring gear to get at it. You say there is no parking break. Do you mean the parts are missing or they just don't work?
I would suggest you order a copy of the Master Parts Catalog and the I&T FO-19 shop manual for starters. They are available on this site.

 

[jim warehime]

I already have the IT manual and am waiting
on the parts catalog. I will check the hubs
to see if loose on shaft, if so can they be
tightened or will they most likely need
replaced? As for parking brake the tractor
never had them in my 37 years of being
around it on the farm, not sure if there is
anything missing or not. Can't find any
good close up photos of a complete tractor.
Can the entire right axle tube assembly be
removed to access 3pt stud?

 

[Ultradog MN]

Usually you remove the Left trumpet, then remove the differential - it just pulls out in one big chunk. Then you can access those lower pins on Both sides.
But if yours has been loose for many years it has likely wallowed out the tapered hole.
So you will probably want to pull the Right side as you may need to replace the trumpet.

 

[jim warehime]

I figured that casting would need replaced, are they interchangeable with other models or sticky naa/jubilee? How do the parking brakes actually work on these tractors. Trying to figure out if I'm missing any peices.

 

[Ultradog MN]

Can't help you there.
I just know that getting to that lower right side pin is basically the same procedure on all the under 40 hp Fords from 1939 till 1983.

 

[Jimmyjack]

Fords had brakes? LOL

 

[Hobo,NC]

A NAA is a basically a N a boat load of parts interchange a NAA is about 3/4" longer with a OHV engine. The length may make some parts from the trans back a little longer.

I don't know if the axle trumpets interchange with out looking at the parts book... If they did they would have to come off a 1950- 1/2 N up...

If you did not have to do any brake/seal work the trumpet comes off as an asy : ) I use a engine crane and a engine leveler its a basic EZ job.

One more thang a new pin may have a different size retainer nut : ( that don't come with it... Make sure of that if you order one you don't find those nuts EZ. I save them all I spec I have a box that weighs 50lbs of them so never had to search for one.

A castellated nut, sometimes referred to as a castle nut, is a nut with slots (notches) cut into one end. ... Both castellated and slotted nuts are designed to use a pin (usually a cotter pin) that fits through the slots and through a hole in the screw to which the nut is attached.

This post was edited by Hobo,NC on 01/09/2022 at 07:23 am.

 

[jim warehime]

Thanks for the response, how do the parking
brakes actually engage? I looked at my
tractor it has the little lever looking
things on the linkage but I can't figure
out how it works, leads me to believe
something is missing.

 

[flembo]

I have 2 8ns both 48s I replaced brakes and seals on both, one of them will stop on a dime and I can lock them up for tight turns in either direction, the other is like you joke about I have to stand on them to get any brake action, an forget using them to help turn. My 2n is the same way very little brake.

 

[Hobo,NC]

Its something along this line a mechanical lock (leaver and paw)
You physically apply it by hand.


https://www.yesterdaystractors.com/cgi-bin/viewit.cgi?bd=nboard&th=868194

 

[jim warehime]

Ok this makes sense now, those seraded
plates are missing on my tractor

 

[Jim L WA]

Looking at my parts manual, it indicates that the axle housings are not the same as an 8N. It lists the 8N as part no. 8N 4010-B for the right side trumpet and the NAA as NAA 4010-B.

 

[jim warehime]

Ok thank you, hopefully my parts book will
be here in a few days.

 

[Hobo,NC]

(quoted from post at 00:18:49 01/10/22) Looking at my parts manual, it indicates that the axle housings are not the same as an 8N. It lists the 8N as part no. 8N 4010-B for the right side trumpet and the NAA as NAA 4010-B.

Maybe so I would have to see it... That's not gonna happen...

 

[FarmerHR]

While redoing our NAA, discovered that the right anchor pin could be turned easily by hand. Pulled the axle and associated parts and then unbolted the trumpet. It came off with no problems. Much to my surprise, the cotter pin was still present through the nut and pin. After removing the nut, slide the pin out. It really did not show any wear. Also the tapper hole in the trumpet did not seem to be worn. I cleaned everything up and reassembled the pin in the hosing using some locktight. Tightened the nut really tight then installed a new cotter pin. Every thing seems to be fine but have not used the tractor much.
How the pin came loose is hard for me to understand. The rotational force is not great. I have wondered if it was not tightened properly during assenbly at the factrory ?
Hope this helps !