Posted by JDEM on March 29, 2020 at 07:48:13 from (47.33.231.52):
Here is another update on my made-in-1952 Ford NAA Jubilee. If I had known then (when the tractor was apart) what I know now, I would of kept the optional live PTO kit. I eliminated it so the tractor would drive.
Note - the Ford-Dearborn factory manual does not show parts that I found. I suspect there was a later update and I have found NO documentation for it.
My problem was - no wheel drive. Put the trans in any gear, and at first on cold start - nothing. After awhile it would start to move. Problem was caused by worn out clutch disks inside an optional Dearborn live PTO kit that was dealer-installed (according to Ford).
What is not shown in the Ford manual is a valve that can be turned by hand and it over-rides the entire system and puts into a mechanical lock-up. So even though my system was worn out - it seems if I had just turned the little lever - all would of worked as if there was NO kit installed. I did not know this. Ford did not have it when their manual was printed. I asked here and it seems nobody here knew it either.
I thought maybe my rig was an oddball, but it seems not. I have found several used PTO kits for sale and all I have seen have the same parts as mine. So I am going to assume Ford had an update at some point that I have found no documentation for.
As far as the clutch disks go? YT Tractor sells them here for a 4000 Ford. They have the correct specs to fit the NAA/Jubilee Dearborn PTO kit.
Thanks to some Chinese people, I found a great database for Ford clutch disks. I used this database to identity which disks I needed.
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