Selecto speed disconnect

wink4000 · Sep 11, 2017

Hey folks!
I have a 1968 ford 4000... Thanks to lots of help from this website and a lot of grunting and grinding I fixed a steering system problem and was running the tractor for the first
time since June. Got a good amount of work done and then I heard a slight grinding of gears, then the tractor wouldn't move- all gears -Forward and reverse and the PTO wont
turn. Engine runs great. Fearing the worst I came indoors to research my problem.. Hopefully not as bad as I thought, according to my (quick) research, the torque limiting
clutch is sheared. This seems accurate because of the way the disc (and shaft) looked in April when I had it split - rusted, but not worn out, I elected not to replace the $250 part.
If you guys have another diagnosis I am all ears!

Besides that problem, my issue is where the tractor broke down.. In my driveway where I cannot pass on either side. And it seems to be in park/ gear and I cannot switch to
neutral to tow it. Is there any way to disconnect transmission, or somehow switch it to neutral to make the experience of pulling this thing easier?

Bern · Sep 11, 2017

Look for lever number 75 in the drawing linked below. It is located near the floorboard. This will disconnect the tranny from the rear axle.
Disconnect lever

wink4000 · Sep 11, 2017

You're the man.

Sean in PA · Sep 11, 2017

The S-O-S transmission defaults to Park when the input shaft isn't spinning, like when the engine is off or when the torque limiting clutch has broken as you suspect, or when the splines on the input shaft get stripped, which is another possibility since you said you heard a noise like gears grinding.

Bern pointed you to the proper part drawing for the traction disconnect handle. It is on the right side of the tractor toward the rear of the tractor from the 3 point touch control handle. It looks like a flat strap that has had the end rolled into a loop.

Destroked 450 · Sep 11, 2017

You may have to rock the tractor back and forth to get the lever to move, but be careful if it's on a incline, once it disconnects the tractor while roll away.

wink4000 · Sep 11, 2017

If the splines are stripped is that fixable? or should I just bury her? I've read that spline piece is hard to find.. let alone install.

Sean in PA · Sep 11, 2017

(quoted from post at 21:00:12 09/11/17) If the splines are stripped is that fixable? or should I just bury her? I've read that spline piece is hard to find.. let alone install.

John Smith, one of the members here does a conversion on the ones that have stripped the splines. He basically cuts the end of the splined shaft down so that is a hex shaft and then cuts down a hex socket and inserts it into the TLC in place of the splined hub. Here's a link to his web site showing how he does it.

He has them already done and on hand for the pre-1965 models, but I think that he will do the same for the 1965+ models as well.

http://www.oldfordtractors.com/sosinput.htm

Selecto speed disconnect

wink4000

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Bern

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wink4000

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Sean in PA

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Destroked 450

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wink4000

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Sean in PA

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