Ford 1210 differential lock

[tree grower]

The diff lock on my 1210 has not worked for a couple years. I am sure the reason is that I engaged it (stomped on it) several times when it was going too fast. This summer the tractor was in the shop for other repairs, and I asked them to fix the lock while they had it. The repair was noted on the work order, but there is no evidence they took the top off the diff. I presume they just adjusted it by tweeking the stop bolt on the floor pan. Anyway, it still doesn't work. There is no strange noise in the diff, and everything works and sounds just fine, except the lock doesn't work.

In studying the schematic in the repair manual, I am guessing that a cotter pin or roll pin let go on the internal mechanism (parts 8-15, Fig. 222 in the I&T manual). Any other thoughts?

 

[paratrooper]

I would have to ask if you have used it before . On my tractor the lock disengages when I push in on the clutch . I've always thought of this as a "one time" use to get traction to get out of sand or something . I really don't think that it is designed to stay activated for any length of time . I push the clutch , put it in gear , activate the lock and release the clutch . After I'm back on solid ground I shift to the next gear and the lock releases at the same time . Good luck .

 

[NewportNic]

I agree with paratrooper... My 1210 is a hydro, and the diff-lock releases as soon as there is no pressure to move (forward or reverse).

 

[tree grower]

You guys are correct- the lock works the same on all my tractors. Step on it and it engages. If torque is maintained, the lock stays in, but push in clutch or let up on the gas and it disengages by itself. Keep my heel on it and it stays in. My problem now is that when I step on it it does not engage. On icy ground, if engaged both rear wheels should turn. Bump up to a big tree, and if engaged both wheels should turn. Not the case with mine. Only one rear wheel turns as in normal differential action. If wheels are turning at all, engagement should be felt in my foot, but that doesn't happen