locked gears on D 14

GeorgeNYS · Sep 10, 2016

I have a D 14 AC '57 or '58. it locked gears while in 4th gear full throttle going down hill with a load. It came to a dead stop but nobody was hurt. After some moving around with the shifting lever, the gears freed up and everything seemed normal and the tractor was driven home. needless to say, very careful. However, there was noise from the transmission, like gears rubbing against each other. The tranny has been redone after it repeatedly jumped out of third gear, a well known fact of this, otherwise very snappy little tractor.
Any suggestion what I should do to fix this problem. Any help would be appreciated.

George

DrAllis · Sep 10, 2016

Sounds to me like the transmission was very low on oil and the pinion bearing locked up and then cooled off. Remove the dipstick, wipe it off and recheck the oil on a level surface with the engine shut off.. You say you drove it home slowly and carefully. What gear were you able to drive it in?? If you say you were able to drive it in neutral, that is a very bad thing.

Gary(VA) · Sep 11, 2016

George,
Sorry to hear about your tractor. I've got a good trans and reared with axles. If you end up needing any parts let me know.

Traditional Farmer · Sep 11, 2016

Are you able to get it in all gears now or just some?

GeorgeNYS · Sep 11, 2016

Thanks for the replies. A little more info. The ser.# is 22056, which makes it a 1960. The oil level is fine. It went in all the gears afterwards and it was driven home in 4th gear. Our son who drove it home thinks it could be a shifting fork problem or maybe a detent problem. Any other ideas?
George

Bob Bancroft · Sep 11, 2016

The only time I have heard of a similar styled tractor locking up like that, it was the pinion bearing.

If the trans. was in two gears at once, it would certainly lock it up. But I can't see how that could happen on the go, without tearing things all to pieces.

I don't recall working on that type of side shifter, but I assume it's built like the others, in that there are interlocking pins/balls that won't let it in two gears at the same time. You could pull the shifter lever, and the cover, and check it out.

DrAllis · Sep 11, 2016

The shift cover has interlock pins, yes, so there shouldn't be any way to be in two gears at once, especially when already rolling down the road. Something about this story isn't right. How many hours have been put on the unit since the transmission was overhauled?? and has it ever been roaded at this speed and distance since the trans overhaul??????

Hlmillus · Sep 18, 2016

My D14 and my 615 both did that exact thing except that they both were seized into 1st gear while in 4th. I had to shift into the 1st gear position and drive back home all the way in low. I took them both apart to find that the 1st gear on the driven shaft or pinion shaft had seized onto the sleeve inside them which locked them into gear even though the sliding dogged collar was not engaged. I was able to hone the ID of the gear and polish the OD of the sleeve and put them back together. It was a big job of coarse. Get a parts breakdown of the transmission and maybe you will see what I am referring to.

GeorgeNYS · Sep 18, 2016

Thanks HImillus, and all the others, for sharing your stories about locked gears on similar tractors and what you have done or suggest I should do fix the problem. I do have a parts manual and will take a look at it if what you are suggesting could be the problem. To get to those gears I would have to split the tractor in two places to get the transmission out. We have done it before but needless to say it is a lot of work. I like to avoid that and be able to fix it with just taking the side cover off but maybe that is not possible. Thanks again for your help.

George,

Hlmillus · Sep 19, 2016

I think the gears, sleeves and dogged collars are on the input shaft, not the pinion shaft. I am not looking at the book as I post this.

DrAllis · Sep 19, 2016

All that stuff is on the bottom (pinion) shaft. The top shaft (main) is all splined gears.

DrAllis · Sep 19, 2016

You've never answered my question.........after the bad thing happened, you drove it home. WHAT GEAR DID YOU DRIVE IT HOME IN?? AND IS THERE A REAL NEUTRAL NOW?? ENGINE RUNNING HAND CLUTCH FULL FORWARD AND TRANS IN NEUTRAL.....IS IT IN NEUTRAL?? OR NOT.?

GeorgeNYS · Sep 24, 2016

I had to look up my notes to see what was done on the transmission in question. Some gears were replaced, I assume 2nd and 3rd. or reverse. It did not jump out as easy as before but still not right and it seems it did not want to engage all the way in 3rd. We suspected a bent shift fork and replaced it with a used one from Sandy Lake Equipment. In the manual it is number 58 fig 114 pg 56. This seamed to work fine until we took it on the road in 4th gear, first going to a parade (empty) and a while later with a load, when it locked up. Both times we were able to get it unlocked and drive home in 4th gear but with half throttle and slower speed. It will go in all the gears and there is a real neutral and the hand clutch works like it should, but there is a noise inside sounding like gears to close together. There are not many hours on the overhauled transmission and the fork replacement. DrAllis and HLmillus, I hope I have answered all your questions and maybe this gives you and the others who have posted, some additional ideas how to solve this problem.

Thanks so much

George

Hlmillus · Sep 25, 2016

I had just gone through the transmission on my 615 prior to the occurrance of the seize up that I wrote about. The 615 has the same transmission as the D14 but with no reverse as it has a shuttle system which will reverse in any of the 4 gears. I can imagine that since all 4 sets of gears are spinning all the time due to that fact that they are always meshed, when traveling in 4th, the 1st set are probably turning quite fast and one of them is riding on that hardened steel sleeve or collar. I can imagine that a certain amount of heat can build up and can lead to a galling situation at any time. Mine galled totally on both tractors but yours may have only started to gall and then got more lube when you stopped. If that is the case, it will continue to gall at another time until it locks up. Maybe yours is some other problem but I am just relaying my experiences. Please post your findings when possible because I am interested. Thanks, Harold Miller

Hlmillus · Sep 25, 2016

You state that there is now a noise coming from the transmission. I suggest that you shift into 1st and listen for that noise. If you hear no noise, that would make me think that the noise is due to a slightly galled sleeve. If there is still a noise in 1st, that would make me think that it is some entirely different problem. Splitting those tractors is not fun!

locked gears on D 14

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