D4 7u Drivetrain problem

You said the gear selector was unbolted when you bought it? Sounds like someone else had problems and that's as far as they got with it too. If understand you correctly you do not have the pony in a running condition and it sounds like you are trying to pull start the old girl? You may end up finding out you have no problems if you make the main engine start and things are put under power as they should be. Tough to tell much else without pulling that transmission cover off, even thought that is a heavy job it's not terrible to do if you have a means to lift it and a buddy helping you makes it easier yet.

The engine turning over with clutch disengaged and then not with it engaged does point to transmission trouble in my book. One thing to consider is even though the shifter "gates" may be lined up in neutral when you look in the top hole, the gears may be still meshed because of a broken fork etc. Also possible that you have a gear galled on a shaft from running low on oil or stationary pto use etc. I can never remember the specific recommendations about pto use. Your tractor may not have a pto on it anyway.

When you tie the steering clutches back the left track won't turn.......I am confused...does the tractor roll or not? Just the right is loose? Stuck brake on left side is a good possibility or could be stuck steering clutch since the transmission is apparently locked up.

Sounds like you have isolated the problem to the transmission input shaft/clutch shaft area.

Engine turns with the clutch disengaged and pinion shaft and ?? transmission shafts/gears and everything on back to the tracks turns with the trans in neutral.

Might be worth a look up the back end where whatever it was was once mounted on the rear case. Not sure what you might see, but should be looking at the back end of the problem shaft.

Left steering clutch must be stuck but might break loose if you get the rest going and can apply full power to it with the lever back. That steering clutch lever has normal feel and free travel doesn't it?

Try removing the coupling between the clutch and gearbox so you can isolate the problem to the clutch output bearing or the gearbox input/bottom shaft bearings.

did I read right that the transmission is full automatic trans fluid and some water or have I miss read this ??
So you filled the transmission with diesel and it ran out the input shaft
I wonder if the bearing on the input shaft has seized wouldnt be the fist gear I have seen like that the bearing is high up and spins the fastest and when the oil is low its the one that gives out first
or maybe as simple as a selector fork busted

Paul

Thanks for the replies. It took me a lot longer to get the hydraulics, fenders, and the pony flywheel off yesterday than I thought it would. Only one bolt twisted off and I had to use heat on the pony flywheel since my pullers are still in storage somewhere. Currently all the bolts on the transmission cover are loosened. I need to loosen up the brake pedals, back off the steering clutch adjustments and disconnect the flywheel clutch linkage.

So the order I was going to look more clues is:
1. Pull cover over rear output / pto shaft and see if there is a "potato in the tailpipe" e.g. something jamming the bottom transmission shaft. I am assuming that is where the pto is driven from since I have seen a diagram yet.

2. Pull cover off transmission. I think I need to do this in any event since I really want to see how things look under there.
3. Look for bent forks any signs of broken bits, disconnected metal, tools...
The only gear I haven't been able to shift into is 5th. So 5th gear would get special attention.
4. Look for play in bearings.
5. Find the stuck bearing. ( this has the highest probability in my mind since it rolls so nicely in neutral )
This would be the time I start pulling apart the coupling between the flywheel clutch and transmission.

Any tips on isolating the bearing without a total tear-down would be appreciated.
6. Since the stuck right steering clutch will be more accessible any tips on lubricant and prying would be welcome.

All I need to do now is get the above done before it rains again.

Paul: The tractor came with ATF in the transmission. The level was very low but on dipstick. After draining old ATF ( while looking for metal and water: none and little ) I overfilled the compartment with diesel. I did this for cleaning, bearing revival and to see where it leaked out. It leaked out the front for the most part and the low level point is just below full on the dip stick. The bearing isn't back to life yet, but while diesel isn't the best penetrating oil it is better than air and cheaper than 5 gallons of Kroil. Also the diesel will be used for the parts cleaner tank.

Steve

I pulled the pto cover and got a little bit of diesel. I used the phone to take a look in there for curiosity's sake.

The back bearing on the top shaft does not look very useful.

I will try the next larger size for the photos

[attachment=36251]ButtercupBadBearing_ - 1.jpg[/attachment]

And a little closer

[attachment=36252]ButtercupBadBearing_ - 2.jpg[/attachment]

But as I preview the posting it wouldn't seem this is the problem since the tractor rolls in neutral. On to step #2

Steve