I400 FRONT LOADER TRACTOR

I don't know the industrial line very well but I think that is basically the same tractor as the d15. If so I would say you have a bad shuttle clutch. On the d15 there is a side access panel on the torque tube on the right side. From there you can get to the clutch pack and adjust the shims to tighten it up. If that doesn't work you might have to split the tractor. I would say you will need the service manual for sure.

a 400 is the same as a d10-12 does your 400 have a reverser or is it a straight 4 speed with reverse or does it have 8 speeds forward and 2 reverse,

thank you all for your comments, i will open the side up tomorrow. it is 4 forward and 4 reverse.it doesnt even try to go ibto reverse, email mrneeky1@gmail.com

Before you open the side cover make sure you drain the oil for that compartment.   Does the gear shifter in the transmission closest to the seat have 4 speeds plus reverse or just 4 speeds with a separate lever for reverse?

From the comment above about it being like a d10 d12 they are saying there are three transmission options for your tractor. One is just a 4 speed transmission with reverse.   The second is the same transmission with a high low clutch pack in the torque tube in front of the transmission the third option is the shuttle clutch in the torque tube with a 4 speed transmission without reverse in the transmission.   If you have the third option you problem is in the torque tube shuttle clutch if you have the first two options it is in the transmission.   Be sure which setup you have before you take the effort to open up anything looking for the problem.

I am glad someone who has one of these has gotten in to this discussion I stand corrected clearly my experience with my d15 won't help. So please exnore my comments above.

the fwd and rev lever is the shuttle clutch.

The first thing to check is that the key locking the lever onto the shaft didn't fall out. And that you can see a the shaft moving when you move the lever. After that I would get the manual and read the section on the shuttle clutch you can probably adjust the shims in the shuttle clutch pack but you will need to read the service manual first to know what the correct procedure is. If that doesn't work you would have to split the tractor and replace the clutches. I am just confused by your discretion that you can't get it into reverse normally it will go into reverse but it won't back up well. The typical problem of weak clutches shows up as you can back up on flat ground but as soon as you come to a hill it will stop because the clutches slip.

That lever has a button on the top that moves a pin down near the bottom of the lever look to see if something is blocking the pin. My d17 has a tendency for the lower pin to hit one of the bolts on the cover plate. That lever on the inside of the transmission moves a fork to switch the clutch pack I can't think of anything in there it could be binding on I would quicker think your problem is the little lock pin on the bottom attached to that button on top normally on mine when I have trouble the button is stuck down and I take a screw driver and just force the little pin on the bottom back into the handle.

i dont see the button you are talking about, do you?

thank you for your help, i think you are right about something out of place, blocking its path to go into reverse

You might try looking it up on agcoparts.com and you can find the expanded parts drawing there which would give you some idea what is on the inside. I am wondering if you dropped a wood drift key or something like that but not having worked on one of them I can't say how they are made.

looks like a range shift on a D12 to me...

found serial number, it is an i400.still have not figured it out

thank you