L1802DT 4x4 Not Engaging

[jjanmaat]

Hello,

I've just acquired/inherited an L1802DT. Engine runs very well, but I can't get the 4x4 to engage. The front wheels counter-rotate, so I'm guessing the drive train is O.K., at least up to the transfer case. Control lever moves from 2wd to 4wd, but the front wheels don't get any power.

I'm a complete novice, so any suggestions are welcome.

Thanks,

John.

 

[bruceatlam]

Re: L1802DT 4x4 not engaging

There is most likely a linkage attached to the control lever that moves back and forth. Is that linkage there? If you grab hold of the 4WD actuator on the outside of the transmission, does it mover back and forth with the control lever??

 

[jjanmaat]

Thanks for the responses.

The 2wd/4wd control and linkages seem pretty solid.

Image is a bit big, sorry.

The actuator moves up and down, with the button sliding into the respective hole when fully up and fully down.

Based on the comment, my next step is to remove the drive shaft cover and see whether anything is stripped. In the photo, it looks like there is an oil drain. Can I remove the two bolts on the drive shaft cover and slide it back to see what is going on, or do I have to drain off the oil first?

Thanks,

John.

 

[ipz2222]

You don't have to remove that drain plug. That tube that has the 2 bolts on it ,covers the shaft. That tube is a 2 piece, tube in a tube. Under the eng , there should be a flange with 2w bolts that hold that tube to the eng. remove those 2 bolts, then the 2 bolts at the rear of the shaft, and then push the rear tube fwd . This will expose the slip joints. Mine has circlips but most have pins that must be driven out. Once the pins are out, the slip joints slide fwd or backward to allow th drive shaft to come out.

 

[jjanmaat]

Thanks for the responses.

I've pulled the cover back from both ends of the driveshaft. The transmission end seems solid, if a bit rusty. The front end is loose. I can turn the wheels and it feels like it is bumping against the driveshaft, but nothing is catching.

My machine has a front end loader, which is supported by a beam and frame bolted to the bottom of the tractor. A main beam is attached below the drive shaft. I'm guessing I have to take the loader off to remove the driveshaft. Am I right?

Here are some photos:

Thanks for your suggestions.

John.

 

[ipz2222]

No, nothing on the frame has to come off. It's very hard to explain without pictures. There is a small stub sticking out of the front diff and another from the rear trans. both have splines. In between these 2 is a driveshaft with splines on both ends. There is a sleeve with internal splines on both ends that slides up on the dirveshaft to let it drop out. One of those splines are probably stripped.

 

[J252]

I just recently had to troubleshoot a L345DT for the same problem.

Not sure if your tractor would have similar design in transfer case internals to my L345DT, but I'll chime in anyway.

See attached Pic. In my case the end of the shift lever (part with green arrow) had worn off where it touches the gear collar. I had to replace the lever to bring 4wd back to life.

 

[ipz2222]

I just looked at that last picture you sent. Yes, that cross beam will have to come off to get the driveshaft off.
But before you do that, lift the front wheel off the ground, engage the 4wd lever and try to rotate both front tires the same direction at the same time. Does the drive shaft turn?. Is it turning the stub that goes into the transfer case(transmission)?

 

[WinnieCouple]

I know this post is several months old, but did we find out what the problem was....??
I am in the same situation with my L245DT
I'm worried (just bought it a couple months ago) 4x4 was not working when bought.
BUT, my front tires, when lifted, will spin independent of each other, one has no effect on the other... so i am wondering if my front diff is where I should look first??
I will be pulling my front drive cover in the morning, but i feel like my shifter fork may not be engaging either.

 

[hodge]

I know this post is several months old, but did we find out what the problem was....??
I am in the same situation with my L245DT
I'm worried (just bought it a couple months ago) 4x4 was not working when bought.
BUT, my front tires, when lifted, will spin independent of each other, one has no effect on the other... so i am wondering if my front diff is where I should look first??
I will be pulling my front drive cover in the morning, but i feel like my shifter fork may not be engaging either.

So, you are saying that when the front end is off the ground, with both tires in the air, you can spin either one, with no affect on the other? When you do that, can you tell if the front driveshaft is spinning? When you turn a tire, one of three things are going to happen, if nothing is wrong in the front axle- turn one tire, the other tire will turn the opposite direction, the other tire won't spin, but the driveshaft does, or a combination of both, at the same time. If something is broken in the front axle, then you can turn one tire without affecting the other tire or the driveshaft. When you turn the tire, do you hear any noises? You bought it without knowing if the 4WD worked? Did you get money off of the tractor?

 

[WinnieCouple]

So, you are saying that when the front end is off the ground, with both tires in the air, you can spin either one, with no affect on the other? When you do that, can you tell if the front driveshaft is spinning? When you turn a tire, one of three things are going to happen, if nothing is wrong in the front axle- turn one tire, the other tire will turn the opposite direction, the other tire won't spin, but the driveshaft does, or a combination of both, at the same time. If something is broken in the front axle, then you can turn one tire without affecting the other tire or the driveshaft. When you turn the tire, do you hear any noises? You bought it without knowing if the 4WD worked? Did you get money off of the tractor?

I have not taken the front drive shaft cover off yet, to see whats going on, but yes one will spin without the other... I was going to check it today, but its finally getting a little rain around here ( just enough to keep me from doing anything).
I feel like I still got a good deal on the tractor, as I wanted the 4x front axle being stronger for the FEL. I've pulled the lube fill plugs on each side and rotated a wheel and the axles in the tubes turn smoothly. So again, I'm hoping trying to narrow it down to what COULD be wrong.
I'll be draining the hydraulics this week and changing the suction filter, I plan to pull the rear driveshaft output housing to check the inner fork of the 4x selector shift (only if I dont find anything when i slide the front propeller shaft covers and see if it all moves together).

 

[284 International]

WinnieCouple, Hodge did a good job of making a troubleshooting flow chart for you to investigate.

Here's what I would suggest:

1. Jack up one side of the front axle. Place the tractor in 2wd. Spin the lifted tire by hand. The drive shaft and pinion input should spin. (You may need to pull the cover over the drive shaft to see the either it or the pinion input)

2. If the pinion output spins but the drive shaft does not, the problem is at the coupling of the two.

3. If the pinion output does not spin, there is something wrong inside the axle. Possibly the ring gear, spider gears, or the hub gears are broken or stripped.

4. If the drive shaft spins, try placing the tractor into 4wd with the tractor in gear. Try turning the tire again. It should not spin freely.

5. If it spins freely, there is something wrong internally. It may not be engaging 4wd, or there may be a stripped gear or splined coupling on the transmission end of the drive shaft.

Try going through your tractor following these steps, and let us know what you discover.

 

[WinnieCouple]

That will be my plan for the day... she's up on jacks and stands, its not raining and its nice and cool out, so I'll be right on it as soon as i finish my "honey do" list for the morning.

Thanks.

 

[hodge]

What is the u-joint cover made of on your tractor? On my B7100, it is a flexible boot- I could squeeze it, and feel the shaft turning. You may be able to do that, without taking anything loose at the driveshaft.

 

[WinnieCouple]

What is the u-joint cover made of on your tractor? On my B7100, it is a flexible boot- I could squeeze it, and feel the shaft turning. You may be able to do that, without taking anything loose at the driveshaft.

There are no u-joints, actually i dont think there are any on the entire tractor, it has a splined shaft with female splined couplings at each end, you slide the c-clips back slide the couplings back far enough to do what you need, then slide it back and seat the clips...
I found out my front pinion had sheared almost an inch from the end, just before the C-clip channel.
SO, i've gotten it all pulled apart and the pinion out, now i need to see if i can buy the pinion by itself or if i'll have to buy a gear set.