Well, clutch IS stuck on my 155D

[Goldchaser]

Okay, just to clarify things so there is no confusion.

All four wheels are off the ground. With clutch out, turning the rear wheels results in both wheels turning, with the oposite turning in the opposite direction.
Thats with it in gear and either in low or high range. With clutch pedal depressed, same thing. With tranny in neutral wheels turn the same. Plus the wheels turn easily no matter if in or out of gear or clutch depressed or not.

I did get a chance to try starting it tonight. Didnt actually start it because I started dumping hyd fluid out of a hose. But I did discover why the guy that gave it to me may not have been able to start it years ago. When I replaced the old battery, I put it back the same position, etc as the old one. It was an identical battery. Couldnt get it to turn over. New battery and barely enough current to beep the horn....except suddenly it would and it would start to turn over then it would stop. Even putting the charger on it didnt make a difference. it might or might not turn over, might or might not have enough power. Scratching my head....I depressed the clutch pedal with my hand and turned the key while ducked down watching the front of the tractor and saw a faint spark. Went to the front, unbolted the battery, moved it off the battery box temporarily and tried turning the engine over again. Worked perfect. No further problems loosing current.
What it was, the battery terminals on that particular battery were sitting fairly close to the radiator. Close enough that with vibration or dust or dirt it would arch from the pos to the radiator. It wouldnt start then...and though it seemed to be intermitant it was loosing enough power from the battery that even if it turned over it would not start more than likely. I reversed the battery so the terminals were opposite and everything was fine. While I was turning it over I could tell it was wanting to start...didnt let it because of the hydraulic hose leak. But now I know the engine is good and why the previous owner couldnt start it.

 

[BigStoke]

I can suggest a quick fix for your stuck clutch, I've seen where the clutch gets stuck when the tractor is stored in areas with high humidity. I've done this a couple of times, but its somewhat dangerous so be careful if your going to attempt what I'm about to suggest. First put your tractor back on the ground and roll or drive it a spot where you have a good 75 to 100 feet in front of you, start your tractor and put it in high range and shift to your highest forward gear, make sure to put it in gear at a low idle, once your moving go ahead and throttle up to 2000 to 2400 rpm, once your moving slam on your brake and clutch pedal simultaneously, it may take a couple of tries but you'll eventually get it unstuck.

 

[Tom_Veatch]

...
All four wheels are off the ground. With clutch out, turning the rear wheels results in both wheels turning, with the oposite turning in the opposite direction.
Thats with it in gear and either in low or high range. With clutch pedal depressed, same thing. With tranny in neutral wheels turn the same. Plus the wheels turn easily no matter if in or out of gear or clutch depressed or not.
...

Good Show on the starting problem.

Now try the tire rotation with the differential lock engaged or with a chock blocking rotation of the opposite wheel. What you are seeing is the opposite tire being rotated by the differential gears. I doubt there is enough torque on the drive shaft under those conditions to cause the transmission to turn over. All your input torque is going through the differential gears to turn the opposite wheel. If you want the tire rotation to turn the transmission and clutch, you're going to have to prevent the opposite tire from turning in the opposite direction. Either chock it, or engage the diff. lock.

I've seen nothing that you've reported in this thread, so far, to indicate there is any problem with the clutch. Is there another thread in which you've discussed your problems?

 

[kyspartan]

tom is right about the rear diff. i have nothing to add because he dishing it out point blank

 

[Goldchaser]

Good Show on the starting problem.


I've seen nothing that you've reported in this thread, so far, to indicate there is any problem with the clutch. Is there another thread in which you've discussed your problems?

Will try engaging the differential lock in the morning and then turn the wheels as you suggested. Not sure if I had tried that yet. Someone else had suggested it I think as well. If I didt try it, dont know why. Guess because just trying to work on too many things at the same time.

REgarding your question above, I had just mentioned in another post that I was halfway afraid of the clutch being stuck because of the length of time that this tractor had been sitting unused, ( 8 Years). So I tried putting it in gear and out of gear, etc, and got the results that I had posted at the beginning of this thread. As it seems to have turned out, I likely am or was wrong in that I may not have evaluated it properly. Which happens....I have never claimed to be allways right....(dont tell my wife that )

Its been a slow process working on this the last few weeks because of having to order manuals, and order parts, and waiting for those same parts to arrive.
I couldnt really do a whole lot at first simply because I had no manual at all, not even an owners manual for it, let alone a shop manual. The local tractor dealers have been little help either in suggestions or in obtaining parts. Not one of their tractors so they could care less. Which surprised me because I have been a customer of them for a number of years now.

 

[JC-jetro]

That's true if both wheels are rotated in the same direction, or if one wheel is blocked such that it can't rotate. But, if both wheels are off the ground, and free to rotate, when one wheel is manually rotated, the other wheel will likely rotate the opposite direction due to gearing in the differential. If that's the case, it's likely that the transmission/clutch isn't being rotated at all.

I'm not saying that's the case here, but the original post wasn't clear on whether both wheels were free to turn or, if they were, what was happening to the opposite wheel when one wheel was manually rotated.

The opposite direction of wheel rotation is correct due to differential gear design and the fact that there are two shaft separate from one another that rotate the wheels on the rear axle (limited slip differential). Obviously the wheels do not rotate at the same RPM turning left or right. the point I was trying to make was if either wheel turned that would be proof the clutch is not frozen(stuck) to pressure plate and flywheel. Stuck clutch plate and you could not turn the wheels. if the clutch disk was stuck then i would attempt pull start the tractor with clutch pedal pushed in to have it unstucked.

I'm suggesting that one of possible two things can be the culprit.

1) if the clutch plate is so consumed where clutch plate surface barely touching pressure plate, fly wheel or both.

2) if the clutch pedal is so out of adjustment that the throwout bearing constantly riding with pressure on the pressure plate finger that disengages torque from engine crankshaft and the transmission input shaft. In this fix pushing the pedal in only disengages the clutch more.

In my opinion we need to eliminate #2 possibility above by clutch adjustment before entertaining the idea of tractor split. Tractor split is certainly not a show stopper but why go there if not needed.

JC,

 

[Goldchaser]

Thanks Tom,

Ok, I had a chance to get out this morning and mess with the tractor.

Here is what I have found.

With the Differential Lock in place, and the tranny out of gear, the rear wheels turn the same direction but with just a little more difficulty.

With the Diff lock still in place and placing the tranny in gear, wheels become VERY hard to turn.

Depressing clutch pedal allows rear wheels to turn. Letting up on the clutch and the wheels get difficult again.

All of the above with the differential lock locked.

So, unless I am wrong, it seems I was wrong. My clutch seems to NOT be locked up. At least until I get it running and check it further. Have to fix a hyd hose gusher before I run the engine again though.

I want to thank you, Tom, and everyone who responded. I ended up feeling kinda stupid, but I learned alot too.

Dennis

 

[JC-jetro]

Thanks Tom,

Ok, I had a chance to get out this morning and mess with the tractor.

Here is what I have found.

With the Differential Lock in place, and the tranny out of gear, the rear wheels turn the same direction but with just a little more difficulty.

With the Diff lock still in place and placing the tranny in gear, wheels become VERY hard to turn.

Depressing clutch pedal allows rear wheels to turn. Letting up on the clutch and the wheels get difficult again.

All of the above with the differential lock locked.

So, unless I am wrong, it seems I was wrong. My clutch seems to NOT be locked up. At least until I get it running and check it further. Have to fix a hyd hose gusher before I run the engine again though.

I want to thank you, Tom, and everyone who responded. I ended up feeling kinda stupid, but I learned alot too.

Dennis

I reckon "you was wrong" Well, if I were paid a dime each time I felt stupid then I wouldn't be here talking to you chums...been there done that

I think your clutch not only " is not locked up" but it is performing as it should if you can engage and disengage it with the pedal pushed in. Well.. we sure made full circle... no matter ! more info for future reference.

Now, fire her up and tell us if she puurrrs or not

JC<

 

[Tom_Veatch]

...
My clutch seems to NOT be locked up. At least until I get it running and check it further. Have to fix a hyd hose gusher before I run the engine again though.
...

I agree. What you are describing should be what you see if things are working right. With diff. locked, out of gear, wheels turn but with a little more difficulty than with the diff. unlocked. Diff. locked, in gear, clutch disengaged, slightly more difficult to turn since you are now turning over more transmission components as well as the clutch. Diff. locked, in gear, clutch engaged, very difficult to turn because now you are also trying to turn over the engine as well as the entire drive train.

Looks to me like you should be good to go when the hydraulic leaks are plugged. Congratulations and enjoy your tractor!

BTW, I got a sense from one of the posts that I might be coming across a little stronger than I intended. If anyone read anything confrontational in any of my posts, please accept my apologies and my assurance that it was entirely unintentional.

 

[Goldchaser]

I reckon "you was wrong" Well, if I were paid a dime each time I felt stupid then I wouldn't be here talking to you chums...been there done that

I think your clutch not only " is not locked up" but it is performing as it should if you can engage and disengage it with the pedal pushed in. Well.. we sure made full circle... no matter ! more info for future reference.

Now, fire her up and tell us if she puurrrs or not

JC<

Thanks to you too, JC. Your help and encouragement was/is also greatly appreciated.

One thing I do know. What I have discovered and found the last couple weeks is a testament to the toughness and overall quality of a Yanmar tractor. I mean, this thing sat unused, abandoned really, for 8 years outside in the weather. And last winter, I know for a fact that it sat under 6 feet of snow for most of the winter. And what have I discovered REALLY wrong with it? The seat rotted and some rubber hydraulic hoses cracked and the fuel cap rotted away and it needed a new battery. Oh, and it now needs a paint job. Everything else has been pretty much just basic maintenance.
Oh, and I discovered I wasn't as smart as I thought I was.

Going to get that hose fixed, put the bucket back on and should be ready in a couple of days to make my inaugural exit from the garage. If it starts. Hopefully not jinxing things, but I would be very surprised if I wasnt able to get that engine started right up.