TC40D no forward/reverse or pto

[JC-jetro]

I think Jim got it right as far as not transferring engine power to transmission thru the input shaft.

This could happen two ways either what Jim said ( a total mechanical failure or damage to splines on input shaft or shafts), or the clutch disk.

In the latter scenario the pressure plate and flywheel might not squeezing the clutch plate hard enough, basically a slipping clutch. Slipping clutch can manifest itself both in drive and pto. The bad part of it is you still need to split the tractor to check, and good part is changing clutch will be less expensive that changing broken mechanical pieces.Do you know if you have any inspection hole on the clutch housing to look inside?

JC,

If I could, on smaller tractor probably lift the back end of tractor on stand and try to turn the wheel by some mechanical advantage to see if I can turn it with the clutch engaged and tractor in gear. That might give some clues if slipping.

 

[jinman]

JC, there is no clutch or pressure plate on this tractor. What looks like a clutch plate is only a damper disk that is bolted to the flywheel. That's why the short shaft is inserted into the damper on the engine side and mated with the input to the HST transmission with the splined collar. New Holland built a unique tractor with no clutch. I love it. There is no need for a clutch on my tractor or it's siblings the TC40D and TC35D.

 

[JC-jetro]

Jim,

How about them apples Now, you gave me a reason to get the skinny on TC40D. Gotta go to NH website to see it from close.

Thanks,
JC,

 

[jinman]

Jim,

How about them apples Now, you gave me a reason to get the skinny on TC40D. Gotta go to NH website to see it from close.

Thanks,
JC,

Go down to your closest NH dealer and drive one. But don't blame me if one follows you home. You'll have to ask your wife if you can keep it.

Yeah, the engine turns the transmission anytime it is running. Of course, with the pedals in neutral, the HST's hydraulic pump is not pumping any fluid and the the tractor doesn't move. The PTO drive goes through the transmission and an idler gear. When you want to run the PTO, you have a lever that controls a valve to divert hydraulic fluid to a hydraulic clutch that engages the PTO. When you release the PTO this same clutch becomes a brake. That's a fully independent PTO. If you lose your main hydraulic pump on the engine, your FEL, 3PH, and PTO will not work. If you have hydraulic power and the engine is not connected to the transmission, then the PTO cannot operate even though the clutch engages. That's why the OP's tractor has no forward, reverse, or PTO. It can really only be one thing. . . .I think.

 

[DocHeb]

Here is the thread in which I described a similiar problem, and my repair was simple and did not involve splitting the tractor. It was a snap ring related to the transmission charge pump:

TC40D HST/PTO Fails

And another thread I had saved under the same problem type:

TC40D PTO/Hydro Problem

 

[gould37]

GREAT INFORMATION !!! I appreciate everyone's input. The 3pt hitch and bucket are working, so is it safe to say that the main hydrolic pump is ok? Sounds like it, correct? Does anyone have a picture of this snap ring in a tractor, and where would I look to see if it is there. If it is missing, I may not realize I am looking in the right area. Keep the info coming, I am planning on towing this into the shop this week-end for a look and see. I will keep you posted on what I find out....

 

[JC-jetro]

Go down to your closest NH dealer and drive one. But don't blame me if one follows you home. You'll have to ask your wife if you can keep it.

Yeah, the engine turns the transmission anytime it is running. Of course, with the pedals in neutral, the HST's hydraulic pump is not pumping any fluid and the the tractor doesn't move. The PTO drive goes through the transmission and an idler gear. When you want to run the PTO, you have a lever that controls a valve to divert hydraulic fluid to a hydraulic clutch that engages the PTO. When you release the PTO this same clutch becomes a brake. That's a fully independent PTO. If you lose your main hydraulic pump on the engine, your FEL, 3PH, and PTO will not work. If you have hydraulic power and the engine is not connected to the transmission, then the PTO cannot operate even though the clutch engages. That's why the OP's tractor has no forward, reverse, or PTO. It can really only be one thing. . . .I think.

Thanks Jim,

very interesting, correct me if I'm wrong, let say engine is on, transmission coupled to engine, you have cruise on and all of sudden something jumps in front of you and you push hst pedal and it is jammed you keep going forward and can not kill the power to transmission since you got no clutch. am I right?

As far as "wife Department" I'm softening her up pretty good. Two week ago was our 25th yr anniversary and I went to "Tivol", where only the pretty people go and bought her a diamond ring. She said, Oh .. it's so beautiful .. but you should not have and she promptly said " Now I feel obligated to buy you a tractor that you like". I've got a stack of tractor brochures next to my nigh stand and that's my reading material before I fall asleep.

JC,

 

[jinman]

Thanks Jim,

very interesting, correct me if I'm wrong, let say engine is on, transmission coupled to engine, you have cruise on and all of sudden something jumps in front of you and you push hst pedal and it is jammed you keep going forward and can not kill the power to transmission since you got no clutch. am I right?
JC,

Have you been watching me operate without me knowing it?

The situation is that you have three things you can do in that scenario. It takes some effort, but the cruise electromagnet will allow the pedal to slip. But if you are in a panic, you have to remember which pedal your foot is on. Pushing more on the forward pedal will not make the tractor stop. On the left side where a clutch pedal normally is, these tractors have the brake pedals. Stepping on the brake pedals disables cruise the same as in a car. Also, I just make it a habit to keep my right hand laying near the cruise switch rocker so I can flick it off in a hurry. This is not important in the middle of an open field, but when I'm driving down our county road to go to a neighbor's house, I often use cruise. But I never know who may pull out in front of me, so I keep my hand on the switch for the quickest response time. I can also tell you that it is a good idea to keep your foot resting on the HST pedal because if you disable cruise at any speed, the tractor slows so quickly you feel like you are being launched over the steering wheel. Wearing your seatbelt is highly recommended.

 

[DocHeb]

Here is the thread in which I described a similiar problem, and my repair was simple and did not involve splitting the tractor. It was a snap ring related to the transmission charge pump...

I must correct my error in this post. Looking at the manual shows that the charge pump is accessed by splitting the tractor, but I cannot identify this "snap ring". It may be accessable in some manner without splitting the tractor, but I must defer to somebody that actually knows what he is talking about (RickB - now is your time to come in here.)

 

[jinman]

Here is the thread in which I described a similiar problem, and my repair was simple and did not involve splitting the tractor. It was a snap ring related to the transmission charge pump:

Chris, I don't doubt your word, but I'd pay good money to see how they could replace that locking ring without splitting the tractor. There are no access plates on the front transmission housing and I don't think they can go into the starter/flywheel access. I am completely baffled.