New Holland TN75D Clutch /Pressure plate issues.

[Harry in Ky]

I see five photos. The first one appears to be the back side of one of your throw out bearings, probably the smaller, main clutch bearing (size is deceiving with no frame of reference ). The second one looks to be the front side (goes against pressure plate levers) of (probably) the larger bearing? Again actual size is hard to determine. Third picture is the pressure plate assembly with three levers damaged. . The fourth photo is of both bearing assemblies. The back (transmission) side of both would be to the left of the photo, the front (pressure plate side would be facing the right side of the photo. Fifth photo is of the PTO shaft. It shows some spline wear and some wear at the point the shaft fits into the pilot bearing. That wear would indicate the tractor ran for some time with a very rough, probably sticking/skipping pilot bearing at one time. I would check the fit of a new pilot bearing onto that shaft before installing anything. Is the spline wear enough to justify replacing the shaft? Unless your plans include mostly heavy PTO work for the rest of the tractor's life, I would say no. The pilot bearing area might be a different concern. If it's a super sloppy fit into the bearing, you will need to do something.

 

[spedracr89]

I see five photos. The first one appears to be the back side of one of your throw out bearings, probably the smaller, main clutch bearing (size is deceiving with no frame of reference ). The second one looks to be the front side (goes against pressure plate levers) of (probably) the larger bearing? Again actual size is hard to determine. Third picture is the pressure plate assembly with three levers damaged. . The fourth photo is of both bearing assemblies. The back (transmission) side of both would be to the left of the photo, the front (pressure plate side would be facing the right side of the photo. Fifth photo is of the PTO shaft. It shows some spline wear and some wear at the point the shaft fits into the pilot bearing. That wear would indicate the tractor ran for some time with a very rough, probably sticking/skipping pilot bearing at one time. I would check the fit of a new pilot bearing onto that shaft before installing anything. Is the spline wear enough to justify replacing the shaft? Unless your plans include mostly heavy PTO work for the rest of the tractor's life, I would say no. The pilot bearing area might be a different concern. If it's a super sloppy fit into the bearing, you will need to do something.

*The first two photos are the same piece so if I am understanding you correctly the 2nd picture should be against the pressure plates levers. So if it was installed the other way that might explain why it broke the ears off.

"The fourth photo is of both bearing assemblies. The back (transmission) side of both would be to the left of the photo, the front (pressure plate side would be facing the right side of the photo."

*Ok I understand you are saying I have them setting completly wrong. As they set on the tire the pressure plate is to the left and the transmission is to the right. So it sounds like they need a 180 then they would be correct.


" That wear would indicate the tractor ran for some time with a very rough, probably sticking/skipping pilot bearing at one time. I would check the fit of a new pilot bearing onto that shaft before installing anything. Is the spline wear enough to justify replacing the shaft? Unless your plans include mostly heavy PTO work for the rest of the tractor's life, I would say no."

*The tractor is used to run a 6ft sickle bar mower on about 200 acers of grass split up in 3 different locations. Then a 4x5 round baler doing about 200 + bales of hay 2 to 3 times a year. So I would say 50 to 75% PTO use.

 

[Harry in Ky]

If that's the case, then yes, I think you had both bearings in backwards. The wider, hardened surfaces on each of the sleeves should contact the levers.

The shaft condition is a judgement call. The spline wear is noticeable, yes, but in my opinion not necessarily a "must do" repair. It does seem a bit strange to me the spline length and placement of the worn spots. I don't remember the splined portion of the shaft being as long as it appears in the photo. The PTO disc contacts the flywheel when engaged, so the center hub would be much closer to the pilot bearing than it would be to the worn spots. Somehow this just doesn't seem quite right to me, but it has been a while since I was "hands on" with one.

At any rate, the shaft is about a $500 item, and will require significant effort to replace. It comes out the back of the transmission, so a rear split would be in order. With a straddle mount cab this is no simple feat. I'm sure the "book" calls for cab removal for this operation. Having never done it, I can't say if it's possible or not without removing the cab. I doubt it.

If I were doing this, I would probably try to address the pilot bearing contact surface as best as possible with the shaft where it is, hope for the best in that regard and call it good at that.

Your tractor, your money, your choice.