Clutch Issue

dxvoyager

Member
I have a Ford NAA tractor. I am unable to change gears because the clutch is not engaging. My wife's brother came over last week to look at the problem. He informed me
that the throwout bearing is not depressing the forks on the clutch. He says there's about a 3/4" to 1" gap between the bearing and the forks. I have purchased a new 9"
clutch assembly. The gentleman at the tractor store says the old one looked okay to him. He said the only difference in the old assembly and the new one is that the
clutch pad on the new one is a little thicker than the old one. I would like to know how to proceed from here. I am supposed to see that gentleman again on Monday to
discuss with him this problem, but if I can get tips and help here, I'd greatly appreciate it and it would save me a trip. Thank you in advance.
 
Sounds like you have a problem with either where the clutch pedal moves the shaft the throw out bearing is on or the mount on the shaft for the throw out bearing. Or you had the clutch way out of adjustment
 
(quoted from post at 18:45:31 06/13/15) I have a Ford NAA tractor. I am unable to change gears because the clutch is not engaging. My wife's brother came over last week to look at the problem. He informed me
that the throwout bearing is not depressing the forks on the clutch. He says there's about a 3/4" to 1" gap between the bearing and the forks. I have purchased a new 9"
clutch assembly. The gentleman at the tractor store says the old one looked okay to him. He said the only difference in the old assembly and the new one is that the
clutch pad on the new one is a little thicker than the old one. I would like to know how to proceed from here. I am supposed to see that gentleman again on Monday to
discuss with him this problem, but if I can get tips and help here, I'd greatly appreciate it and it would save me a trip. Thank you in advance.



engageing or disengaging.... its common for the plate to rust or stick to the flywheel and the clutch will not disengage,, therefore it will not shift or allow the tractor to stop.... This happens after a raining season and the tractor has set a while. Many posts on how to break it loose with out removeing...

If linkage is not pushing in pressure plate, that is the same symptom but different cause than the sticking plate.
 
just a joke..take the floorboard off... :D ...just a joke

new clutch or old, if you actually have an inch of clearance
at rest between the throw-out bearing and the fingers, you have to fix that first.
broken/cracked linkage, and/or far out of adjustment.
The TO bearing must not touch the fingers with the pedal up,
but it should be oh so close.
Free play in the pedal is what the manuals say,
but I like to put my ear down there so I can hear that faint click of contact when I test the pedal. tells me more.
 
NoNewParts, there is an inch of clearance when the clutch pedal is pressed down. No worries about TO bearing touching the fingers. I have a new clutch assembly and want
to install it, put the tractor back together and see if the same situation exists (which I believe it will.) I am looking for solutions in the event that I am right and
the one inch clearance still exists.
 
(quoted from post at 18:45:31 06/13/15) I am unable to change gears because the clutch is not engaging.

If the clutch is not engaging you should be able to change gears all day long . . . and no engine power will be transmitted to the rear-end. On the other hand, if the clutch is failing to disengage (which is what I think you mean) you either need to adjust it or diagnose and repair the problem.
 
I have installed the new clutch assembly and pad. Here are a couple of photos of my throwout bearing. I think the problem is here. But I'm not an expert so I don't know.
a193715.jpg

a193716.jpg
 

replace throwout bearing,, inspect fork for damage or broke bolt through the shaft. I have seen them broke, bent and the mounting bolts sheared.
 
Had to read up on how to get the throw out bearing off. Sounds pretty easy. I'm also going to inspect the fork for damage and bolt issue. May need some help with this
because I don't know what kind of bolt goes through it or how to get it off or anything like that. I will check back later tonight with results.
 
Okay, I got the throw out bearing with little difficulty. What has me stumped now is the piece of metal holding the fork onto the shaft. I am providing two picture and would like an explanation on how exactly I'm supposed to get that pin/bolt out. I wish the bottom view had come out better. Or, based on the pictures, does the pin/bolt look okay?

<image src="http://forums.yesterdaystractors.com/photos/mvphoto22739.jpg"/>

<image src="http://forums.yesterdaystractors.com/photos/mvphoto22740.jpg"/>
 
Why are you trying to get that pin out? You should be able to replace the TO bearing without dealing with the pin.

That pin is a tapered pin that has been inserted and end upset. The only way to remove is to grind off the end and hope you can punch it out. Most likely you will need to drill out the pin, maybe cut off the fork. As far as I know, the pins are not available for purchase, so now you need to make one. That can be done (I've done it), but you need the right equipment or a friend with a machine shop.

Keep us posted on your progress.
 
I would agree with checking the pin. Make sure its not loose or that the fork rotates on shaft. If every is tight, leave well enough alone. If the fork is lose, then remove the pin and deal with the problem. If it is loose, the pin usually come outs easily once you grind off the end. Some people have used grade 8 bolt to replace the pin. For me, I made a tapered pin, a bolt was too loose for me.

Good Luck.
 
Here is the update for tonight. I replaced the throw bearing and put the tractor halves together. I've got both the large bolts only holding it together. I have attached three pictures. One picture showed the clutch pedal in the at rest position. Another picture shows the pedal when pushed down so the throw out bearing just touches the clutch fingers. The final picture shows how much adjustment I have left in the clutch pedal, which isn't much. There is approximately 2" of travel in the clutch pedal. Any suggestions on what I can do about the extreme play in the pedal?

<image src="http://forums.yesterdaystractors.com/photos/mvphoto22780.jpg"/>

<image src="http://forums.yesterdaystractors.com/photos/mvphoto22781.jpg"/>

<image src="http://forums.yesterdaystractors.com/photos/mvphoto22782.jpg"/>
 
I got the new clutch and pad on and put the tractor back together. I have about 2" of pedal travel before the TO bearing comes in contact with the fingers. As far as I
know there is no damage or looseness in the forks or linkage. What should my next step be?
 

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Back
Top