8n clutch trouble

[Tim OOO]

Hi,
I am repowering my 8n with a 9n engine. The engine has a newer clutch and pressure plate. I installed the engine and have lots of slop in the clutch pedal. There is about 4 inches of travel (In the pedal) before the release bearing makes contact with the clutch fingers. I did check the linkage and replaced pin in the clevis type clutch adjustment, it was quite worn. The clutch shaft is good and the clutch fork looks good,though I don"t have another fork top compare.
There is no bolts on the clutch fingers to adjust.
I apply the pedal to the clutch and do not have enough movement to disengage the pressure plate from the clutch.
The clutch disk is installed correctly with the long side to rear of the tractor.
Is there a way to adjst the fingers on the pressure plate?
Any idea why I have so much pedal play?
Yes, I do have the clutch adjustment almost as much as I can go on the clevis type clutch adjustment.
Thanks Tim

 

[36 Coupe]

Dont ever mess with the fingers of the pressure plate.Many pressure plates are made without adjusting bolts.Since the clutch disc is the same as Ford cars I suspect the new disc is thicker than normal.I have had to use a longer adjusting bolt to get proper clearance on a lot of clutch repairs.

 

[Tim_Ewald]

Howdy! Just got done replacing the clutch on my 2n. The old one had adjustment bolts on the fingers, the new one I bought didn't. I do beleive that there are adjustment bolts but there on the other end of the fingers (not the ends that touch the preesure bearing). I agree that they should have be set correctly but if you have no other choice but to buy a new one I would try to adjust them. Just be careful to make sure that you adjust them all the same way and then I'd put locktite on them. Once you bolt it back onto the flywheel you can re-check the height on each finger before putting it back together..Just my 2 cents worth..
My clutch wasn't too bad, but the pressure bearing (throwout) was only hitting on two fingers just started hitting the third (There was paint still on the adjustment bolts but who ever adjusted them must have been drunk or stoned or both), but it wasn't enough to dis-engage the clutch. Good Luck, Tim

 

[Tim OOO]

Thanks for the answers.
I did put the old pressure plate and clutch back in and the clutch works again, but I still have alot of play in the pedal.

I will not be able to put a longer bolt in for adjustment as the 8n clevis type adjustment will not allow for it. The clucth and pressure plate came from a 9n, hence maybe there is enough adjust in the 9n to overcome this problem.

I will make a gauge for the fingers and look at alternatives and continue my research.

If there is any comments or suggestions anyone would like to make, please do.

I still don't understand the amount of pedal play I have when the book calls for 3/4 play.My pedal goes about 4 inches before the release bearing touches the clutch fingers.

 

[Anonymous-0]

FYI, there is absolutly no difference between a 9N clutch and an 8N clutch (pressure plate, friction disc, throw-out bearing and throw out bearing carrier). Even the flywheels are the same except the side mount distributor models have timing marks on the flywheel. And the transmission input shaft and housing are the same except the early 9N"s with straight cut gears.

 

[Tim_Ewald]

Just a thought but if its just the play couldn't you shorten the rod that goes into your clevis? Use a die and put some new threads on it? (shorting the rod will take the slack out of the linkage) Maybe that threaded rod was replaced at one point?

 

[Tim OOO]

Just a thought but if its just the play couldn't you shorten the rod that goes into your clevis? Use a die and put some new threads on it? (shorting the rod will take the slack out of the linkage) Maybe that threaded rod was replaced at one point?


No, because the foot pedal arm will bind on the linkage. I have already tried to shorten all the way, the eyebolt needs a little room or couple threads showing so there is no binding.

I did look at another 8n in very good shape. I noticed there is alot of play in the pedal on that tractor to. I do seem to have more.