Farm Equipment - Who has put a new clutch in a D17-IV

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Who has put a new clutch in a D17-IV

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Category: Allis Chalmers
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URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=22569
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Topic: Who has put a new clutch in a D17-IV

Posted By: Paul in ND
Subject: Who has put a new clutch in a D17-IV
Date Posted: 19 Dec 2010 at 7:51pm

I just put a new clutch and remanufactured pressure plate in my D17-IV gas. I also had the flywheel ground and put in new throw out bearing and pilot bearing. Upon reassembly I find myself with 3.5" of free pedal travel and the clutch not disengaging when the pedal is fully depressed. The bolts on the 3 pressure plate fingers were factory adjusted and locked in place with loctite. My gap between bolt heads and throw out bearing is 3/8". Any suggestions on what my problem might be and how to correct? Thanks. Paul

Replies:

Posted By: Matt MN
Date Posted: 19 Dec 2010 at 8:11pm

you might have put the clutch disk in the wrong direction.

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Unless your are the lead horse the scenery never changes!!

Posted By: Jack(Ky)
Date Posted: 19 Dec 2010 at 8:17pm

Has it got the flywheel with the depressed center like a 175 and a lot of others. If it does then make sure that when they resurfaced it they took off the same amount from the surface where the pressure plate bolts down. You could have gotten the wrong PP too. If you have 3/8" between the throwout brng and the fingers that sounds like a little much. It just needs enough so that the brng isn't turning all the time.JP

Posted By: allisorange
Date Posted: 19 Dec 2010 at 8:17pm

Did they take down the part of the flywheel where the pressure plate bolts down. If they did not grind this part of it that might be your problem. I think it should measure 1.437 from the face of flywheel to the ridge where pressure plate bolts up.

John Carlson

Posted By: Gary in da UP
Date Posted: 19 Dec 2010 at 8:17pm

If I read your problem,and understand it correctly , your disc has thicker friction material than what the pressure plate levers are adjusted for. I ran into the same problem several years ago with an A&I clutch assy. on a D15. I think you'll need to adjust the levers.

Posted By: Jack(Ky)
Date Posted: 19 Dec 2010 at 8:18pm

I think Matt may have it right because you said it wouldn't release.JP

Posted By: Jack(Ky)
Date Posted: 19 Dec 2010 at 8:21pm

If they didn't take the stock off the surface where the PP bolts down then it would release real easy but would slip under load. I think it is either in backwards or the PP is adjusted wrong.JP

Posted By: DrAllis
Date Posted: 19 Dec 2010 at 8:27pm

If 3 1/2 inches of pedal free travel is correct, I'd think it should just barely release when put all the way down to the bottom. With the trans in 4th gear and the hand clutch locked in high or low, with the clutch pedal ALL the way to the bottom, what happens when you crank the starter??

Posted By: MACK
Date Posted: 19 Dec 2010 at 8:35pm

This has been a problem for a long time with alot of different rebuilt clutch assy. Make a shim about .100 and put between the pp and flywheel at all six bolts. This should bring the fingers back up to where they should be. MACK

Posted By: Rick
Date Posted: 19 Dec 2010 at 8:37pm

Gary has it right. More than likely the clutch disc is thicker than the original. Rick

Posted By: Paul in ND
Date Posted: 19 Dec 2010 at 10:09pm

Thanks for all the replies so far. Yes, the machinist took the same amount off the pressure plate mounting surface as he did the face. Yes, I am sure my clutch is in the correct direction. Also, my new clutch was only maybe 1/16" thicker than my old one. Does anyone have a spec on far the finger bolt heads should be away from the pressure plate? I suspect I have an incorrect pressure plate.

If I were to put shims between the pressure plate and flywheel mounting surface, wouldn't that reduce the spring pressure (and friction) on the clutch?

Posted By: mark-east-tn
Date Posted: 19 Dec 2010 at 10:23pm

ran into same problem on 45 D about 2 months ago, try adjusting the fingers on clutch i got mine about 1/4 inch of play between throw out bearing and pressure plate. Its not one of the easiest things to do but I used a wrench and put a flat head screwdriver bit in a 1/4 inch drive socket ( whatever size fits your bit) to adjust mine. It works great now , hope this helps .

Posted By: D-17_Dave
Date Posted: 19 Dec 2010 at 10:39pm

The fingers on the pressure plate are made to be adjusted to compensate for the variasions in disc thinkness. They are locked in place just to keep them from coming apart. Most repair manuals I've seen specify this in the clutch repair section and have a spec fort this measured from the flywheel (I think) to the top of the fingers.

Posted By: Bret (OH)
Date Posted: 20 Dec 2010 at 8:55am

We recently had this problem with a Series IV. Clutch developed too much free play all of a sudden. Split the tractor and found that the release bearing lever had broken over near the pivot end. Believe it or not AGCO still had the release lever available. Good as new now.

If there are no defects to the clutch mechanism you may be able to lengthen the clutch release rod to cheat a little. Just have to make sure that with the increased length that the release lever doesnt hit the pressure plate when the pedal is fully depressed. You should be able to look up into the hole in the bottom of the bell housing and see what is going on.

Posted By: Rick Miller
Date Posted: 20 Dec 2010 at 7:31pm

I ran into this problem a few years ago on my Series IV, check the length of the splined hub in the center of the clutch disc my replacement was about 1/4 in. longer and bottomed out against the flywheel, clutch would not release.

Posted By: DrAllis
Date Posted: 20 Dec 2010 at 7:46pm

A genuine series 4 clutch disc hub is machined off that 1/4 inch on the rear side. You can use a series 4 clutch disc on any older D17, but you cannot use an older D17 clutch disc on a series 4.