Welcome! Please use the navigational links to explore our website.
PartsASAP LogoCompany Logo (800) 853-2651

Shop Now

   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver

Attention Forum Users: On the 28th of December 2023 at 9:00am Central Time, we will be taking the forums down for maintenance while we prepare the new forums for your use. Please click here for more information.

Discussion Forum
:

Clutch/belt pulley questions on 720

Welcome Guest, Log in or Register
Author 
Kevin

01-03-2002 08:37:27




Report to Moderator

I have a 720d. When you ingage the clutch, the belt pulley slides outward about an inch. The clutch is real "grabby" also. I have had the pulley and clutch off. I can't see what would be worn. Any ideas would be appreciated.
Thanks
Kevin




[Log in to Reply]   [No Email]
mrm

01-05-2002 05:46:51




Report to Moderator
 Re: clutch/belt pulley questions on 720 in reply to Kevin , 01-03-2002 08:37:27  
don't forget to look at the splines in the clutch drive disk and on the crank rh side it could be shot. Welcome to the wonderfull world of two-cyl
diesels,where they run no matter how bad they are
falling apart!!! Those two-cyl. diesels can pull
anything you hook to them including the pages of
your check book!!! Good Luck and have fun and try
to fix it right so many people just cob job.You
reap what you sow.

[Log in to Reply]  [No Email]
Donwisc

01-03-2002 19:37:06




Report to Moderator
 Re: clutch/belt pulley questions on 720 in reply to Kevin , 01-03-2002 08:37:27  
Had the same problem on a previous 730 D where I had about 1/2 inch play. It would try to pop a wheely no mater how I feathered the clutch. The thrust washers behind the flywheel had to be replaced.

The current 730D I have has about 3/16 end play measured at the flywheel. Flywheel is a taperlock, and Im preparing to change thrust washers on this one too.

Try this check, tractor not running, shifter in neutral, engage clutch, measure end play at flywheel. should only be .004 thou when new

Good luck Don

[Log in to Reply]  [No Email]
Dave 2N

01-03-2002 14:39:07




Report to Moderator
 Re: clutch/belt pulley questions on 720 in reply to Kevin , 01-03-2002 08:37:27  
Check with Clooney but based on the help he gave us with our 70, my first step would be to check to make sure that the fly wheel is tight.



[Log in to Reply]  [No Email]
ChuckW

01-03-2002 13:58:08




Report to Moderator
 Re: clutch/belt pulley questions on 720 in reply to Kevin , 01-03-2002 08:37:27  
there is a thrust washer on the inner case...about 1/4" in width, suppose there is a possibility it is gone.



[Log in to Reply]  [No Email]
ChuckW

01-03-2002 11:08:38




Report to Moderator
 Re: clutch/belt pulley questions on 720 in reply to Kevin , 01-03-2002 08:37:27  
sounds like your crankshaft is also moving, better check and make sure you flywheel is tight. Disengage clutch and if you can push the center towards the tractor then the flywheel is loose. Loosen up the clutch disc and tighten flywheel then readjust the disc.



[Log in to Reply]  [No Email]
Frank

01-03-2002 12:58:52




Report to Moderator
 Re: Re: clutch/belt pulley questions on 720 in reply to ChuckW, 01-03-2002 11:08:38  
Wow ! If he's got that much endplay, and some of it is coming from the flywheel side, he might have damaged the thrust washers behind the cover behind the flywheel, also.

Frank 70D (Been there done that !)



[Log in to Reply]  [No Email]
Kevin

01-03-2002 18:55:11




Report to Moderator
 Re: Re: Re: clutch/belt pulley questions on 720 in reply to Frank, 01-03-2002 12:58:52  
Flywheel is tight, Have had right side off. Crankshalf is tight. Movement is in the belt pulley assembley.



[Log in to Reply]  [No Email]
Clooney

01-04-2002 03:28:40




Report to Moderator
 Re: Re: Re: Re: clutch/belt pulley questions on 720 in reply to Kevin , 01-03-2002 18:55:11  
~Kevin, depending on if you have an early or late 720 the pulley lateral movement is controlled by the sleeve operating fork stops. The early design is by shims at the pulley brake operating pin & the later is by stop bolts on the back of the operating sleeve fork. If your 1st reduction cover has little bolt on covers on the top & bottom it is the later design. In either case you can adjust the pulley end play to an acceptable level (probably somewhere around 3/16"-1/4") by either shimming or removing the little covers & adjusting the stop bolts.
~As for the grabby clutch, the pulley end play probably isn't helping it but probably is not the (entire)cause either. Make sure the lining(s) aren't bent, glazed or oil soaked, then check the 3 adjusting bolts for step wear where they go through the pulley holes (if found either replace the bolts or file the steps smooth), then make sure the double sided disks are installed so they are driven by the drive pins & not the adjustment bolts. ~If all the above doesn't make the clutch engage better then make sure you don't have excessive wear on the operating sleeve, toggles, dogs or the dog pivot pin holes in the pulley ears & dogs aren't wallowed out & extremely sloppy

[Log in to Reply]  [No Email]
buckeye al

01-03-2002 15:25:34




Report to Moderator
 Re: Re: Re: clutch/belt pulley questions on 720 in reply to Frank, 01-03-2002 12:58:52  
Agreed! The fiber thrust washer index tab HAS to be gone & spinning which will wear the timing gear cover prematurely. Time to bare both ends of the crank, possibly remove the timing gear cover & start setting things right before the flywheel goes bad too!



[Log in to Reply]  [No Email]
[Options]  [Printer Friendly]  [Posting Help]  [Return to Forum]   [Log in to Reply]

Hop to:


TRACTOR PARTS TRACTOR MANUALS
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. [ About Us ]

Home  |  Forums


Copyright © 1997-2023 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy

TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters

Website Accessibility Policy