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John Deere Tractors Discussion Forum
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JD A clutch draggin

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john dear

05-23-2006 20:59:43




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Just put our JD A together. The clutch doesn't want to release. Most parts inside are new including the bearing / race and bushing. Flywheel has .015" clearance. Odd thing is when the motor isn't running and the clutch released you can turn the belt pulley by hand rather easy. When running the belt pulley drags on and makes it very hard to get out of gear. Ideas?

Thanks,




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buckeye al

05-24-2006 14:43:14




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 Re: JD A clutch draggin in reply to john dear, 05-23-2006 20:59:43  
One often overlooked part is the three springs that push the outer ring and the pulley apart when in the disengaged mode!

If you've replaced these springs, forget I replied. If not, suggest you compare one of yours to a new one from Deere. You may be amazed how much of the original spring has "disappeared" over the years. New springs can make quite a difference in how quickly and completely the clutch disengages!

Pulley brake adjustments can make some of the troubles seem to go away but if these springs don't do their job, the pulley brake (and the pulley face) wear out fast because they're always fighting the engine!

Later.

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msb

05-24-2006 07:11:45




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 Re: JD A clutch draggin in reply to john dear, 05-23-2006 20:59:43  
Recheck your 3 adjustment nuts.If one is too tight the clutch will drag.



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Mike M

05-24-2006 04:39:06




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 Re: JD A clutch draggin in reply to john dear, 05-23-2006 20:59:43  
Those A's are noted for very little clearance behind the pulley assy. How much extra space do you have between the end of your crank and the end of the clutch driver disk ? Flush is too far, 1/4" in to the end of crank may be ideal when new.If worn these go on too far and cause binding.



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johndear

05-24-2006 20:03:16




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 Re: JD A clutch draggin in reply to Mike M, 05-24-2006 04:39:06  
I'll try to look this weekend but if memory serves me correctly (seldom does) the clutch driver is about flush with the end of the crank. I suppose that will mean a new driver or some creative use of shim stock? No doubt the clutch hub does not move in and out much if at all when the clutch is released. My other Deeres have noticable movement when released. A little extra flywheel clearance should also give more room for the inner disk but I hate to go way over what is recommended. Another 'poor man's solution' might be to machine .050" off the inside of the driver?

The brake is adjusted up almost too tight. It takes a good bit of pressure on the clutch handle to stop the belt pulley. No doubt the motor is pulling on the clutch, not just coasting.

Springs aren't new but seem to be rather stiff still. Three nuts tightened with the clutch locked in with a torque wrench to 50 ft lbs then backed off 1/4 turn or so each. At least in theory they should be balanced.

Thanks for the information.

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Mike M

05-25-2006 04:53:50




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 Re: JD A clutch draggin in reply to johndear, 05-24-2006 20:03:16  
I have had to turn some off of the inside surface to get some to work before. I have also made a formed shim out of a tin can. I have also used those "so called undersized drivers" and have not been able to prove them to be undersized as they measured the same as a cheaper from another source std. one.

If your splines are good and it is tight but about flush them turning some off the back may be the best choice.

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BushogPapa

05-23-2006 22:36:13




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 Re: JD A clutch draggin in reply to john dear, 05-23-2006 20:59:43  
DDo you have the clutch brake set to stop the pulley..?? Sounds like it is not set properly..



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