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JD B rockshaft won't go down

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Doug

11-20-2001 15:49:30




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My'48 B's rockshaft wen't up but will not go down. Tried hanging on implement and jumping up and down on it but had no luck. Could it possibly be a stuck valve in powertrol unit? Thanks, Doug




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Dan

11-21-2001 22:11:54




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 Re: JD B rockshaft won't go down in reply to Doug, 11-20-2001 15:49:30  
If it isn't the throttle valve screw it could be your by-pass valve. I had this same thing happen on my '43 B. The rock shaft would only go down when I would disengage the clutch. The by-pass valve is in the valve housing and is the one that follows the cam. Mine was just stuck from sitting for who knows how long. I pryed it loose with a scewdriver and it works fine. I guess a broken spring under the valve would do the same thing. Good luck. Dan.

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Dan

11-21-2001 22:21:48




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 Re: Re: JD B rockshaft won't go down in reply to Dan, 11-21-2001 22:11:54  
Just noticed you were talking about a powertrol and not a powerlift. Guess my last post wont apply. Sorry.



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Fred-CT

11-20-2001 19:51:26




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 Re: JD B rockshaft won't go down in reply to Doug, 11-20-2001 15:49:30  
Doug, try turning in the throttle valve screw. This is located on the lower back of the power-trol unit. It looks like a 5/8" bolt about 1.5' long. This is a cap that, when removed, exposes the screw for adjusting the speed at which the unit drops. Good luck!

FSB



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Bill Pries

11-21-2001 12:19:58




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 Re: Re: JD B rockshaft won't go down in reply to Fred-CT, 11-20-2001 19:51:26  
Yeah check the throttle valve. I had this problem with my A when I first tried to make the rockshaft work. Seemed like it wouldn't lift but in reality it was all the way up and wouldn't come down. Turning the screw in (clockwise) let it return. Good luck.



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