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Tractor Talk Discussion Forum

Jd 2840 pto control valve springs

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Author  [Modern View]
Gieryic

01-13-2021 20:28:47




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I posted a question about the springs on a jd 2840 pto control valve in the restoration section. If you have any knowledge of symptoms of the springs being reversed, please provide guidance here or on the other post

Pto engaged all the time....




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Gieryic

01-15-2021 16:07:25




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 Re: Jd 2840 pto control valve springs in reply to Gieryic, 01-13-2021 20:28:47  
Quoting Removed, click Modern View to see







The attached photos are not in order
The black shaft with orange rod is the engage/disengage. Up to engage - shown disengaged

The green vertical rod with the jog in it is below the operating platform looking back on the left side of the tractor if you were sitting on it. The vertical steel

Plates are the covers for the control valves

Last - the exploded view is from the tech manual

Respectfully - you may be referencing the main clutch control valve vs the pto control valve.

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Tx Jim

01-15-2021 06:16:48




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 Re: Jd 2840 pto control valve springs in reply to Gieryic, 01-13-2021 20:28:47  
I sold new 2840's & don't remember a different type pto clutch control mechanism. Can you please post a photo of your tractor's pto control lever or the exploded view you referred to?



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Gieryic

01-15-2021 05:38:24




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 Re: Jd 2840 pto control valve springs in reply to Gieryic, 01-13-2021 20:28:47  
I agree with the plan but the control valve is different. Mine is vertical and mounted on the right side of the transmission (under your right foot while sitting).
I have an ancient exploded view - anyone have something clear as Id like to have the parts/gaskets on hand before going in.....

An entire used but functional valve would be great
Thanks



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buickanddeere

01-15-2021 05:26:15




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 Re: Jd 2840 pto control valve springs in reply to Gieryic, 01-13-2021 20:28:47  
Make sure the plug #12 is secure . The valve pushed the plug out on my tractor and she was drooling oil .



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Tx Jim

01-15-2021 04:00:26




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 Re: Jd 2840 pto control valve springs in reply to Gieryic, 01-13-2021 20:28:47  
You need to remove pto control cover(key 4) in an attempt to determine why pto lever won't stay engaged. My guess is shift fork(key 9) is the problem.



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Gieryic

01-14-2021 19:01:58




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 Re: Jd 2840 pto control valve springs in reply to Gieryic, 01-13-2021 20:28:47  
Shes free. 2x4 did the trick.

Previous owner confirmed it spins without load but with some load doesnt spin due to resistance

Spins with pto engaged but handle doesnt stay up.



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buickanddeere

01-14-2021 12:00:53




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 Re: Jd 2840 pto control valve springs in reply to Gieryic, 01-13-2021 20:28:47  
Operators of high inertia loads are commonly the demise of PTO brakes . The PTO is engaged with the engine at full rpm . Then the operator flips the PTO lever to off . That little bitty PTO brake is awful hot, long before the PTO stops turning .



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Tim S

01-14-2021 04:48:33




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 Re: Jd 2840 pto control valve springs in reply to Gieryic, 01-13-2021 20:28:47  
Strong chance your PTO clutches are gualded together,or a failed PTO brake,,on a 2840 it could ,and probably is both..



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Gieryic

01-14-2021 04:50:36




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 Re: Jd 2840 pto control valve springs in reply to Tim S, 01-14-2021 04:48:33  
Thanks. I was hoping it was simple. Oh well



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Tx Jim

01-14-2021 03:55:15




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 Re: Jd 2840 pto control valve springs in reply to Gieryic, 01-13-2021 20:28:47  
Welcome to YT
Have you attempted stopping spinning pto by CAREFULLY placing a 4 ft 2x4 between drawbar & pto shaft to determine if shaft will stop spinning?? My 1st guess is pto mechanism isn't installed correctly in pto control valve piston.



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Gieryic

01-14-2021 04:52:16




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 Re: Jd 2840 pto control valve springs in reply to Tx Jim, 01-14-2021 03:55:15  
Iíll try the 2x4 tonight. Carefully...



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svcummins

01-14-2021 00:32:11




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 Re: Jd 2840 pto control valve springs in reply to Gieryic, 01-13-2021 20:28:47  
I donít know but thereís a lot finer John Deere mechanics on here beside me that Iím sure do



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