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John Deere Tractors Discussion Forum
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John Deere 4630 Clutch

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BMAN

05-13-2007 06:32:52




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Recently bought a 4630. The clutch seems really jerky when first engaging no matter how slow you let up on the clutch lever. Is there something hydraulic that could be causing this or is it time for a new clutch? It doesn"t seem it slip at all when pulling a load.




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bighead

05-13-2007 20:01:00




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 Re: John Deere 4630 Clutch in reply to BMAN, 05-13-2007 06:32:52  
I agree with Bob on all counts. Permaclutches definitely have a more aggressive 'feel' than most other clutches. Pressures and valve operation can be checked easily enough... but without a manual and a gauge, you're wasting time. I've run into the occasional broken spring, sticky clutch valve, or bent lever causing the clutch to act wierd. All are housed in that small valve body just behind the left front cab mount.

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Bob

05-13-2007 09:19:10




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 Re: John Deere 4630 Clutch in reply to BMAN, 05-13-2007 06:32:52  
If it's a mechtransmission with Perma-Clutch, that clutch takes some getting used to, as they tend to be a bit jerky.

With time, you will learn how to "feather" the pedal just so, so it will engage more smoothly.

On the odd chance something IS wrong, it will probably be in the clutch operating valve which is attached to the side of the tractor's main case, more or less below your left foot.

There are valves in there that control clutch pressure, and "pedal feel" as you are engaging the clutch.

A check with a pressure gauge will show if the cltch pressure is normal, and if it comes up smotthly as the pedal is released.

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Armand Tatro

05-13-2007 06:55:47




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 Re: John Deere 4630 Clutch in reply to BMAN, 05-13-2007 06:32:52  
Is it power shift or quad shift? Armand



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BMAN

05-13-2007 10:04:55




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 Re: John Deere 4630 Clutch in reply to Armand Tatro, 05-13-2007 06:55:47  
Quad Range



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