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John Deere Tractors Discussion Forum
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4640 quad range

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arledge

11-03-2005 15:03:51




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hi, 4640 has started popping out of b range while drilling wheat. usually happens at the end when dropping from 2 to 1 will kick out of b and be between b and c any ideas where to start looking for the problem. thanks




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Kent Petersen

11-03-2005 19:20:22




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 Re: 4640 quad range in reply to arledge, 11-03-2005 15:03:51  
check the free play on range shifter arm it should be .01 to .03 if louse it lets shifter cam move in and away from spring loaded paw



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N. TX Tim

11-03-2005 18:37:46




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 Re: 4640 quad range in reply to arledge, 11-03-2005 15:03:51  
This was happening on my 4430 w/QR. The first thing to check is the spring right above the axle (underneath the cab) on the right side. The spring could be broken/missing or weak. I replaced the spring and it fixed the problem. Found out later when I had the tractor split to fix the 2 speed that the right front cab bolts were also sheered off. Something like this can affect it staying in range...as well as worn cab mounts. From what my mechanic said, it is usually one of the above problems and not anything major.

Hope this helps...

Tim

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