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John Deere 4430 PTO Problem

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Shawn Fontenot

07-19-2006 12:40:16

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I have a John Deere 4430 that the PTO will not stay engauged. I have to hold the lever engauged with a strap while shredding. The PTO works fine although the lever doesnt lock in. Does anyone have any advice on what I should do to resolve this problem ?

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Tx Jim

07-20-2006 03:29:21

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lock-in arm bends in reply to Shawn Fontenot, 07-19-2006 12:40:16

To add to Bob's reply there is a part with an arm in pto clutch control valve that has been known to bend. When pto is engaged a small piston pushes this arm to lock pto in gear. Over time arm can bend. Tx Jim

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Bob

07-19-2006 13:18:43

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Re: John Deere 4430 PTO Problem in reply to Shawn Fontenot, 07-19-2006 12:40:16

There's several possibilities, and variations depending upon whether it's a power shift tractor, or not.

This advice is geared more towards non-powershift tractors, but powershifts are similar.

First of all, make sure the rod that drops down from PTO lever in the steering pedestal to the clutch/PTO valve on the side of the clutch housing is not binding at either end, preventing the PTO valve from fully engaging. (I have seen the pin in the lower clevis rust up, and cause just the problem you're havin.)

Damaged or sagged cab mounts will affect the adjustment of the PTO rod, which will affect it locking in.

Check the tranmission pump pressure, and PTO clutch apply pressure.

If all of the above check out OK, likely there is an internal problem in the clutch/PTO valve. It is not too difficult to remove for repairs.

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