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John Deere 730 Diesel Throttle Troubles

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Colt Edin

09-11-2002 19:13:13

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Hey!

All throughout this last summer my dad and I have been having some trouble with the throttle on the 730. It idles, but when it is revved up or goes down a hill (even though the throttle is back to full idle on the hill) it will rev up to full operating RPM and STAY there(not over revving) no matter where you position the throttle, even if you stop at the bottom of the hill or pull the throttle back after working it. The only way to get the speed back down to an idle is to load the engine down by popping the clutch ahead a few times in neutral or lugging the engine a bit by slipping it in a high gear for a few seconds. Does anybody know what is going on? We've had the governor out (nothing messed up in there) and the racks appear to move fine when the throttle is moved ahead/back. Does anybody have any ideas what is going on here or how to fix it?

Thanks a bunch!

Colt

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Clooney

09-12-2002 03:48:59

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Re: John Deere 730 Diesel Throttle Troubles in reply to Colt Edin, 09-11-2002 19:13:13

Colt, you are going to have to determine if the problem is governor related or pump/rack related or something else like burning crankcase oil.
~Pull the big square pump cover & make sure the pump rack isn't sticking [with the engine off watch the rack move & see if it sticks in the higher position]. Then do the same with the engine running. If the rack seems to work freely & doesn't stick, make sure the governor linkage between the governor & rack isn't binding & the governor end tail is in the slot inside the governor. ~If you have a pony start I hope the problem isn't in the actual governor as it is a real time consuming & pain to remove the governor on a pony 720-730.
~My suggestion would be to either get a Deere manual or I&T manual that covers Deere's diesels & go through the adjustment of the rack & governor linkage step by step to see if you can find the problem..

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