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JD690B Excavator 2-speed walk problem

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SL

05-15-2003 12:03:41




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My JD690B has 2 speed on its walk (track) speed, but it ocassionally quits working on the higher speed and it may work again the next hour! What seems to be the problem? Could this be a solenoid problem? if so where is the solenoid located? Can someone help? All suggestions will be greatly appreciated.
Thanks.




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G-MAN

05-15-2003 13:51:36




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 Re: JD690B Excavator 2-speed walk problem in reply to SL, 05-15-2003 12:03:41  
It's been a long time since I played with one of those (back in tech school), but if the two-speed is electrically controlled, then I'd say that you're probably looking at a solenoid or solenoid circuit issue. I would assume that the solenoid is somewhere on the ground-drive pump, and probably controls the ange of the swashplate in some manner - either by direct-action, or by controlling pilot oil to a swashplate controller. It shouldn't be too hard to locate. Once you find it, check the connection at the solenoid itself and start tracing the wire back toward the switch. If it's not working, you might try running a jumper wire to the solenoid to see if that makes it work. If it does, then you know the solenoid is okay and that it's probably a problem in the wiring somewhere. It could be anywhere between the switch and the solenoid. Good luck with your excavator.

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