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    John Deere 690B high idle when hot

    Got it. Thats what I needed to know. The middle adjustment screw on the left side of the injection pump needed to be backed out by about 3/4 turn. The service manual makes no mention of this or of the top screw which controls idle speed. There is a good Youtube video explaining. Thanks for the...
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    John Deere 690B high idle when hot

    Hi everybody, maybe someone has had the same problem and can help me with my John Deere 690B with a 6404T engine. Ive owned this machine for over a year and done some repairs and overlooked some to save money. While running this excavator I notice that when the engine is up to operating temp I...
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    Flywheel coupler for John Deere 690b

    Ive realized the hour meter sometimes doesnt work but Im sure Ive got over 40 hours on the machine since having it apart. I had to replace a couple hoses in the summer but other than that its still going well.
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    Flywheel coupler for John Deere 690b

    We drilled out the holes back in the end of April and I cant remember the drill size. The bottoms were made flat at a depth of 3/4" with a woodworking bit that was laying around. It was not easy because we had to keep the hole center with the rubber flexing while drilling. The coupling was...
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    Flywheel coupler for John Deere 690b

    Thanks hosspuller. Thats a good point. I could see a drill grabbing at those very easily. Going to be real careful but might wind up cussing up a storm.
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    Flywheel coupler for John Deere 690b

    Looks like I found something that will work. Part # LCR 400 800 135A made by Deltaflex of Racine, WI. I bought it through their distributor, Mid Atlantic Rubber Co. in Baltimore. They are great to work with and only charged $150 for the part. John Deere part #s for the coupler are AT 50733 or AT...
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    Flywheel coupler for John Deere 690b

    I tried to drill out the broken bolt with left handed drill bits but one broke off. The flywheel and housing were moved forward and 2 nuts were used on exposed threads then backed out the broken bolt. The crank seal was also replaced with NOS john deere part # RE17352 I found on ebay. I...
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    Flywheel coupler for John Deere 690b

    Thank you Mg, the splined hub is still ok. Im looking for the part that is sandwiched between that part and the flywheel. #8. Also, I one of the bolts, #6 it was broke off in the crank, but I know I could get a generic 1/2" bolt when I get the stud extracted.
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    Flywheel coupler for John Deere 690b

    Hello all, Im new to the forum and was wondering if someone can help to locate the rubber driveline coupling for a 690b excavator. It is no longer available from John Deere and I cant find it at any salvage yard. The main pump was leaking and must have degraded the rubber over the years. Im...
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