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Case Tractors Discussion Forum

VAC Governor Hunting Problem

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Eric F.

03-20-2006 12:48:38

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All,

When I throw the fuel to the tractor, the governor "hunts" for about 10-20 seconds. It is making some major rpm swings during this time. If I slowly adjust the throttle, it is smooth. I tried to work it out with the carb, but it won't solve it.

Is this a governor linkage adjustment (I haven't touched it...I promise), a distributor problem? I'm stuck.

Thanks,
Eric

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Gene dotson

03-21-2006 15:34:08

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Re: VAC Governor Hunting Problem in reply to Eric F., 03-20-2006 12:48:38

Eric;
Before you go any farther, check the adjustment on the linkage from the governor to the carburetor. With the throttle wide open, you should have 1/16 inch between the throttle arm and the stop pin on the carburetor... Gene

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Eric F.

03-22-2006 04:49:56

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Re: VAC Governor Hunting Problem in reply to Gene dotson, 03-21-2006 15:34:08

Gene & Tom,

I think it's OK now. I noticed that I did have a lot of slop in the rod between the governor and the carb. I replaced my M/S carb last year (the previous owner had the wrong carb installed). I replaced with a Zenith, so I don't think the lengths matched what Tom mentioned. I lengthened the rod, secured the jam nuts and lubed the throttle rod. It worked fine, but backfired at high rpm, opened the main jet 1/4 turn, and sounds good. I don't know why this was not a problem last year. Thanks for the help.

Eric

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TomVAC

03-20-2006 18:00:31

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Re: VAC Governor Hunting Problem in reply to Eric F., 03-20-2006 12:48:38

Eric, had same problem. VAC would hunt until motor was put under load using brakes etc. Replaced pivot shaft and bearing was badly wore. Also replaced governor flyballs, had flat spots. Any slop or binding in linkage etc. will give you trouble.

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Eric F.

03-21-2006 06:46:22

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Re: VAC Governor Hunting Problem in reply to TomVAC, 03-20-2006 18:00:31

Thanks Tom. I'll check the shaft first before I go digging too deep. I'll bet I have some gunk between the shaft and the sleeve.

Thanks,
Eric

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