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Discussion Boards > Active Subjects > Messages as Posted > Tractor Engine Repair Rebuild Forum

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 09-02-2001, 20:01 Post: 31520
Mickey Grider



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 sticky foot throttle

ironic isint it, after participating in the discussion concerning hand or foot throttle i found my foot throtle acting funny today. almost like a spring was missing. i isolated the linkage and it is fine. the problem seems to be at the injector pump. the lever on the pump will not return to idle with out help. i have a kioti 3054, but the pump looks pretty much like the one on my mack only smaller. anyone have an idea about how to free up the action of the throttle control before i seek out a repair person?






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 09-02-2001, 20:08 Post: 31521
james mills



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 sticky foot throttle

sorry mickey i dont know why my posts continue to come up with your name. for all of you its woodmills1 that is james mills with the kioti with a sticky throttle






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 09-03-2001, 08:42 Post: 31530
TomG

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 sticky foot throttle

I guess that the engine will not return to a slow idle unless the throttle rod is moved by manually. I wonder if the engine will return to a slow idle if the throttle is used to increase and then decrease rpm.

For thinking about the problem, you might consider that most throttle rods (hand as well as foot) adjust spring tensions that hold the governor weights in. When the weights rotate, centrifugal force swings them out against the spring tension. As the weights move out, they operate rods and levers that reduce injector pump displacement. Consequently the amount of fuel injected is reduced. RPM in a diesel is dependent only on load and fuel delivery. Diesel engines don't have throttle valves. Setting a low idle rpm means reducing spring tension in the governor. The weights then will swing out to reduce fuel delivery at lower rpm's. The reason for all this explanation is to recognize that there are a number of springs in the governor, and there also are levers, mounting points and quite a few things that could hang up the governor and make for unreliable returns to slow idle speeds. Some springs may be external and easily replaceable if they can be identified (probably need a manual). I donít to be discouraging, but the pump and governor on my Ford are one unit. The repair manual says the unit is not serviceable except by trained technicians, but I'm also aware that some owners do their own pump/governor work. I probably wouldn't tackle nothing but the linkage and external parts myself. I would see disconnect the throttle linkage at the control lever to see if there is free movement over itís entire range.

I also wonder if the engine has a kill switch that operates a fuel shut-off solenoid or putting the hand throttle to minimum shuts down engine. I think some engines have shut-off solenoids and some don't. I wonder this because I guess it's possible for a faulty governor to prevent slow idle speeds, but the engine could still be shut down with a kill-switch.






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 09-04-2001, 05:55 Post: 31546
james mills



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 sticky foot throttle

by disconnecting all the linkage i found that the problem is at the pump, now i need to find out if it is the lever attached to the shaft or it is inside the pump. i will let you know how i make out.






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Discussion Boards > Active Subjects > Messages as Posted > Tractor Engine Repair Rebuild Forum

Thread 31520 Filter by Poster:
james mills 2 | Mickey Grider 1 | TomG 1 |




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