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'36 WC with Poor Throttle response

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10-30-2002 19:58:01

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Hi,I have a WC that has very poor throttle response from the throttle lever. I can move the throttle linkage rod freely on the carb side of the block, so it seems its at the Govenor side that is having problems, and at times the throttle will respond but most times not. The tractor has been sitting for 10yrs in a shed, and when I bought it there was baling wire from the carb linkage up to the steering wheel, so I suspect back when this tractor was parked for a long nap it had throttle response problems back then. I would enjoy hearing what might be the problem since I would have all winter to work on it and get it ready for spring :)


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Gordon in IN

11-01-2002 15:34:01

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 Re: '36 WC with Poor Throttle response in reply to Scott, 10-30-2002 19:58:01  
Two other things you can check are the clearances in all of the govenor linkage pivots and shaft bushings and check the "cam" that rides on the govenor thrust bearing (ball bearing) for "flat" spots where it rides on the bearing. When new (and working properly) these surfaces are "curved" not "flat". Good luck, Gordon

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10-31-2002 17:52:00

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 Re: '36 WC with Poor Throttle response in reply to Scott, 10-30-2002 19:58:01  
I am not claiming to be a governor expert, I am not. However I understand that worn weight pivots can cause slugish response. I would take the governor off (if there is no external cause found) and just look at the parts and see if and where any wear is. Weights are still available from AGCO (what AC has become) and I suspect other parts too. Try Sandy Lake Implement.But you do need a book. I would hold out for a reprint of an AC manual, not the ITT that may cover several models. The one I have covers Bs,Cs, Wds, CAs 45s and I don't remember what else, the AC reprint for my WD has as many pages, but all are about MY tractor, not several others too. Not that the ITT is all bad, it isn't, there is good info there too, just that the AC manual has more and in more detail.

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Gordon in IN

10-31-2002 14:12:29

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 Re: '36 WC with Poor Throttle response in reply to Scott, 10-30-2002 19:58:01  
You may want to check to see if you have an "anti-surge" spring on your govenor linkage. If you do have one, check to see if it is installed correctly. I have seen the springs installed improperly and causes a lot of the kind of trouble you are having. I like to set up the govenors on my AC WC tractors to WD specifications and without the above mentioned "troublesome" spring. I also use WD govenor spring and RPM settings if the tractor has aluminum pistons. I do not recommend the (slightly) higher RPM settings for engines with "Iron Pistons". Just my approach, good luck, Gordon

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Butch (OH)

10-31-2002 05:31:12

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 Re: '36 WC with Poor Throttle response in reply to Scott, 10-30-2002 19:58:01  
A little better explanation of what it is doing would help but I am assuming that by "poor responce" you mean the engine RPMs don't pick up when you open the throttle. Hate to sound like a broken record but get a service manual for your tractor, impossible to list all the what-ifs, what-nots and adjustments of the governor here without taking up two pages. What you need to know that is not explained real well in the manual is the basic operatiion of the governor. Two things control the speed of a your engine. 1. A spring inside the governor housing that pulls the carburetor shaft open and, 2 flyweights that use centrifugal force to work against the spring pressure and close same. On a variable speed type governor as used on most tractors the throttle lever controls the tension of the spring. When you open the throttle the fly weights must spin faster to overcome the spring. When load causes the rpm to drop the spring overcomes the weights and opens the carburetor up to maintain rpms. Knowing this and armed with a manual you should be able to figure out what is wrong with yours, Good Luck

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