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Farmall & IHC Tractors Discussion Forum
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Farmall B idling HIGH

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davset

08-26-2007 12:38:53




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Well, I got my "45 B cranked today for the first time since I got it home two weeks ago (after cleaning the (M-S) carb (It was pretty gummed up), gas tank, changing oil, plugs, etc.) ((It had been setting at the previous location for at least 3 years, so I don"t know when the last time it ran.)) I"ve got lots to do on her yet, but she"s in pretty good shape already - I just gotta get her running good. When I pushed the start lever this afternoon, she fired right up, but immediately rev"d up high. Finally got it to run pretty good with hand lever at absolute minimum (the min idle adj on carb had some small effect) but the governor still wants to creep up slowly. I can pull the governor linkage by hand to close the carb throttle and it will run OK for several minutes, then slowly creep back up. But when the hand lever is at anything other than absolute minimum, engine speed is excessive. I"m thinking I should pull the governor and clean it. What do y"all think?

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old timer

08-26-2007 17:34:27




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 Re: Farmall B idling HIGH in reply to davset, 08-26-2007 12:38:53  
im not much of a mechanic but i do know if its sucking air around the intake or anywhere for that matter it wont idle right



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davset

08-26-2007 15:00:59




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 Re: Farmall B idling HIGH in reply to davset, 08-26-2007 12:38:53  
Thanks, guys.
I tried the choke idea, but it simply choked the engine. Yes, there was a "sweet-spot" where it sort of did OK, but it was right on the hairy-edge of dying. All in all, though, it simply choked.
I checked the throttle/governor link and tweaked it a bit, but again, not much help. It is running great at idle, but, again, I"m running at the lowest speed control setting (actually, below the first notch). When set to the 1st or 2nd notch, it"ll start to run away. The governor high speed screw seemed to have little effect either. Of course, I did not adjust it much.
I had an idea that I"ll throw out. What if I was to pull that screw out and shoot some SeaFoam directly into the governor housing. Maybe even add a little extra to the crankcase, then run at idle for a while. Maybe its just gummed up. Sure would beat taking the housing off. (I remember that ball bearing from dad"s SA I did three years ago.)
I"ll be tearing this B down in a few months (it"s my winter project), but it sure would be nice to get her running good before I get too antsy about pulling parts off.

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ScottyHOMEy

08-26-2007 15:17:46




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 Re: Farmall B idling HIGH in reply to davset, 08-26-2007 15:00:59  
There's really nothing inside the governor that is going to be bothers by a little gum, so I'm thinking the Seafoam won't gain you anything there.



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Brownie450

08-26-2007 14:38:02




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 Re: Farmall B idling HIGH in reply to davset, 08-26-2007 12:38:53  
Remember --the spring opens the throttle, & the governor shuts it back down----when everything is working right.



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CityBoy-McCoy

08-26-2007 13:01:28




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 Re: Farmall B idling HIGH in reply to davset, 08-26-2007 12:38:53  
Maybe. But, maybe it is running lean, which would make it rev up. Crank it up and when it starts to rev up, pull the choke (gradually) part way out. If the rpms level off and it runs smooth, I'd be more suspicious of a lean condition. If lean, either the carb is not as clean as you had hoped, fuel flow is restricted, carb needs adjusting, or you have an air leak at the carb or manifold to head seal.
If partial choking has no effect on idle speed or if it runs rough with partial choke, I'd say then go after the governor. mike

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ScottyHOMEy

08-26-2007 13:12:20




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 Re: Farmall B idling HIGH in reply to CityBoy-McCoy, 08-26-2007 13:01:28  
Don't know what I was thinkin'. I like your idea better as a place to start, 'specially as long as it set.



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ScottyHOMEy

08-26-2007 12:58:09




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 Re: Farmall B idling HIGH in reply to davset, 08-26-2007 12:38:53  
I think you're headed the right direction.

Before you open it up, check the two relevant adjustments you can make from the outside. Ont he left side, loosen up the clevis that connnects the governor arm to the rod to the carb. Push both as far to the rear as you can, and adjust the clevis if you need to so that it all goes back together in that position. The other is to loosen the jam nut on top of the bolt on top of the governor and back the bolt out a little bit. Start the engine and, if it doesn't run righth waya from you, let it speed up some. If it's better, try backing that bolt out some more to see if it has any direct effect.

If these don't work, you'll have to open her up, Be careful at first to leave the drive gear in place. (I usually advise getting and leaving the engine at TDC, before even getting into this, and if you can't see the marks on the cam and governor gear to get them lined back up, make yourself some sort of oil-proof mark -- BUT it's easier to leave the gear in place if you can.)

You're apt to find almost anything. Could be a bad spring on the link to the arm that runs over to the carb lever. It might be a bad spring that rides inside the shaft, could be the ball bearing assembly is shot (if the spring loses tension, the races of that bearing could open up and all the little balls fall out!).

I'd be interested in knowing what you find. Keep us posted, please!

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teddy52food

08-26-2007 18:01:17




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 Re: Farmall B idling HIGH in reply to ScottyHOMEy, 08-26-2007 12:58:09  
I don"t know why you would want to adjust the parts you are talking about. These are locked in place & don"t change. I have been working on these governors all my life & never had to adjust one yet. In this case the thrust bearing is shot and your adjusting will just mess things up so when you get the worn out parts replaced you will have to adjust it all again to get back where you started. Remember the spring opens the throttle, the flyweights close it. The flyweights can"t close it if the thrust bearing is out.

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ScottyHOMEy

08-26-2007 18:29:38




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 Re: Farmall B idling HIGH in reply to teddy52food, 08-26-2007 18:01:17  
I think I also heard that the carb had been out and other stuff done, so who knows what's where. I think I also allowed as how the carb would be a better place to look first.

Going back under my rock . . .



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gene bender

08-26-2007 16:01:40




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 Re: Farmall B idling HIGH in reply to ScottyHOMEy, 08-26-2007 12:58:09  
You forgpt tp tell him unhook clevis with engine off after unhooking clevis open throttle then adjust clevis soo the pin goes in.



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ScottyHOMEy

08-26-2007 18:41:44




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 Re: Farmall B idling HIGH in reply to gene bender, 08-26-2007 16:01:40  
Excellent point, Gene. My mistake with apologies.

davset please take note.



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