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Distillate engines running on gas full time

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Bama Binder

10-07-1999 05:20:13




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Other than the compression ratio of the distillate tractors, the main difference is in manifold (and the two tanks). When converting to gas only do you need to change the manifold? I would prefer to leave all original components in place and just run on gas. Any problems with this?




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mj delaney

10-08-1999 07:52:10




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 Re: Distillate engines running on gas full time in reply to Bama Binder, 10-07-1999 05:20:13  
I converted my 50 "H" to gas only over 20 years ago. The combination manifold finally cracked so bad, I had to get a new one. The heat shield was gone too, and baffle was siezed. I purchased a used "cold" gas manifold as I didn't think I'd ever get a dual fuel model. Cost me $140.00 Canadian for a used one in good shape. The internal baffle just helped to vaporize the distillate by allowing more heat around the carb base, along with the rad shudder for hotter coolant. When I rebuilt the engine I put in domed pistons to raise the compression a little. I found there is an extra fitting in a dual fuel carb to accomodate the 1 gal fuel tank which was used for starting I am still using that carb. I often wondered if a super "H" carb would fit. I also put in a new needle and seat at that time. Like others have said I probably could just drive her away, but I believe there is a minor difference in an all gas needle. In any event I'd never burn kerosene today as long as I can get gas

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Bob M

10-07-1999 16:43:29




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 Re: Distillate engines running on gas full time in reply to Bama Binder, 10-07-1999 05:20:13  
In addition to removing the heat shield per The Red, also set the manifold heat control to the full "cold" position - providing it's not stuck. It will provide a cooler fuel/air mix to the engine = increased power and fuel economy if you intend to work the tractor.



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The Red

10-07-1999 05:47:32




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 Re: Distillate engines running on gas full time in reply to Bama Binder, 10-07-1999 05:20:13  
Bama no problem. Just throw in the gas and go. Now if you still have a heat shield in place, you might want to remove it. My H manual specifically states to remove the heat shield if running with regular gasoline.



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Phil Auten

10-08-1999 04:33:07




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 Re: Re: Distillate engines running on gas full time in reply to The Red, 10-07-1999 05:47:32  
Red,
Does the manual refer to the radiator shutters as a heat shield, or is this some other part? I'm not very familiar with distillate models and this discussion makes me curious.

Phil



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MikeH(Tx)

10-08-1999 05:20:36




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 Re: Re: Re: Distillate engines running on gas full time in reply to Phil Auten, 10-08-1999 04:33:07  
Hey Phil,

The heat shield is in the exhaust manifold, kind of like a choke on the output side. The back pressure it creates heats up the engine.

Not much use for one in Texas. Not much use for one on gasoline.



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Bob M

10-08-1999 12:33:30




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 Re: Re: Re: Re: Distillate engines running on gas full time in reply to MikeH(Tx), 10-08-1999 05:20:36  
Mike and Phil -

The "heat control" valve in the manifold does not actually increase exhaust back pressure. Instead it routes exhaust either directly up the stack (cold position) or else diverts exhaust around the intake manifold runner and then up the stack (hot position). Sorta the same idea as the old "heat riser valve" on 50's and 60's GM and Chrysler straight 6 car engines.



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Regularman

10-08-1999 09:52:22




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 Re: Re: Re: Re: Distillate engines running on gas full time in reply to MikeH(Tx), 10-08-1999 05:20:36  
Good guess Mike but not exactly correct. The heat shield refers to the tin cover that was bolted around the outside of the manifold when it was new. Most the these were either destroyed years ago from the excess heat of burning straight gas or thrown in the weeds. The idea was to retain the heat around the manifold to improve combustion when burning distillate fuels. On some models (F-20, F-30, etc.) there was a restrictor plate in the manifold but it was not called a heat sheild.

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