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Allis Chalmers Discussion Forum

WD-45 Engines

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11-13-2003 12:35:13

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Are there two different motors in a 45, if so how do you tell the difference? THANKS

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11-14-2003 08:51:56

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 Re: WD-45 Engines in reply to Otis, 11-13-2003 12:35:13  
My question was about gas motors, the guy at the parts house said there was two gas motors for a WD45. He could have been confused.

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11-14-2003 15:12:48

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 Re: Re: WD-45 Engines in reply to Otis, 11-14-2003 08:51:56  
as John said there were changes to the basic engine used in the WC- WD- WD45 then the D17 as time progressed. YOu give him the serial number and there should be no problem. Is possible to find a WC with a D17 engine, and maybe vice versa, but i would doubt it. Go by serial numbers.

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Kurt : Ky

11-13-2003 15:34:28

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 Re: WD-45 Engines in reply to Otis, 11-13-2003 12:35:13  
226 gas and i believe a 230 diesel. i know it had a diesel option not quite sure on the cubic inch.

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11-13-2003 17:11:59

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 Re: Re: WD-45 Engines in reply to Kurt : Ky, 11-13-2003 15:34:28  
The diesel engine was the Buda 6B230. The same engine that was used in the Cockshutt 40.

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Dave Wi.

11-13-2003 15:30:21

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 Re: WD-45 Engines in reply to Otis, 11-13-2003 12:35:13  
yep,one gas and one deisel,gas 4 cyl.,deisel 6 cyl.

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Bryan Smith

11-14-2003 12:32:37

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 Re: Re: WD-45 Engines in reply to John (C-IL), 11-13-2003 13:49:03  
Now let me add fuel to the fire - weren't there "GA" and "PA" serial number suffixes on WD-45 motors? Or not? I know there were two different suffixes on WD motors (201 CI), one was supposed to be a 5.5:1 compression ratio and the other was a 5.75:1 compression ratio, both were gasoline models (not a tractor fuel version - the compression on it was around 4.75:1, right?). OK< fire away ....!

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John (C-IL)

11-14-2003 16:51:25

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 Re: Re: Re: WD-45 Engines in reply to Bryan Smith, 11-14-2003 12:32:37  
Bryan, Correct you are oh observant one. My owners manual says 2 different compression configurations. 6.5:1 (gasoline) and 4.75:1 (Low Octane fuel). There is also a picture of the 2 different manifolds. But as far as the mechanicals the engines are the same with the noted exception of the pistons and the manifolds.

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Brian G. NY

11-14-2003 18:18:26

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 Re: Re: Re: Re: WD-45 Engines in reply to John (C-IL), 11-14-2003 16:51:25  
The WD engine suffixes were "KA" low compression and "PA" high compression while The WD-45 suffixes were "K" low compression and "G" high compression. The K & KA quite obviously stand for Kerosene (tractor fuel) and the G fits Gasoline quite nicely. What the PA stands for, I never quite understood.

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Dave Wi.

11-15-2003 05:14:19

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 Re: Re: Re: Re: Re: WD-45 Engines in reply to Brian G. NY, 11-14-2003 18:18:26  
Maybe propane?

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Bryan Smith

11-17-2003 07:03:19

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 Re: Re: Re: Re: Re: Re: WD-45 Engines in reply to Dave Wi., 11-15-2003 05:14:19  
Here's something Ed sent me some time back - see if it follows along (for a WD) with what you guys know:

"Original gas motor for WD had GA suffix and was 5.5:1 compression (yes that low - that was before they had decent octane); In mid-1951 as I recall - at motor s/n 283022, they changed to the PA suffix which was 5.7:1. The K or KA suffix as I recall was in the high 4's say 4.7:1 maybe to burn distillate (kerosene) fuel."

Ed's done a lot of work on this kind of stuff and knows his numbers - he tries to keep a running track of engine serial numbers vs tractor serial numbers (some curves of his work on my website - link below). I doubt that a 226 ci gasoline WD45 engine had two different compression ratios, but it looks like the 201 ci gasoline WD engine did. Hmmm .....

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