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Discussion Forum

AC engine D-17 or ?

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09-29-2002 20:23:57

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I just purchased 4 cylinder AC engine supposed to be same as D-17 , how do I tell what I have, I'm a JD guy so I don't know D-15 from D-21 thanks for any info you can give

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09-30-2002 17:03:29

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 Re: AC engine D-17 or ? in reply to mike, 09-29-2002 20:23:57  
Look at the engine serial number. On a D17, this is found on the side of the engine block near the carburetor. A D17, 170, or 175 engine will begin 17-######. A standard D17 engine will then have a suffix of M, indicating a 7.2:1 compression ratio. A 170 will be Z, indicating an 8:1 ratio, and a 175 and D17 propane engine will end in V, indicating an 8.2:1 ratio. A WD45 engine will be 45-######, and a WD or WC engine will be W-######. The early WC's had the serial number on the back side of the block above the flywheel. When installed in the tractor, it's right above the bell housing. A D17 engine has a line of cast iron around the bottom of the block on the outside to stiffen the block, and a WC or WD engine has a steel on the right side over the push rods.

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Allis Puller

09-30-2002 13:14:04

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 Re: AC engine D-17 or ? in reply to mike, 09-29-2002 20:23:57  
Ya John is definately incorrect, but I'm pretty sure that the serial # on the side of the block will start with an "F" - D-17, "AM" - "WD45", and U - "WD". Dont quote quote me completely on that D-17#, but thats what a Gleaner E starts with and they are the same motor.

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John W.

09-29-2002 22:10:13

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 Re: AC engine D-17 or ? in reply to mike, 09-29-2002 20:23:57  
Mike; O.K., The problem is, it is either a D-17 or it's not. The statement supposed to be the same as, is very misleading. 15,17,and early 21's shared a common block. The difference is in the bore and stroke, 15's being the smaller and 21's the larger of this group. Clean the accumulated grease, dirt, and gunk from the engine, there are numbers stamped into the blocks that identify what model it is. You could have a tractor engine or you may have one of the engines built for pumps and other STATIONARY equiptment. The later while being the same horse power as it's tractor brother, will not always fit, due to dementional differences on the fly wheel end where it mounts to a bell housing or pump, genarator, etc. Allis- Chalmers built a huge number of engines for uses in cotton gins, thrashers, combine aux., drives. The list is impressive. If it turns out to be a stationary engine, measure the mounting bolt spread and crank shaft center line in relation to your D-17 they could, quite possibly, be the same engine wearing different model and usage #'s. Who knows you could get a bonus of an engine with the larger bore and stroke of a D-21, It would add some more power, and more importantly get another Allis out of the weeds and into a job, B#ST#RD or not. Good Luck,

John W.

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09-30-2002 18:53:52

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 Re: Re: AC engine D-17 or ? in reply to John W., 09-29-2002 22:10:13  
Yeah, right, my D17 has the same block as the D21!Maybe if I put TWO D17's in tandem I could match the hp of a D21. I know my Deere 4240 has the same block as a 4WD 8440, but that's also why the 4WD goes through more engines than some people go through underwear! Your recent posts are total BS. I just hope the recipients realize that and get a second opinion.

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09-30-2002 15:46:57

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 Re: Re: AC engine D-17 or ? in reply to John W., 09-29-2002 22:10:13  
John W. is a DEERE man and is clueless to anything out side of Green paint. Probably sniffed to many paint fumes while JD has been wining and dining him so that Successful Farming has a sponsor and JD can spread the Green BS. If I am wrong, John W. can show all of us a D21 with a 4 cylinder 226cid from the factory. The only close bore and stroke in the Buda/AC from 4 to 6 cyl was the 2800/2900/649 301cid was shortend by 2 cyl. for the 433 200cid engine of the F2/3 and 6060-6080 tractors, exact same bore & stroke.

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09-30-2002 10:49:27

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 Re: Re: AC engine D-17 or ? in reply to John W., 09-29-2002 22:10:13  
I would like to see a D 15 with a 426 ci turbocharged deisel engine out of a D21, however a D21 with a 149 ci gas engine out of the D 15 would be a crying shame. Two totally diffrent tractors, I think you have your facts wrong.

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Your kidding right?

09-30-2002 05:58:16

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 Re: Re: AC engine D-17 or ? in reply to John W., 09-29-2002 22:10:13  
John W, I thought you had a typographical error in your post, "The 15, 17 and 21 share a common block". But after reading the entire post I realized it was intended as typed. You can't be serious,..can you? Mike, John W either has a dry sense of humor or knows nothing about A-C engines. None of models he mentions uses a commen block, and all of the D-21s used the same block. Be that as it may, find some casting numbers, or the stamped model serial number on your engine and somebody will be able to help you determine what you have. Butch (OH)

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09-30-2002 08:41:45

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 Re: Re: Re: AC engine D-17 or ? in reply to Your kidding right?, 09-30-2002 05:58:16  
Mayby,he ment WD45,D17,and170 gas shared the same block[226c.i.]mayby?

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09-30-2002 19:15:34

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 Re: Re: Re: Re: AC engine D-17 or ? in reply to Dave, 09-30-2002 08:41:45  
I see the 17 on the block , thanks for all the info, didn't want to start augument but looks like it happened, thanks again mike

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