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Primos75 View Drop Down
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Joined: 08 Aug 2022
Location: North carolina
Points: 26 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Primos75 Quote  Post ReplyReply Direct Link To This Post Topic: Part numbers
    Posted: 29 May 2025 at 9:29pm
Hello all, so in looking at my manual it gives me a 4378031 part number for a copper washer for the injectors on my hd6. The only thing I can find online is a 74378031 number on agkits website. Looks like the same part but says it's for a 6120T engine which mine is not. Seems like I remember reading here somewhere that they started putting a 7 before the part numbers some years ago. I can't remember. Any ideas? Any substitutions? Thanks
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Joined: 03 Aug 2010
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Points: 498 		Post Options Post Options   Thanks (0) Thanks(0)   Quote HD6 Merv Quote  Post ReplyReply Direct Link To This Post Posted: 30 May 2025 at 3:03am
yes AC numbers need to be of a 8 digit configuration, and this usually involved putting a 7 or 70 in front of number 
tits tyres and tracks

they all cost you money
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Joined: 23 Dec 2020
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Points: 2458 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Codger Quote  Post ReplyReply Direct Link To This Post Posted: 30 May 2025 at 3:22am
74378031 is a number for a fuel injector copper "gasket" in the book for the Allis engine.
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Joined: 08 Aug 2022
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Points: 26 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Primos75 Quote  Post ReplyReply Direct Link To This Post Posted: 30 May 2025 at 9:06am
Ok, I thought I read that here somewhere. Thanks. Now if I could find them somewhere for less then 22 dollars a piece that would be great..lol. seems a little high for a penny sized washer. I've looked trying to find one similar but no luck yet.
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Joined: 23 Jan 2010
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Points: 1186 		Post Options Post Options   Thanks (0) Thanks(0)   Quote AC Mel Quote  Post ReplyReply Direct Link To This Post Posted: 30 May 2025 at 9:32am
They are available from Minparr...for 16.23 ea. I recently ordered 2 sets....happy to still be able to get them.
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Joined: 08 Aug 2022
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Points: 26 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Primos75 Quote  Post ReplyReply Direct Link To This Post Posted: 30 May 2025 at 9:51am
Thank you, that's why I like this group. Full of info and willing to help. 6 dollar cheaper then what I have found. Ordered 4.
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Joined: 23 Jan 2010
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Points: 1186 		Post Options Post Options   Thanks (0) Thanks(0)   Quote AC Mel Quote  Post ReplyReply Direct Link To This Post Posted: 30 May 2025 at 11:39am
Tim....good for you!...I also have a Master Numerical Idex for Allis Chalmers part numbers that shows numbers that have changed, It helps occasionally... there are numbers that have been changed that may show up at Minparr....anybody's welcome to bounce numbers of me to see if they've changed...As Merv says it needs to be a 8 digit  number...starting with 7.
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Joined: 08 Aug 2022
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Points: 26 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Primos75 Quote  Post ReplyReply Direct Link To This Post Posted: 04 Jun 2025 at 5:09pm
Thanks again. I do have a question about the orientation of the washer though. Of course the ones I removed were flat. The ones I recieved yesterday are dished. Which way do they go on? My manual doesn't specify?
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Joined: 08 Aug 2022
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Points: 26 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Primos75 Quote  Post ReplyReply Direct Link To This Post Posted: 06 Jun 2025 at 3:16pm
Dish down as a upside down bowl or dish up
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Joined: 16 Jan 2013
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Points: 8738 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Mikez Quote  Post ReplyReply Direct Link To This Post Posted: 06 Jun 2025 at 7:35pm
Didn’t have something to do with making all the part numbers eight digits to be entered into computer system. Which was around 1985 when DA bought them out
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Joined: 08 Aug 2022
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Points: 26 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Primos75 Quote  Post ReplyReply Direct Link To This Post Posted: 08 Jun 2025 at 10:30pm
Nobody has any ideas on the orientation of the washer?
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Points: 994 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Ian Beale Quote  Post ReplyReply Direct Link To This Post Posted: 09 Jun 2025 at 1:19am
Might stir an argument but I doubt it matters if it is going to be squashed flat when the injector is tightened down.
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Joined: 23 Dec 2020
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Points: 2458 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Codger Quote  Post ReplyReply Direct Link To This Post Posted: 09 Jun 2025 at 6:41am
I typically purchase "Dead Soft" copper sheet and make my own if not supplied with a rebuilt set of injectors. Have used this for years in the application:
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Joined: 08 Aug 2022
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Points: 26 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Primos75 Quote  Post ReplyReply Direct Link To This Post Posted: 16 Jun 2025 at 7:14pm
Thanks. I ended up ordering them. Already installed
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