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Dozer 
Orange Level
Joined: 16 Aug 2011
Location: SW New York
Points: 689
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 Topic: Detroit Diesel injectors
Posted: 19 Dec 2016 at 7:22am |
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As a winter project I decided to clean and rebuild injectors for my HD5.
I recall instructions and pictures in Allis Chalmers literature that I no longer have. I am particularly interested in testing the spray pattern of the injector. If anyone is able to scan and email this information I appreciate it. ghausner@mail2george.com
Local snow required that I use my HD6G to pull my car up my driveway to the road. My 4x4 could not do it.
Merry Christmas
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darrel in ND
Orange Level
Joined: 22 Nov 2009
Location: Hebron, ND
Points: 8633
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Posted: 19 Dec 2016 at 7:29am |
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So, ole Shameless machine is reaching out far and wide, eh. I may have that info for you. If I don't, there is a very good chance that Coke will have it, and I am sure that he will have a much easier time knowing how to electronically getting it to you than I will. Darrel
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Coke-in-MN
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Joined: 12 Sep 2009
Location: Afton MN
Points: 41568
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Posted: 19 Dec 2016 at 8:45am |
Somewhere here I may have the info - I found a trucking company I plowed snow for also had a account with a authorised DD rebuilder - had mine rebuilt and tested there - cheaper than I could work on them . See if i can find the injector literature - no promise
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Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something.
"Challenges are what make life interesting; overcoming them is what makes life meaningful."
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DMiller
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Joined: 14 Sep 2009
Location: Hermann, Mo
Points: 31061
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Posted: 19 Dec 2016 at 1:35pm |
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Need a lapping block for the internal parts, extremely fine lapping compound and then a test bench that can achieve 1200-2500psi for the discharge on the nozzle tips. Not something for a home garage but a certified repair office. Most diesel fuel injection service companies can rebuild and test DD unit injectors.
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dustydoo
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Joined: 22 Jan 2014
Location: erie pa
Points: 91
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Posted: 19 Dec 2016 at 6:20pm |
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Not sure how far you are from Erie pa.! Beatty Diesel may be able to take care of them for you
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Eric B
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Joined: 09 Feb 2012
Location: British Columbi
Points: 935
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Posted: 19 Dec 2016 at 6:23pm |
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Aside from the fulfillment of mastering the injector work yourself you can buy rebuilt injectors so cheap for Detroit you may not want to fool with it yourself. I don't know if there is a cheaper injector to be bought than for the old Detroits. When I bought my last set I was offered ones with 9 spray holes instead of 5. Better performance and a little less fuel consumption. I would go that route again. I don't know if they are available for smaller series Detroit but mine were for the 92 series.
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Currently- WD,WC,3WF's,2 D14's B. Previously- I 600,TL745,200,FL9,FR12,H3,816 LBH. Earth has no sorrow that Heaven cannot heal!
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Coke-in-MN
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Joined: 12 Sep 2009
Location: Afton MN
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Posted: 19 Dec 2016 at 9:23pm |
I had mine rebuilt and last time through that dealer they were $32 - normal price was about $65 - was looking at a site said exchange for $125 (seems rather high) One thing the DD shop said was replace the fuel lines every time you work on injectors - they seem to crack at the flare if over tightened or wrenched on and off a few times . (believe it's 15 ft pounds on nut)
I had one crack at flare - kind of dilutes the oil fast .
Edited by Coke-in-MN - 19 Dec 2016 at 9:25pm
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Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something.
"Challenges are what make life interesting; overcoming them is what makes life meaningful."
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Dozer
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Joined: 16 Aug 2011
Location: SW New York
Points: 689
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Posted: 20 Dec 2016 at 7:45am |
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It is something I want to do. Rebuilt Detroit injectors ($65 to $125) are less expensive than many. I have 14 core injectors to experiment with. I did inquire about newer injectors than HV6's and HV7's but my inquiries didn't yield any results. My thanks to all.
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SteveM C/IL
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Joined: 12 Sep 2009
Location: Shelbyville IL
Points: 8239
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Posted: 24 Dec 2016 at 3:52pm |
 Coke-in-MN wrote:
I had mine rebuilt and last time through that dealer they were $32 - normal price was about $65 - was looking at a site said exchange for $125 (seems rather high) One thing the DD shop said was replace the fuel lines every time you work on injectors - they seem to crack at the flare if over tightened or wrenched on and off a few times . (believe it's 15 ft pounds on nut)
I had one crack at flare - kind of dilutes the oil fast .
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Never replaced any lines and never had one crack but only torqued to 15,which seems excessive when pulling that wrench.Was told over tightening was cause of cracking.
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