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Thread: Conventional Alternator Bracket for NHC-250, Cummins p/n

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    4 Star General 74M35A2's Avatar
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    Default Conventional Alternator Bracket for NHC-250, Cummins p/n

    Due to the sudden popularity of my 130 amp 24v alternator, I have investigated and found the "civilian" alternator bracket mount for the Cummins 855/NHC-250. It is Cummins p/n 218505. This is the lower mount that bolts to the block via 3 fasteners. This bracket will/should adapt a standard J-180 "short" type alternator to the engine, properly. These are the common Delco clone alternators sold on the internet and by some members/vendors here, and can be had as low as $89. This bracket will/should also fit the J-180 130A unit I also sell. This bracket as new from Cummins is in the $200 price range, but I have found it for about $45-$75 range from used truck parts yards. This bracket also fits the Cummins N14 engine, so that helps to source more of them. A few people have been mounting J-180 short alternators on the J-180 long mount without issue, and they use 2 separate bolts on the mount and a 2" long piece of spacer pipe on the rear most leg to take up the room. Don't just use a long single bolt with no spacer to put a J-180 short onto a J-180 long bracket, as if you tighten it you will pull both alternator ears together and snap one off. Visualize what will be tightening against what before you spin wrenches, if adapting to "incorrect" bracketry. If you have the 6CTA8.3 engine, here is this info suited to you: http://www.steelsoldiers.com/showthr...or-Bracket-P-N
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    Last edited by 74M35A2; 02-09-2016 at 16:08.
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    4 Star General 74M35A2's Avatar
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    I saw TM America is fabbing alternator brackets for various engines. Not sure if can be purchased separately. Work looked good in the "What Do You Build?" section.
    CFO @ Portacharger

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    4 Star General juanprado's Avatar
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    Thanks for the information and research!

    Is the top bracket the same for the aftermarket alt or does that need to be changed also?
    1984 M923 "Maj. Zippidy" who now is equipped like a M925A1
    1991 M998 HMMWV

    1990 Kasel M101A2
    1968 Case Master M101A1 with fuel tank and gen set up
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    4 Star General 74M35A2's Avatar
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    On a 250 engine, the top bracket is just a brace or strut. Exactly the same piece is used. On an 8.3 engine, this is just flipped over, as the alternator is clocked 180 degrees from the 250 position, so, on an 8.3, the top mount changes and the bottom mount is just a brace to the single alternator mounting ear.
    CFO @ Portacharger

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    General elkhtr's Avatar
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    Thank you 74M35A2 for the usefull information.
    who has to be bribed to get this added to the five ton sticky.
    Marc
    1984 M923A1 "Aimee"
    1982 Mep 004A "genny"
    1974 M151A2
    1971 M810 ?????
    My daughters named em, I chose the spelling.
    They told me to get a hybrid, so I parked my truck on six priuses, does that count.

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    4 Star General 74M35A2's Avatar
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    Thanks and you're welcome. I hope it to be useful to all. I personally don't think this particular post is valid enough to be a sticky. But, if the board wants, I can combine all of the alternator and bracket info into one single post and then (they) make that a sticky. I have published all of this info about the board, but it is across several threads right now. I would do a single write up concerning the measured output and weakness of the stock 60 amp alternator, the differences between J-180 short and long mounting styles, the factory part numbers, cost, and alternate sources to acquire commercial alternator bracketry for 6CTA8.3, NHC-250, and LDT/S engines, description of each terminal found on todays alternators (most are optional), some photos of how users have adapted conventional and dual alternators, and a general clarification of civilian commercial alternators which are available at reasonable cost, including the $100 Chinese Delco clones that many are referring to as Delco's (which are not).
    CFO @ Portacharger

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    4 Star General juanprado's Avatar
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    I know I and others would appreciate the info as it has been very informative if you would put it together as some us old gremlins suck at search....

    I was able to score a used bracket for $45 plus ride in Tx from a truck wrecking yard with the info you provided. My alt has already taken one dump in 4 years so I know it just a question of when. Now I have a large part of the puzzle to upgrade when the times comes.

    Thanks!
    1984 M923 "Maj. Zippidy" who now is equipped like a M925A1
    1991 M998 HMMWV

    1990 Kasel M101A2
    1968 Case Master M101A1 with fuel tank and gen set up
    1991 Eastern Technologies M105A2
    60's ? m116a1? radar trailer flatbed
    xm1073 flat bed 7 1/2 ton


    "Success demands a high level of logistical and organizational competence."
    - General George S. Patton, Jr

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    4 Star General 74M35A2's Avatar
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    There is a lot of great knowledge and people here, so I am happy to contribute at least something. The alternator I sell is pricy but top notch. For lower cost, I'd recommend somebody to buy a used but genuine 24V Delco Remy off eBay. Put a new regulator in it, hit the commutator slip rings with a Scotch Bright pad, pull the front and rear bearing seals out and wipe a finger full of new grease in em', and it should go at least 100,000 miles.
    CFO @ Portacharger

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    General Plane Fast's Avatar
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    Is there a quick way to know if they are real Delco? (From pics)
    I guess what should the price point be for the real ones?
    Thanks
    M923A2 1990 For Sale
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    4 Star General 74M35A2's Avatar
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    Any genuine Delco Remy alternator will have their name cast into the rear housing. A Chinese one will not have this, it will simply have no name cast into the back side of the rear housing.

    Estimated cost for a genuine new Delco Remy 24v J-180 short alternator from a distributor would be in the $275 range. Used on eBay and from used parts yards can be had in the $45 range. It will not be as high tech or have the same longevity as a Denso or Mitsubishi, but it will be ahead of the Chinese clone.
    CFO @ Portacharger

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