1. Thank you for visiting HeavyEquipmentForums.com! Our objective is to provide industry professionals a place to gather to exchange questions, answers and ideas. We welcome you to register using the "Register" icon at the top of the page. We'd appreciate any help you can offer in spreading the word of our new site. The more members that join, the bigger resource for all to enjoy. Thank you!
  2. ALL NEW MEMBERS READ THIS FIRST!! Thank you for joining Heavy Equipment Forums! If you are new to forums we communicate with "Threads", please search our threads to see if your topic may have already been answered and if not then click "Post New Thread" in the appropriate forum. This will allow all of our members to see your question and give you the best chance to be answered. After you've made a number of posts you will graduate to Full Member status where you'll see a few more privileges. Following these guidelines will help make this the best resource for heavy equipment on the net. Thanks for joining us and I hope you enjoy your stay!!

Got one for you Cummins 855 experts!

Discussion in 'Trucks' started by CJLennon, Oct 6, 2011.

  1. CJLennon

    CJLennon Well-Known Member

    Joined:
    Jul 24, 2009
    Messages:
    62
    Location:
    Chapel Hill, NC
    Hey Folks, as always, thanks so much for making me look smart with the boss. Here's the story. I have a Cummins 855 NTA-370 (engine # 10417020) that I talked about in a previous post last year that had a serious smoking problem. (Yeah, I know. . . ). See we (foolishly) did a bunch of things to get it to stop smoking and when we finally completed our efforts, it stopped smoking BUT it also stopped pulling. We put everything back to how it was when it smoked in an effort to get the pulling back except for one thing - injectors. We had replaced the injectors (original part # AR40430) with new injectors (3054246) and this was the only thing that was not put back to its original state when it smoked and pulled. So I get on the phone with ProDiesel to see if we can get an original set and they say that the AR40430 injector has been discontinued and is replaced with the 3054250 injector BUT you have to replace the rocker arms and push rods. They also did a reverse look up with the number of the injector that was in the engine when the pulling stopped and they said that the 3054246 injector is for the NTC-350 engine and not the NTA-370 engine. So this is my situation. Now that I have shared my tale of woah with you, my questions are:

    1.) Does this make sense or are the guys at ProDiesel just having fun with me?

    2.) Would an NTC-350 injector make an NTA-370 engine run at (say) 60 - 75% of it's original power?

    3.) Have you ever heard of this rocker arm change over thing????????

    As always, thanks to all!!!

    Chris