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3406b info?

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by 85pete359, Jul 17, 2020.

Page 7 of 7
  1. Aug 19, 2020 #61
    85pete359

    85pete359 Light Load Member

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    Hey catguy, thanks buddy thanks the info on the engine, what is arrangement number the 7c-9438 mean? And I’m not sure if it’s because it’s 350 hp for why I feel loss in power or it’s upgrades weren’t done properly, I’m used to driving the n14 Cummins so the power difference is new to me, also woreout thanks brother I got it running with the help of you and everyone else that gave input you guys are awesome thanks
     
    85pete359, Aug 19, 2020
    85pete359, Aug 19, 2020
    #61
    Coffey Thanks this.
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  3. Aug 19, 2020 #62
    catguy94

    catguy94 Bobtail Member

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    Arrangement number meaning how it was built so to speak. 350, 400, 425 horse engines had a certain arrangement also depend on if there were industrial, on highway, off highway etc and serial number is just for that specific engine.

    several issues could cause low power but I always take previous owners words with a grain of sand unless there is paperwork to back it. Only way to tell is pull the head and look at the pistons and drop pan to see rods. Even then the pump still needed to be set for the iron change as well as nozzles for a 425. A B model set right will walk all over an N-14 and stay together three times as long. Take care of it and it’ll take care of you. Also keep in mind an E model also will pull so much different than a mechanical. Best thing to do is find a good mechanical cat guy (old cat truck shop guy) and have him put gauges on it and run it down the road. See what it’s doing...then have him set up on the pump and check where it’s set at with dials. A true old school guy will know exactly what to do and what you’re talking about. Now days cat dealers don’t even have anyone that’s seen B models much less have the governor group and knowledge to set up on it and check.
     
    catguy94, Aug 19, 2020
    catguy94, Aug 19, 2020
    #62
    650cat425 Thanks this.
  4. Aug 19, 2020 #63
    85pete359

    85pete359 Light Load Member

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    That’s a fact everyone where I’m at even cat dealer have no clue, I’m no mechanic and have no experience with these mechanicals but got enough no how to know they don’t know my delema is I’m from nyc down here we don’t got old school cat guys or old school any kinda guys most of the guys rebuilding are foreigners working for pennies but this is what we’re used to, you know any one on the north East even as far as Ohio I could take it to so they could take a look at it? I’m getting a lot of info from you guys and research of my own but it’ll be nice to have a knowledgeable guy open it up and tell me what’s up with it
     
    85pete359, Aug 19, 2020
    85pete359, Aug 19, 2020
    #63
  5. Aug 19, 2020 #64
    wore out

    wore out Numbered Classic

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    B and C nozzles are not the same. Cracking pressure on a C is higher than a B.

    You can push B nozzles with a C pump

    You will have fuel in the oil if you try to push C nozzles with a B pump
     
    wore out, Aug 19, 2020
    wore out, Aug 19, 2020
    #64
    650cat425, Coffey, 062 and 2 others Thank this.
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