Cummins n14 ESP+ Main Bearings

Discussion in 'Trucks [ Eighteen Wheelers ]' started by surfer24, Jul 17, 2013.

  1. surfer24

    surfer24 Bobtail Member

    32
    2
    Nov 4, 2012
    Cheshire, CT
    0
    So here is my question. We are doing mains and rods in a cummins n14 celect+ with ESN 11964732. Cummins quick serve online has different torque values based on ESN. my concern is the torque values do not seem right. Here is what the website says for main bearing capscrews:

    1.50ftlb
    2.100ftlb
    3.140ftlb
    4.loosen completely
    5.50ftlb
    6.100ftlb
    7.140ftlb
    8.rotate 90degrees

    This just seems way to low. The older block specs had it going all the way up to 255ftlb. Also under the crankshaft section of quick serve it has completely different values for mains than the ones I just gave. They go up to 305ftlb. Any help would be greatly appreciated. I went to cummins they wouldn't help and the tech number they gave me is on vacation.
     
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  3. Ashman_42

    Ashman_42 Light Load Member

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    Aug 14, 2011
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    Looking at my N14 manual its says theres two diff engine specs, here you go....
    Lube capscrews with 15w40 engine oil

    Engines built with 1" diameter capscrews
    1. 111ft/lb
    2.210 ft/lb
    3.306ft/lb
    Loosen Completely and repeat

    Engines built with 3/4" diameter capscrews
    1.89ft/lb
    2.170ft/lb
    3.254ft/lb

    Loosen completely and repeat
     
  4. surfer24

    surfer24 Bobtail Member

    32
    2
    Nov 4, 2012
    Cheshire, CT
    0
    That would be the specs under the crankshaft section and I will throw another curve ball. The bolts are 1 1/8"
     
  5. allan5oh

    allan5oh Road Train Member

    1,557
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    Jan 6, 2010
    Winnipeg, mb
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    That last 90 degrees will add alot of torque. I just did a cam bolt on a detroit and it has a 1 1/4 head. Specs are 55 ft lbs + 120 degrees, yet by the time you're done it's probably 700 ft lbs.
     
  6. surfer24

    surfer24 Bobtail Member

    32
    2
    Nov 4, 2012
    Cheshire, CT
    0
    That's what I was wondering. There are no conversions from degrees to ft lbs but even though a 1/4 turn doesn't seem like a lot I bet it is.
     
  7. allan5oh

    allan5oh Road Train Member

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    Jan 6, 2010
    Winnipeg, mb
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    I wouldn't be surprised if you're way over 300 ft lbs.
     
  8. Davidlee

    Davidlee Medium Load Member

    419
    156
    Aug 31, 2012
    0
    1. 90
    2. 170
    3. 255
    4. Loosen and repeat.

    Rods are 95 then 205.
     
  9. surfer24

    surfer24 Bobtail Member

    32
    2
    Nov 4, 2012
    Cheshire, CT
    0
    That's for an engine with an ESN 11875596 or older
     
  10. Heavyd

    Heavyd Road Train Member

    7,750
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    Feb 4, 2009
    0
    That last 90 degrees will add a huge amount of torque. Do not be scared by that. If you want to check, after your 90 degree turn, set your torque wrench to 200 and check the bolts, if it clicks with no movement try 225, then 250 and so on until the bolt starts to move a bit.
     
  11. surfer24

    surfer24 Bobtail Member

    32
    2
    Nov 4, 2012
    Cheshire, CT
    0
    I did them this afternoon and it came out to 305 ft lbs for the 90 degree turn. It was the 140ft lb that had us scared and thinking a 90 degree turn wouldn't equal how much torque should be on it.
     
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