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L10 Cummins ISSUE- one day great oil pressure and next day the alarm goes off. Every day is a gamble

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by DumpsterDaddy, Jul 31, 2019.

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  1. Jul 31, 2019 #11
    AModelCat

    AModelCat Road Train Member

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    Canuckistan
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    I'm no Cummins expert but I wouldn't throw a pump at it yet. Pumps don't normally just work on/off intermittently like that. I would take a look at the oil pressure relief/regulator valve first. It might be sticky. No idea if its a serviceable item or if its integral to the pump.
     
    AModelCat, Jul 31, 2019
    AModelCat, Jul 31, 2019
    #11
    Bean Jr., Dave_in_AZ, x1Heavy and 1 other person Thank this.
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  3. Jul 31, 2019 #12
    DumpsterDaddy

    DumpsterDaddy Bobtail Member

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    That’s what I’m considering. It’s a cab over so I’m dreading
     
    DumpsterDaddy, Jul 31, 2019
    DumpsterDaddy, Jul 31, 2019
    #12
  4. Jul 31, 2019 #13
    DumpsterDaddy

    DumpsterDaddy Bobtail Member

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    5F3D8A12-95E9-4285-9A52-E9E1A076D102.jpeg 6575C17D-EE71-46B9-86C5-E820E36ED2B8.jpeg B8474C02-4DC8-46B8-BB56-13404EA286CD.jpeg Anyone know where oil pressure regulator is? I can’t find it. Thinking maybe it’s stuck?

    Any opinions?
     
    DumpsterDaddy, Jul 31, 2019
    DumpsterDaddy, Jul 31, 2019
    #13
  5. Jul 31, 2019 #14
    DumpsterDaddy

    DumpsterDaddy Bobtail Member

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    I just posted pictures. I can’t seem to find it. It wouldn’t be internal would it?
     
    DumpsterDaddy, Jul 31, 2019
    DumpsterDaddy, Jul 31, 2019
    #14
  7. Jul 31, 2019 #15
    x1Heavy

    x1Heavy Road Train Member

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    Last picture on bottom to far right lower corner. You have three lines bleeding bad to me.

    Im working on high lines to powersteering that has to be replaced to bleeding myself and they look just like that.

    Ive been away too long from cabovers. So I'll leave it there.
     
    x1Heavy, Jul 31, 2019
    x1Heavy, Jul 31, 2019
    #15
    DumpsterDaddy Thanks this.
  8. Jul 31, 2019 #16
    DumpsterDaddy

    DumpsterDaddy Bobtail Member

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    Thanks I’ll look closer
     
    DumpsterDaddy, Jul 31, 2019
    DumpsterDaddy, Jul 31, 2019
    #16
  9. Jul 31, 2019 #17
    DumpsterDaddy

    DumpsterDaddy Bobtail Member

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    I tried they have no free data on this engine. Or it’s very limited. I could get parts list though
     
    DumpsterDaddy, Jul 31, 2019
    DumpsterDaddy, Jul 31, 2019
    #17
    Messy Jackson Thanks this.
  10. Jul 31, 2019 #18
    DumpsterDaddy

    DumpsterDaddy Bobtail Member

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    They do but they said I had to buy from store. Only real info I can get is using parts lists.
     
    DumpsterDaddy, Jul 31, 2019
    DumpsterDaddy, Jul 31, 2019
    #18
  11. Jul 31, 2019 #19
    DumpsterDaddy

    DumpsterDaddy Bobtail Member

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    I think that’s where I’ll start and at least inspect it first
     
    DumpsterDaddy, Jul 31, 2019
    DumpsterDaddy, Jul 31, 2019
    #19
  12. Jul 31, 2019 #20
    BoxCarKidd

    BoxCarKidd Road Train Member

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    Sometimes low oil pressure and it smokes at the same time? Could this be an STC engine?
     
    BoxCarKidd, Jul 31, 2019
    BoxCarKidd, Jul 31, 2019
    #20
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