Cummins Identifier

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by baa, Jan 20, 2020.

  1. baa

    baa Bobtail Member

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    I bought an old farm tractor with a military rebuilt Cummins engine in it. I am having difficulty figuring out what engine it is and am hoping someone can help me. It’s a V8 and someone hand wrote 903 on the manifold. It has a tag on the engine saying the serial number is 638655 and states it was rebuilt in 1990. Does that serial number belong to a 903 and if so what can you tell me about the engine?
     
  2. BoxCarKidd

    BoxCarKidd Road Train Member

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    Would that be a Steiger or a Verseitle made in the 70,s or early 80's. Should be around 300 HP.
    Register on Cummins insite and enter the serial number.
     
  3. BoxCarKidd

    BoxCarKidd Road Train Member

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    Massy used some also. Do not let Tom Dick or Harry run the overhead.
     
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  4. clausland

    clausland Medium Load Member

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    Like BCK said:
    Cummins QuickServe Online
     
  5. baa

    baa Bobtail Member

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    It’s a 1975 Versatile 900.
    It’s a 1975 Versatile which originally had a V 903.
     
  6. pup

    pup Light Load Member

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    Quickserve says its a v8 300-bi. build date nov 28 1968. service model name not available
     
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  7. QUALITYTRUCK

    QUALITYTRUCK Road Train Member

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    Build date:11/28/1968 Model: V8-300 BI
     
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  8. baa

    baa Bobtail Member

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    Thanks. Do you know what the BI stands for? Bi fuel? I’d also like to know the horsepower. In a service manual it lists three ratings each with a different RPM. Pleasure Boat 280 @ 3,000, Light Duty 245 @ 2,800 and Heavy Duty 206 @ 2,600. Does that mean all three are the same engine with the horsepower available at each of the RPM’s?
     
  9. pup

    pup Light Load Member

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    I'd check the fuel pump for a data tag. It should be on the top of the pump. A fuel code will give more information.
     
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  10. BoxCarKidd

    BoxCarKidd Road Train Member

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    And the CPL number. Call your local pump shop. Maybe even Cummins.
     
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