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Jake brake

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by BigRig1980, Jun 10, 2020.

  1. Jun 10, 2020 #1
    BigRig1980

    BigRig1980 Bobtail Member

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    Feb 26, 2020
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    I was messing with my old w9 earlier and noticed it has 425a jake brakes on it. Did some research and what I found was that series/model was designed for big cam Cummins and my w9 has 7fb 3406b in it. My question is how is it working or how did the previous owner make it fit. By the way it hits very hard and LOUD lol.
     
    BigRig1980, Jun 10, 2020
    BigRig1980, Jun 10, 2020
    #1
    truckdriver31 Thanks this.
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  3. Jun 11, 2020 #2
    AModelCat

    AModelCat Road Train Member

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    Jul 7, 2015
    Canuckistan
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    I'd have to say there's something screwy there. IIRC Cummins uses the injector lobe on the camshaft for actuation. CAT doesn't have an injector lobe on the camshaft, its got an injection pump.
     
    AModelCat, Jun 11, 2020
    AModelCat, Jun 11, 2020
    #2
    650cat425 and Diesel Dave Thank this.
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