3406E Jake Brake

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Newguy333, Mar 5, 2018.

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  1. Mar 9, 2018 #21
    spsauerland

    spsauerland Road Train Member

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    Early Jakes had six hold downs then went to five. Think each letter was improvements and they are backwards compatible.
     
    spsauerland, Mar 9, 2018
    spsauerland, Mar 9, 2018
    #21
    SAR and Oxbow Thank this.
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  3. Mar 9, 2018 #22
    Newguy333

    Newguy333 Bobtail Member

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    Universal kit for 340 Jake, in retrospect, master pistons would not come out of their bores..front (5) poured oil out when the manual pin activated...leaking past the master piston, no doubt...
     
    Newguy333, Mar 9, 2018
    Newguy333, Mar 9, 2018
    #22
    Oxbow Thanks this.
  4. Mar 10, 2018 #23
    Newguy333

    Newguy333 Bobtail Member

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    Worn bores and pistons is what I was thinking too....I appreciate your help
     
    Newguy333, Mar 10, 2018
    Newguy333, Mar 10, 2018
    #23
    Oxbow Thanks this.
  5. Mar 10, 2018 #24
    spsauerland

    spsauerland Road Train Member

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    May 31, 2010
    West Harrison, In
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    Anytime! Please give us an update on it and what is the final fix.
     
    spsauerland, Mar 10, 2018
    spsauerland, Mar 10, 2018
    #24
    Oxbow and SAR Thank this.
  7. Mar 14, 2018 #25
    Newguy333

    Newguy333 Bobtail Member

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    Finally some resolution in this issue. Master piston stuck in 4 of the cylinders. Tried to get a machinist to remove them, no luck. Then I found an old hand at this here's the trick. Heat the housing to about 325 degrees. Drill a hole through the housing from the head end of the master piston. Drive the Piston out with a punch. While keeping the housing hot at 325,° put the correct size plug in the hole and then let it cool. Turns out they've been doing this for years. Obviously you'll want to replace the Pistons but at $18 a piece that's pretty cheap compared to replacing the housing. Waiting overnight for the Pistons to come in to reinstall them tomorrow hopefully to hear that wonderful sound we all call power braking
     
    Newguy333, Mar 14, 2018
    Newguy333, Mar 14, 2018
    #25
    Oxbow, spsauerland and SAR Thank this.
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