Pacbrake Broken Lash adjusting screws

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by LameMule, Jul 12, 2020.

  1. LameMule

    LameMule Light Load Member

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    I have a 3406b in an 87 peterbilt 359. It has the P-36 pacbrake engine brake and the lash adjusting screws are breaking and the control valve covers are cracked and broken. It seems like it was ran out of adjustment or something but I'm unfamiliar with them. I'm looking for input and or parts. Any help is greatly appreciated. 20200709_150006.jpg
     
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  3. blairandgretchen

    blairandgretchen Road Train Member

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    South west Missouri
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    My mechanic is having issues with my PAC Brakes on a 95 12.7.

    Interested to hear any input on this.
     
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  4. LameMule

    LameMule Light Load Member

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    Jan 19, 2020
    Montana
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    I went into town today and found some replacement lash adjusting screws. They're different than mine yet similar so I'm going do take some measurements and see how I feel about trying them out. I found a pacbrake refresh kit on Ebay for 90 bucks so that's on the way. I also found replacement control valve covers. I'm going to make a small plate to bolt down on top of the covers to add some strength. I'm going to tear them down to inspect and clean before reassembling. I'll keep you posted on my results.
     
    blairandgretchen Thanks this.
  5. 062

    062 Road Train Member

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  6. Dave_in_AZ

    Dave_in_AZ Road Train Member

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    I thought you had a Detroit?
     
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  7. blairandgretchen

    blairandgretchen Road Train Member

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    Yes - 12.7
     
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