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Dash valves

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Dino soar, Jan 27, 2020.

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  1. Jan 27, 2020 #1
    Dino soar

    Dino soar Road Train Member

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    My parking valves are leaking on my truck.

    Is there any better or worse brand to buy?

    Freightliner wants $185 for the parking valves. Is there a good alternative that is less expensive?

    Someone mentioned rebuilding the valves with new O-rings. Is that a good option?
     
    Dino soar, Jan 27, 2020
    Dino soar, Jan 27, 2020
    #1
    Cabinover101 and blairandgretchen Thank this.
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  3. Jan 27, 2020 #2
    lester

    lester Midwest's #1 Feed Hauler

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    I've always just rebuilt mine. Easier than replacing the whole assembly. Although the parts guy looked at me funny when I requested a rebuild kit rather than new valves. Seems no one likes to sell rebuild parts anymore.
     
    lester, Jan 27, 2020
    lester, Jan 27, 2020
    #2
    mile marker 27, Cabinover101 and Dino soar Thank this.
  4. Jan 27, 2020 #3
    xsetra

    xsetra Road Train Member

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    A mechanic suggested to me if rebuilding also replace the spool. I'm not sure what part in the valve that is.

    He told me all the o-rings and the spool can be replaced from the front of assembly. It is not necessary to remove the valve from the dash.
     
    xsetra, Jan 27, 2020
    xsetra, Jan 27, 2020
    #3
    Dino soar Thanks this.
  5. Jan 27, 2020 #4
    blairandgretchen

    blairandgretchen Road Train Member

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    Sure it's the dash valve, not a brake chamber?
     
    blairandgretchen, Jan 27, 2020
    blairandgretchen, Jan 27, 2020
    #4
    Cabinover101, Dino soar, truckdriver31 and 1 other person Thank this.
  7. Jan 27, 2020 #5
    Dino soar

    Dino soar Road Train Member

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    It better not be.

    Every one on the truck is brand new with 0 miles on them and all new airlines.

    I'm going to double-check tomorrow to make sure it is not anything else behind the dash, as suggested.

    But if I start the truck and let it build up to 120 and shut the truck off, I hear an air leak at the valve, or at least I hear it there where the valves are on the dash.

    This is with the brakes locked.
     
    Dino soar, Jan 27, 2020
    Dino soar, Jan 27, 2020
    #5
    Cabinover101 and baha Thank this.
  8. Jan 27, 2020 #6
    BoxCarKidd

    BoxCarKidd Road Train Member

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    If your truck was parked for awhile you may get by with O-rings and maybe spools, just old O-rings.
    My experience with repairing plastic valves was not so good. Found the plastic wore where the O-rings travel. Repair often did not work or last.
     
    BoxCarKidd, Jan 27, 2020
    BoxCarKidd, Jan 27, 2020
    #6
    Rideandrepair, spsauerland and Dino soar Thank this.
  9. Jan 27, 2020 #7
    Dino soar

    Dino soar Road Train Member

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    Is there a better or worse brand to buy?

    Is there any alternative to $185 at Freightliner?

    I do not mind spending that if that is a reasonable price for something that is going to be good.

    This is my first round buying them so I really I'm not sure on the price or what to buy or where.
     
    Dino soar, Jan 27, 2020
    Dino soar, Jan 27, 2020
    #7
  10. Jan 27, 2020 #8
    truckdriver31

    truckdriver31 Road Train Member

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    is $185 going to kill you. check truck pro. online etc. dont rebuild buy new and be done with it. not worth a out of service or worse
     
    truckdriver31, Jan 27, 2020
    truckdriver31, Jan 27, 2020
    #8
  11. Jan 28, 2020 #9
    201

    201 Road Train Member

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    Not to poke fun, but aren't you the guy that loves their Frightliner? I don't recall the dash valves leaking on my Peterbilt,,,sorry, that was a low blow, maybe the air is backing up through the dash valves. 4 way valve sticking?
     
    Last edited: Jan 28, 2020
    201, Jan 28, 2020
    201, Jan 28, 2020
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  12. Jan 28, 2020 #10
    062

    062 Road Train Member

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    I can’t remember if the blend door is air activated on those. You might try moving the selector and see if the leak changes.
     
    062, Jan 28, 2020
    062, Jan 28, 2020
    #10
    Dino soar Thanks this.
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