Do brake chambers have brake fluid in them?

Discussion in 'Trucking Schools and CDL Training Forum' started by Newtotrucking2020, Dec 5, 2019.

  1. 201

    201 Road Train Member

    11,166
    22,649
    Apr 16, 2014
    high plains colorado
    0
    Clearly, you can't have juice brakes for a trailer. The old "one line" trailer brakes you are thinking of was for trailers with the old vacuum brakes, which were just as bad. Lot's of straight trucks had juice brakes and hydra-vacs well into the 90's.
     
    buddyd157 Thanks this.
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

  3. pavrom

    pavrom Road Train Member

    3,015
    6,840
    Apr 29, 2012
    NE illinois
    0
    Make sure you put your favorite flavored air when adding air in tire , strawberry banana , orange etc ....but you cant mix air of different flavors !
     
    FlaSwampRat Thanks this.
  4. dibstr

    dibstr Road Train Member

    1,308
    927
    Sep 10, 2010
    Mississippi
    0
    You are correct, pressure is not a reason for using air brakes over hydraulic brakes. If higher pressure were a factor manufacturers would put hydraulic brakes on class 8 vehicles. Hydraulic brakes regularly are working around 1500+psi.
     
    not4hire Thanks this.
  5. okiedokie

    okiedokie Road Train Member

    9,705
    61,609
    Jun 13, 2011
    PNWET
    0
    I'm not going ready this whole s%÷&show but there's fluid in the air brake system during the winter. Tequila works good and you can drink it later. By pass the air dryer. Cheers
     
    FlaSwampRat and not4hire Thank this.
  6. MACK E-6

    MACK E-6 Moderator Staff Member

    45,826
    200,195
    Sep 19, 2005
    Baltimore, MD
    0
    Also, an air brake system has the means to replenish itself, as opposed to a hydraulic system that may leak.
     
    FlaSwampRat, 201, not4hire and 2 others Thank this.
  7. AModelCat

    AModelCat Road Train Member

    27,626
    144,548
    Jul 7, 2015
    Canuckistan
    0
    Hydraulics may have higher pressure but its acting on a much smaller surface area and does not have the mechanical advantage of a slack adjuster or the ramps on the S-cam. So kind of a moot point about pressures.
     
    FlaSwampRat Thanks this.
  8. dibstr

    dibstr Road Train Member

    1,308
    927
    Sep 10, 2010
    Mississippi
    0
    Mechanical advantages can be designed, but I’m just saying there are several very good reasons (Some of which have mentioned in this thread) why hydraulics are not feasible and lack of pressure is not one of them. With the pressures hydraulic brakes work at, engineers would seemingly have more problems not over advantaging them.
     
    FlaSwampRat, 201 and not4hire Thank this.
  9. not4hire

    not4hire Road Train Member

    7,142
    26,946
    May 16, 2012
    Calgary
    0
    You know, you don't have to reply to every thread... you just don't. And you really shouldn't when you're so egregiously wrong, like you are in this case.



    The correct answers have been given, but to summarize; air brakes are used on semis (and trains) because, unlike passenger vehicles (and straight trucks), they are not "closed" systems. Air is made continuously available and replenishes the system which accounts for system breaks (coupling/uncoupling), leakage, poor maintenance, etc.

    Air is compressible... hydraulic fluid is not. Air can NEVER provide pressures even remotely close to that which is achievable with fluid.

    So, air is not ideal for providing high pressures, but it is ideal as a continuously supplied "fluid."
     
    ZVar, 1951 ford, AModelCat and 5 others Thank this.
  10. homeskillet

    homeskillet Road Train Member

    5,024
    33,771
    Jun 1, 2013
    Dayton, OH
    0
    I wish I could thank your post twice, not4hire.........
     
    not4hire and dibstr Thank this.
  11. Newtotrucking2020

    Newtotrucking2020 Bobtail Member

    25
    9
    Oct 8, 2019
    0
    The Illinois state issued study guide in section 2 says "shoes or pads with oil, grease or brake fluid on them". Then I seen a YouTube pretrip video and the guy mentioned air line and brake fluid line going to brake chamber.
     
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.