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  1. #1
    Join Date
    Aug 2007
    Location
    Alpine, Utah
    Posts
    191

    Default Trailer Surge Brakes Working?

    How can I tell if the surge breaks on my trailer are working? When I'm pulling the boat and step on the brake, it seems like I'm being pushed more then I am used to. Any suggestions?

    Thanks,

    Garn
    Garn
    2007 Mobius LS (Direct Drive)

  2. #2
    Join Date
    Jun 2007
    Location
    Vancouver, WA
    Posts
    5,457

    Default

    Start with the easy stuff -

    Unplug your lights and try backing up. If you can't do it without almost doing a burnout then your surge brakes are working.

    Pop the little cap on the trailer tongue and check the brake fluid reservoir - make sure it's topped off.

    Still concerned? Pull a wheel and inspect your pads/calipers/rotors.
    So when is this "old enough to know better" supposed to kick in?

    2001 MobiusV - Slightly Modified...

  3. #3
    Join Date
    Jul 2008
    Location
    Snellville, GA & Lake Sinclair
    Posts
    8,419

    Default

    Visually inspect the rotor face. They develop a thin coat of rust quickly. If there is rust present, the caliber hasn't been engaging/the brake pads aren't grabbing the rotor. As I only use the trailer twice a year, I notice the rust in the fall and take the trailer for a spin before loading the boat. If the rust is gone after my test drive, I know all is working as it should be.

  4. #4
    Join Date
    Sep 2009
    Location
    newnan, GA
    Posts
    437

    Default

    Usually if there is a loss in hydraulic pressure in the brake system, the tongue will collapse pretty easily and will not push itself back out. This would be noticed when taking off from a stop you will feel a jerk as the tongue is pulled out by your tow vehicle.

    2005 mobius lsv 2900lbs ballast
    2005 mobius lsv

  5. #5
    Join Date
    Jun 2007
    Location
    Vancouver, WA
    Posts
    5,457

    Default

    Really? I thought that the little "clunk" when taking off was pretty common for surge brake trailers. I've had that for years but I know the brakes work. Maybe not as good as they could/should...
    So when is this "old enough to know better" supposed to kick in?

    2001 MobiusV - Slightly Modified...

  6. #6
    Join Date
    Feb 2012
    Location
    South Jordan, Utah
    Posts
    255

    Default

    Quote Originally Posted by bergermaister View Post
    Really? I thought that the little "clunk" when taking off was pretty common for surge brake trailers. I've had that for years but I know the brakes work. Maybe not as good as they could/should...
    +1

    My trailer does the same thing. I thought it was normal. My brakes ate working great as well. Hmmm
    Kurt
    2019 Supra SL 550
    2016 Mojo - Sold
    2006 Mobius LSV -Sold

  7. #7
    Join Date
    Mar 2011
    Location
    Belton, Texas
    Posts
    2,607

    Default

    My trailer has been doing that same thing since I took delivery as a new unit. Don't think that "jerk" is relative to brake issues. If it is I've ha a bad trailer since signing my life away


    Sent from my home phone..
    Jason

    Go Hard or Go Home.......it's MOOMBA time!!

    2009 Moomba Mobius LSV

  8. #8
    Join Date
    Sep 2009
    Location
    newnan, GA
    Posts
    437

    Default

    A slight jerk is normal. Just a small bump is all you should feel. When my brakes weren't working I had to ease off from a stop otherwise it would slam pretty hard

    2005 mobius lsv 2900lbs ballast
    2005 mobius lsv

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