Help! Unique Trailer Problem

Discussion in 'Mechanic and Repair' started by KML, Aug 14, 2004.

  1. KML

    KML LawnSite Member
    Posts: 2

    I am having trouble with my hydroseeder, no problems at all when towing my equipment trailer. When towing the hydroseeder and I touch the brake pedal even the least bit the electric brakes on the hydroseeder lock up even when the brake controller is turned all the way down to its lowest setting. It works fine when I manually activate the brake controller it is only when I use the brake pedal. I replaced the brake controller this morning and the problem still exists. The truck is seven years old and everything has worked fine up to this point and the hydroseeder is only a couple of years old and never had any trouble with it. All the wiring is sealed on the seeder and it was serviced this winter, it doesn't get used a lot but enough that corrosion in the brakes shouldn't be an issue.

    Anyone ever experience this type of problem? I am frustrated and at a loss for what to do. I am thinking of backing the adjusters off so that I don't ruin the tires, but I really don't want to, I want to fix it right, the unit is really heavy when full and the brakes are needed. Any help would be appreciated.
  2. fixer67

    fixer67 LawnSite Silver Member
    Posts: 2,100

    It sounds like you hyrdoseeder brakes are running off your brake lights circuit. You have a cross feed problem some where. To test for this, unplug the brake controller and see if you still get the electric brakes on the hyrdoseeder to work. I have seen this happen before. What happens is when you press down on the brake pedal the electric brakes get 100% full power from the brake lights install of what the controller is meant to send them.
    You said you are thing about backing off on the adjusters, there are no adjusters on electric trailer brakes. All electric trailer brakes are is electromagnetic brakes shoes. I had some old one here I was going to post a picture of but can not find them just down. I will post a picture of what a electric brake shoe looks like if I can find them.
  3. BladesAway

    BladesAway LawnSite Member
    from Ok
    Posts: 74

    This happened to me. Check the wires in the trailer plug. Sounds like they wired the trailer wrong. Mine was spliced into the trailer lights and they would come on full blast when I used the trucks brakes but was fine with just the controller. My trailers brakes can be adjusted! They work just like the slack adjusters on a regular drum brake.
  4. fixer67

    fixer67 LawnSite Silver Member
    Posts: 2,100

    That was what I was talking about. You must have the Dexter type assembly. They seem rare around here, that is why I said there were no adjusters. I keep forgeting this forum is world wide.

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