View Full Version : Trailer Brakes Surging

04-26-2011, 02:17 PM
Any help on why the brakes would surge as I'm stopping? It's a 2005 tandem MC trailer with disc brakes. The brakes work good especially a quick stop, or a very slow stop. But normal speed applying the brakes, the trailer brakes will surge, bleeding isn't the issue. The rotors are smooth, the pads are getting close to replacing. Idea?

04-26-2011, 02:30 PM
Sounds like the shock may be worn out. Rotors could be warped.

04-26-2011, 03:15 PM
+1 the shock inside the actuator assembly. what it sounds like anyway.

04-26-2011, 04:47 PM
meh... just disconnect 'em :)

04-26-2011, 07:11 PM
Check p.17 of this PDF, it has a list of possible causes of "chucking".


I have the same problem on my '03 trailer. According to my dealer it is being caused by a brass fitting off of the solenoid which has too large of a hole (not sure what year they switched to a smaller-holed fitting). They got me a new part (#650680, brass orifice .0018 <- their description not mine) with a smaller hole but I haven't installed it yet as it requires bleeding the brakes. It's only a $7 part so it may be worth trying before you start swapping out the actuator shock or master cylinder, etc.