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Expert Answers about BMW Trailer Hubs and Drums


  • What Might Cause a Tandem Axle Trailer Front Axle Tires Insides to Wear Out Quicker
  • My guess would be that your trailer is sitting a little nose down which is putting excessive wear on the front axle instead of the rear. If you look at the trailer when hooked up does the suspension equalizer sit level or is it angled? If it's not level this would show it's not sitting level. I attached a help article on picking out ball mounts as well.
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  • Should I Be Able to Hear Trailer Brakes Hum Constantly with Manual Override Engaged
  • Thanks for your continued support, Ryan! While it's normal to be able to hear electric brake drums, like your Dexter Nev-R-Adjust Electric Trailer Brake Assembly # 23-464, humming when power is being applied to them, I recommend trying to physically move your trailer tires before investigating every inch of your wiring and magnets (which would be the next step). Sometimes the magnets can be a little quiet so what I recommend doing is lifting your trailer up by the frame enough for the...
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  • Troubleshooting Too Much Pressure With A Dexter Electric-Over-Hydraulic Actuator
  • Hey Maurice, The first thing I want to confirm is that you have disc brakes and not drum brakes? The Dexter DX Series Electric Over Hydraulic Brake Actuator # K71-651 is designed for disc brakes and would send out 1,600psi instead of just 1,000psi that drum brakes would need. If you have drum brakes then you would need the # K71-650 instead. The Tekonsha P3 only sends out voltage to the actuator so it's likely not the issue as long as you have the settings correct for electric-over-hydraulic...
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  • Troubleshooting Intermittent Trailer Disconnected Message When Towing
  • Hey Bill thanks for your question. Like you said there are several things that can cause an intermittent trailer disconnected message. The most common cause is a rusty or corroded trailer connector. Go ahead and inspect the trailers 7-way plug. If there is noticeable rust or corrosion it will need to be replaced with something like the 7-Way Round RV Style Trailer Connector # A7WCB. I suggest using a bit of Dielectric Grease # 11755 on the trailer plug and the vehicles 7-way. It is ok...
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  • Troubleshooting Low Voltage Output From Brake Controller On A Triple Axle Trailer
  • Hey Mark, What gauge wire did you use to run from the junction box to the brake assemblies? If you didn't use at least 10AWG wire # 10-1-1 that could explain the heat build up and voltage drop. I don't recommend leaving the manual override clamped for long periods of time. I recommend reconnecting your brake assemblies, activating the manual override, and then then testing both wires coming from the brake magnets to see if there's voltage on both wires. Only one should have voltage and...
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