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Old 08-17-2014, 01:07 AM   #1
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How do you judge what to run your gain at on your TV?

I have a 2012 f150 with a built in trailer controller, I usually run it at 8.5, but I am really not sure how to gauge it.
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Old 08-17-2014, 06:38 AM   #2
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In a safe area, start towing and get up to about 25 mph and then push the manual brake slide lever on the controller completely to activate the trailer brakes. If the trailer brakes lock up completely and skid, you have too much gain and should reduce it. Keep repeating this process and reducing or increasing in small increments until you get the trailer brakes set to the point of just before a complete lock up where the wheels skid.
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Old 08-17-2014, 07:59 AM   #3
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My F150 manual on page 266-267 explains the gain setting procedure that goes something like this:
Pull your trailer on a dry level surface about 25mph and squeeze the manual lever together on the TBC. If the trailer tires lock up, reduce the gain level and repeat the process until you can squeeze the manual levers all the way together without the trailer brakes locking up.
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Old 08-17-2014, 08:00 AM   #4
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What met said ^^
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Old 08-17-2014, 08:26 AM   #5
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I tried to do it as mcfarmall described when I got my new trailer this year, but still have not been able to get the trailer brakes to lock up or stop my truck in any reasonable distance. I have been told that the brakes leave the factory only contacting the drum at about 20% and they need to be 'burnished' before they will perform the way they should. Because of this, I'm running my gain at 10 and waiting for the brakes to wear in.
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Old 08-17-2014, 05:12 PM   #6
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Was your trailer towed from the factory to your dealer or loaded on a trailer? Only takes 50 miles or so to burnish in the trailer brakes.
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Old 08-17-2014, 08:44 PM   #7
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norty,
I bought my X23B in Indiana right down the street from the factory and drove it 275 miles to my home in Ohio. It was mostly turnpike driving so the brakes didn't get that much of a workout. I did drive around a lot in Indiana trying to get them to grab, but no luck. Since then I've taken it out on three camping trips, but only a few miles from my house. Also, drove around for awhile getting used to the trailer, but they still don't stop the truck. I contacted Dexter and they told me that to burnish them I would have to go about 40 mph and slow to 20 mph using only the trailer brakes about 35 times. I did that, but I'm sure not 35 times. I just figured they'd wear in eventually, although I have been thinking about adjusting them. It's starting to concern me a bit!
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Old 08-17-2014, 09:14 PM   #8
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Have to admit it sounds strange to me. I'm no mechanic, just did as McFarm/manual said and it has always worked?
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Old 08-17-2014, 09:23 PM   #9
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I've replaced drum brakes before and always adjusted them so that they would drag just a little bit when spinning the the tire by hand. Maybe I should jack up the trailer and see if there is any drag present.
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Old 08-17-2014, 09:33 PM   #10
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I go by feel.. If it feels like my truck is being pulled to a stop i turn my gain down. If it feels like i am getting pushed to a stop, i turn it up..always adjusting depending if i am towing on hills or the flats. Try to get it feeling like it would when i brake w/o the trailer on.. A brake job is cheaper to do on a trailer than my truck so i'd rather be a bit high on my gain than a bit low.. Just my 2cents.
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