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Thread: Brakes won’t lock at full gain
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06-04-2021, 04:49 PM #1
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Brakes won’t lock at full gain
Hi. Brought the new 303 home and loaded up for the first trip. Found a side road to set the gain. At 25 mph it slows the same on every number from 6-10. I stop using the trailer brakes, but I can’t get the brakes to lock up. I know I’m within weight. I read on another thread that the trailer brakes might need adjusting, but is that a consideration on a new unit? Thanks!
2013 Ford F-250 Diesel
303RLSMike & Linda
303RLS
2013 F250 Turbo Diesel Crew Cab
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06-04-2021, 04:53 PM #2
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Mark & Mary. Full-timing across the USA (and Canada)!
Current Coach: 2021 Grand Design Reflection 320MKS
Current Rig: 2019 Ford F350 SD Crew Cab, w/8' box, Lariat, SRW, 6.7l Diesel
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06-04-2021, 04:55 PM #3
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06-04-2021, 05:04 PM #4
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It can depend on what type of surface you're on, too. On good, dry pavement, I wouldn't worry if the trailer brakes wouldn't lock up. On dirt or gravel, they should at the highest gain. While you look at adjustment, check to see if there's any grease inside the drums or back side of the brake plate (from the inside seal).
RobU.S. Army Retired
2012 F350 DRW CC LB Lariat PS 6.7
2020 Solitude 310GK-R, MORryde IS, disc brakes,
Sailun LRG tires, solar, DP windows, W/D
(Previously in a Reflection 337RLS)
Full time since 08/2015
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06-04-2021, 05:56 PM #5
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Thanks everyone. I’ve dug pretty deep on the web. Some say to give it 400 miles or so to break in the brakes. I’m going to take my next trip in a week. The last one was a few hundred miles and all highway. Probably 5-6 stop lights and no traffic to and from the campground. I also need to double check that the truck is set to electric brakes and not EOH. If I don’t feel comfortable with them after that trip I’ll contact the rv dealer. Thanks again!
Mike & Linda
303RLS
2013 F250 Turbo Diesel Crew Cab
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06-04-2021, 08:12 PM #6
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2016 Ram 3500 SWD 3:73 Turbo Diesel 6'4"" box
OEM puck Pro 16K
2021 Reflection 311BHS
Previous:
2017 Reflection 29RS
Reese Sidewinder Hitch
Platte Lake MN.
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06-04-2021, 08:30 PM #7
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06-04-2021, 09:25 PM #8
True, they need seasoning, but you can bet they took their beating in transit from the factory. Based on your post, I'm wondering if maybe you misunderstand that you need to manually actuate the brake control, especially if built-in or inertia based controller. So truck to speed, off the gas, no foot on brake pedal and then squeeze the manual control evenly.
Last edited by geotex1; 06-04-2021 at 09:36 PM.
Rob & Nikki + Cloverfield
2020 Grand Design Solitude S-Class 3350RL
2015 RAM 3500 Longhorn Laramie Crew Cab, Long Bed, 4x4 Dually Cummins/AISIN
Mountains of Pennsylvania
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06-04-2021, 09:51 PM #9
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I had mixed experience on this.
With a 2005 Durango and a new 2009 Heartland 31RED, the brakes locked up no problem. Later, in 2015, I replaced the TV with the 2000 Ford F-250. I could not get the trailer brakes to lock at highest voltage on new Teksonsha P3. I asked everyone I could ask. They checked voltages; brakes were checked and adjusted for routine maintenance. They still worked; I felt comfortable stopping, so I didn’t obsess over it. I sometimes wondered if heavier F-250 was a factor. But it still nagged at me that the P3 manual says to adjust voltage until just short of lock, and that would never work. The trailer could be very “grabby” on the Durango, but never on the F-250.
This year, I’m pulling away with new-to-us Imagine 2600RB and test the brakes with the controller lever. Instant lock, on dirt/gravel, but it also will lock on pavement. I asked yet another mobile RV tech about it, and he didn’t think trailer brakes could lock; they had some sort of rolling forward adjustment. I showed him the manual, and he’d never heard of that.
One additional complication is that the 2600RB was on a different, used, P3 that was used for only a few trips with the 31RED. It started acting wonky, changing colors, not turning on, etc. during daily driving (not towing), so I replaced it with a gifted used P3.
So, while I’m not helping to answer the question, I hope maybe sharing my experience might be an opportunity to learn something.Douglas & Christine
2019 Ford F-250 XLT 6.2L V8 Fx4 Crew Cab short-bed
2021 Imagine 2600RB, Build 5/2020
Equal-i-zer 4-Point Sway Control™, 10000/1000 bars; Ford brake controller; LevelMatePRO+®
Goodyear Wrangler AT Adventure LT275/70R18 (E)
Westlake Super ST Load Range E 10 p.r.
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06-04-2021, 10:00 PM #10
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My F-150 will never lock the brakes. Neither on my old Jayco 5th, nor on my 2670MK. Many 1,000's of miles on each. But, I could definitely feel the tug of the trailer brakes slowing the combination first at higher settings.
I've seen sources that claim the Ford integrated controller is coupled to a lot of the other truck information to give max braking, but to prevent lockup as a safety feature. Can't cite an official source that this is true, however. As others report, my Ford and RV dealers have no idea....2017 Imagine 2670MK
2012 F-150 SCrew, Eco, 4x4 6.5 box
Max. Tow, HD Payload, Airbags, ProPride hitch
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