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New brakes are hopping

tomthyme
Explorer
Explorer
Well, I had some new brakes installed on my rig. They are electric drums on a 16k carriage cameo. On the way home from the shop today, I had to stop quickly. The rig started hopping like crazy. I backed down the gain and it got a little better. I eventually backed off almost 50%.

So, was the hopping caused by too much gain and my brakes locking up? Or was it something else?

Thanks so much folks!
2015 F350 King Ranch Dually 4x4, 22k Reese hitch
2011 Carriage Cameo 37cksls
Sarah (most beautiful creature in the world)
Mickey (105lb golden - good thing he's pretty)
Ashlee (85lb lab - spectacular pal)
Dutch (120lb lab - young one in training)
16 REPLIES 16

Maine-iacs
Explorer
Explorer
tomthyme wrote:
All I know is that I spent $1100 and now it at least tries to stop way better than before. I'm guessing the hopping is not where I want to be, but after adjusting down to 6.5 from 10, things are getting better.

Tom


It's getting to be time to do the brakes on my rig. Is $1,100. a low, average or high price? Hoping for lots of folks to chime in here.
Maine-iacs from the Great State of Maine

Jim
2018 Cougar 32RLI
2021 F-350 4x4 Crew Cab

Denny___Jami
Explorer
Explorer
After 12 years and around 90K miles our Dexter HD (12.1/4 x 3 3/8 shoes) they were wore out and it was cheaper to change to disk but I did it myself, $1750 for all the parts and material for 8K 13" disks.

Denny
2013 F350 SC DRW 6.2 V8 4.30 gears Air Lifts
2003 HitchHiker Premier 35FKTG 215/75/17.5 Goodyear G114 Tires

tomthyme
Explorer
Explorer
Thanks Denny for the info! That is very helpful.

Yeah - disc brakes are definitely preferred but we needed to cap the spending on this round. I look forward to moving to disk brakes in the next couple of years.

Thanks again for your help.

Tom
2015 F350 King Ranch Dually 4x4, 22k Reese hitch
2011 Carriage Cameo 37cksls
Sarah (most beautiful creature in the world)
Mickey (105lb golden - good thing he's pretty)
Ashlee (85lb lab - spectacular pal)
Dutch (120lb lab - young one in training)

Denny___Jami
Explorer
Explorer
tomthyme wrote:
45Ricochet wrote:
Glad to see you found the problem since your last thread. Just wondering what was your brake problem?


Well, from what I'm told by our dear friends at CW, I burned through 4 magnet/brake backings and 2 of 4 drums in about 5,000 miles. I looked at the 2 drums that had to be replaced, and there were serious grooves in the drum inner wall. I also looked at the backing plate (as if I knew what I was doing) but wasn't sure what was wrong there.

All I know is that I spent $1100 and now it at least tries to stop way better than before. I'm guessing the hopping is not where I want to be, but after adjusting down to 6.5 from 10, things are getting better.



I still need to check the suspension before our Memorial Day trip.

But we just got her out of the body shop, moved ot 17.5 inch wheels/tires, replaced the brakes, had her detailed and can't wait to get out in her.

Dang....this is fun....pricey, but fun.....

Thanks guys!
Tom


The groves where the magnets ride on the drums will cause excess magnet wear and damage the arm they ride on. You will also get poor braking and maybe some surging until the magnet wears into the groves in the drum. With my Dexter HD brakes and grooved areas where my magnets ride I used up a few magnets but never had the problems you were describing. Not seeing them mounted on the axles best guess would be something was mounted wrong the first time.

I solved my grooved drums by converting to Kodiak disk brakes instead of throwing money at outdated mechanical nightmares called electric brakes.

Denny
2013 F350 SC DRW 6.2 V8 4.30 gears Air Lifts
2003 HitchHiker Premier 35FKTG 215/75/17.5 Goodyear G114 Tires

Denny___Jami
Explorer
Explorer
tomthyme wrote:
Denny & Jami wrote:

Sounds like the primary and secondary shoes are reversed.

Denny


Soooooo, which should be the primary and which should be the secondary? Is it a front/rear axle thing.....based on physics, that would makes sense.....


The front shoe is the secondary and normally has a smaller surface, the rear shoe dose 90% of the braking. When the magnet moves the front shoe out it contacts the drum first pushing the back shoe hard against the drum. If you look at the backing plate you will see that the top of the back shoe is solid against the pin were the front shoe pivots out with the arm. The solid shoe dose the braking going forward, if the shoes are reversed it will a case a chatter. If they replaced the hole backing plate and got right and left sides reversed that will also cause all sorts of problems, the magnet arm should be to the front.

Denny
2013 F350 SC DRW 6.2 V8 4.30 gears Air Lifts
2003 HitchHiker Premier 35FKTG 215/75/17.5 Goodyear G114 Tires

tomthyme
Explorer
Explorer
45Ricochet wrote:
Glad to see you found the problem since your last thread. Just wondering what was your brake problem?


Well, from what I'm told by our dear friends at CW, I burned through 4 magnet/brake backings and 2 of 4 drums in about 5,000 miles. I looked at the 2 drums that had to be replaced, and there were serious grooves in the drum inner wall. I also looked at the backing plate (as if I knew what I was doing) but wasn't sure what was wrong there.

All I know is that I spent $1100 and now it at least tries to stop way better than before. I'm guessing the hopping is not where I want to be, but after adjusting down to 6.5 from 10, things are getting better.

I still need to check the suspension before our Memorial Day trip.

But we just got her out of the body shop, moved ot 17.5 inch wheels/tires, replaced the brakes, had her detailed and can't wait to get out in her.

Dang....this is fun....pricey, but fun.....

Thanks guys!
Tom
2015 F350 King Ranch Dually 4x4, 22k Reese hitch
2011 Carriage Cameo 37cksls
Sarah (most beautiful creature in the world)
Mickey (105lb golden - good thing he's pretty)
Ashlee (85lb lab - spectacular pal)
Dutch (120lb lab - young one in training)

RCMAN46
Explorer
Explorer
New brakes do not have full contact with the brake drums.

After a couple hundred miles with the gain set low they will wear in and you should be able to increase the gain to about where it was before the brake replacement.

tomthyme
Explorer
Explorer
Denny & Jami wrote:

Sounds like the primary and secondary shoes are reversed.

Denny


Soooooo, which should be the primary and which should be the secondary? Is it a front/rear axle thing.....based on physics, that would makes sense.....
2015 F350 King Ranch Dually 4x4, 22k Reese hitch
2011 Carriage Cameo 37cksls
Sarah (most beautiful creature in the world)
Mickey (105lb golden - good thing he's pretty)
Ashlee (85lb lab - spectacular pal)
Dutch (120lb lab - young one in training)

Denny___Jami
Explorer
Explorer
tomthyme wrote:
Well, I had some new brakes installed on my rig. They are electric drums on a 16k carriage cameo. On the way home from the shop today, I had to stop quickly. The rig started hopping like crazy. I backed down the gain and it got a little better. I eventually backed off almost 50%.

So, was the hopping caused by too much gain and my brakes locking up? Or was it something else?

Thanks so much folks!


Sounds like the primary and secondary shoes are reversed.

Denny
2013 F350 SC DRW 6.2 V8 4.30 gears Air Lifts
2003 HitchHiker Premier 35FKTG 215/75/17.5 Goodyear G114 Tires

laknox
Nomad
Nomad
45Ricochet wrote:
Glad to see you found the problem since your last thread. Just wondering what was your brake problem?
And yes I agree, to much gain. You should be pulling right about 6 volts with the new brake backs.

Oh yeah a broken shackle and a nice upgrade to wet bolts on the left.



A "spring hangar" is the solid piece that's welded to the frame that holds the top of the "spring shackle". 🙂 "Spring perch" is where the spring pack attaches to the axle.

Lyle
2022 GMC Sierra 3500 HD Denali Crew Cab 4x4 Duramax
B&W OEM Companion & Gooseneck Kit
2017 KZ Durango 1500 D277RLT
1936 John Deere Model A
International Flying Farmers 64 Year Member

45Ricochet
Explorer
Explorer
Glad to see you found the problem since your last thread. Just wondering what was your brake problem?
And yes I agree, to much gain. You should be pulling right about 6 volts with the new brake backs.

Oh yeah a broken shackle and a nice upgrade to wet bolts on the left.

2015 Tiffin Phaeton Cummins ISL, Allison 3000, 45K GCWR
10KW Onan, Magnum Pure Sine Wave Inverter
2015 GMC Canyon Toad

Previous camping rig
06 Ram 3500 CC LB Laramie 4x4 Dually 5.9 Cummins Smarty Jr 48RE Jacobs brake
06 Grand Junction 15500 GVWR 3200 pin

tomthyme
Explorer
Explorer
Thanks all! Now I just have to figure out what a shackle is....lol....:)
2015 F350 King Ranch Dually 4x4, 22k Reese hitch
2011 Carriage Cameo 37cksls
Sarah (most beautiful creature in the world)
Mickey (105lb golden - good thing he's pretty)
Ashlee (85lb lab - spectacular pal)
Dutch (120lb lab - young one in training)

SkiSmuggs
Explorer
Explorer
Sounds like you got all the good advice you need, other than to read up on how to set the gain.
2015 F350 XLT PSD 6.7 Crew Cab, Andersen Ultimate hitch
2012 Cougar High Country 299RKS 5th wheel, Mor/Ryde pinbox, 300w of solar

DennisVR
Explorer
Explorer
I would say it was the gain. You had it set for the old brakes and it was set to high for the new ones. I would agree with the above poster to check all the suspension parts also. I inspected mine and found broken shackles.