Trucks & Trailers - Corroded Brake Backing Plate on Axle Questions

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briggss3
03-24-2011, 08:54 PM
About to install my Kodiak discs and stopped when I noticed the caliper mounting plate is only about 1/2 there due to saltwater corrosion. My question is can this be cut-off and replaced? Assuming the spindles are still ok, I hate to think of replacing axles.

Also, the front axle currently has drums and I planned on converting that axle to Kodiak discs. If those brake backing plates are in that bad of shape, why can't I just remove all of the drum assembly, repack and replace the hubs and move the Kodiaks to the rear axle where the brake plates are still good?

Steven


Joe
03-25-2011, 07:55 AM
Don't those backing plates just bolt to the axle? Can't you just replace the plate?

rwidman
03-25-2011, 08:17 AM
About to install my Kodiak discs and stopped when I noticed the caliper mounting plate is only about 1/2 there due to saltwater corrosion. My question is can this be cut-off and replaced? Assuming the spindles are still ok, I hate to think of replacing axles.

Also, the front axle currently has drums and I planned on converting that axle to Kodiak discs. If those brake backing plates are in that bad of shape, why can't I just remove all of the drum assembly, repack and replace the hubs and move the Kodiaks to the rear axle where the brake plates are still good?

Steven

The square brake plates are welded to the axles. There are some arguments on which axle the brakes should be on. It has to do with weight shifting forward when braking and the equalizer springs on non-torsion axle setups. I don't remember so someone else will have to weigh in on this.

In many states, it's a requirement to have brakes on all axles. As one who added brakes to the second axle of a two axle trailer, I can tell you from personal experience, having brakes on both axles is much better. There will come a day when you need all the braking power you can get.


briggss3
03-25-2011, 11:36 AM
The plate is the 4 bolt plate welded to the axle right behind the spindle. I am hoping to just move the discs to the back axle and be done with it. Adding a second set of brakes is not required in Texas and will add $600 in cost if I install. If I have to replace the axles, then that adds another $1000. Of course this is worse case. I will have to assume one axle of Kodiaks will be suffecient.

I wonder if I can burn and grind those rusted plates and and buy some replacements to reweld back on? Or better yet just move the brakes to the rear axle.

LouC
03-25-2011, 02:10 PM
Those plates are welded on, but they have to be welded on square with the axle tube, or else you will have binding problems with the brake pads and rotors....Champion Trailers notes that if you putting brakes on on only one axle on a spring trailer, you should put them on the rear axle....

http://www.championtrailers.com/techsup.html#techretro

sanchoco
03-25-2011, 02:24 PM
I would look at trying to repair those plates. I asked the same question to my (old)trailer guy and he told me that it would be fine to just use the ones that are there. I had to stop hard for a cow walking into the road in Mexico and riped the rotor off that plate on my front axle. both sides went and ended up parting the break lines. As my trailer was in Mexico and had 3 axles and only 2 with breaks I just moved the bad axle to the back and everything has been fine since then. When I get the boat back to Florida I plan on having new plates welded on as the axles have no rust at all. You will have to have the axles re galvanized after the welding.

I have had many trailers with breaks and never seen one with the breaks on the rear axle only. Might be better to switch the axles like I did and keep the breaks on the front.

Fly Rod NYC
03-25-2011, 11:29 PM
Just to add my two cents. I have a dual axle trailer with brakes on the front axle. Last fall I dumped the Tie Down Engineering discs and rotors (basically worthless) and replaced them with the Kodiak dacromet discs and ss rotors. In my case, the backing plates are simply bolted to the spindle mount as seen in this photo (removing the TDE):

https://lh3.googleusercontent.com/_nqdAsaFErr0/TY1_cqv7yYI/AAAAAAAAAQ0/O4JnECha26c/s800/tde_backing.jpg

The Kodiak backing place replacement is shown in this photo (other side of trailer and strange angle, sorry):

https://lh4.googleusercontent.com/_nqdAsaFErr0/TY1_n5M_CDI/AAAAAAAAAQ4/dZPA_leutKs/s800/kodiak_backing.jpg

Notice that unlike the TDE plate, the Kodiak backing plate has an offset. In other words, it is not flat -- it has a "kink" that holds the calipers further out towards the plane of the rotor. I don't know if this is true for all Kodiaks, but this was certainly true for mine (10" rotor, 5 on 4 1/2, 3500 lbs). Fortunately, I had read somewhere -- maybe on THT -- that I had to order these new backing plates in addition to the Kodiak brake kit. The bottom line is that you should be sure that the Kodiak caliper is compatible with your (welded) backing plate in terms of the offset. If not, you might have to work out some sort of work-around or shim.

These are the little details that make the shade-tree mechanic want to pull his hair out. I don't know how we did anything without the internet. ;cool;

Also, I don't think it matters which axle has the brakes, if you are only using one set. The reason there's a overwhelming preference for the front axle is because the brakes are less likely to get dunked if they are in front. Of course, that's just wishful thinking. :roll

Good luck with your trailer. It seems that I spend more time fussing with my trailer than the boat that sits on it.

-- Fly Rod

briggss3
03-26-2011, 10:20 AM
I assume this is an adapter specific to torsion axles. I have the standard tube axle with the 4-bolt plate that the caliper bolts onto. Good to know since I could end up converting to torsion if the spindles are shot when I get in there.

rwidman
03-27-2011, 01:50 PM
My torsion axles had welded on square brake plates. I did not need an adapter to convert from drum (one axle) and none (the other axle) to discs on both axles. Having brakes on both axles makes a big difference. It doubles the braking power.

You don't see cars and trucks running around with brakes on only one axle! ;)

Endtuition01
03-28-2011, 06:54 AM
I have a set of four Kodiak backing plates. Mine came with the kit for 12" rotors and a 5 bolt backing plate. I beleive they are universal for four and five bolt patterns?.
I swaped TDE disk for Kodiak disk but did not need the backing plates that came with the kit. The TDE plates already on the trailer had an offset as well and worked fine.
Free for the cost of shipping from Houston Texas.



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