Converting to Disc Brakes For Trailer With Bearings 14125A & 25580 w/ 8 on 6-1/2 Bolt Pattern

Question

Question:

Thanks for answering my question, I checked out the product recommendation you made and have two follow up questions: - This is for a boat trailer, would the Dacromet finish version be better for a trailer that is frequently exposed to saltwater? - I am also planning to replace the surge brake actuator and brake lines. The surge brake actuator that is currently on the trailer is a titan model 20, welded to the frame. I’m thinking of replacing it with a titan model 10, zinc finish bolt-on version. The guy who built the trailer liked to ‘over-build’ everything, so i’m wondering if that 20,000 lb capacity actuator is really necessary - especially considering even the 12,500 capacity actuator is still above my trucks towing capacity. I just want to double-check that there wouldn’t be any issues with this. Specifically, looking at the Item # T4750620 actuator. The trailer is a very heavy steel trailer, probably about 2000-2500 lbs by itself. Thanks again,

asked by: Alex R

0

Expert Reply:

Thanks so much for that info, and the 1.75" measurement you got for the inner bearing means that is a 25580 bearing; along with the outer bearing 14125A and the 8 on 6-1/2" bolt pattern, we can get you the correct disc brake hub and rotor to replace your drum brakes; what you will need is the following:

- Kodiak Disc Brake Kit - 13" Hub/Rotor - 8 on 6-1/2 - Raw Finish - 7,000 lbs # K2HR712

- Bearing Kit for Trailer Brakes with 13" Hub/Rotor and 1/2" Bolts - 7,000 lbs # DBRKHW7

The # K2HR712 disc brake kit comes with the races but not the bearings or grease seal, which is why you'll need those. The hub on this brake kit uses 1/2" wheel studs, and mounts to a 5-bolt brake flange.

expert reply by: Kyle S

0

Alex R.

4/13/2022

Thanks for answering my question, I checked out the product recommendation you made and have two follow up questions: - This is for a boat trailer, would the Dacromet finish version be better for a trailer that is frequently exposed to saltwater? - I am also planning to replace the surge brake actuator and brake lines. The surge brake actuator that is currently on the trailer is a titan model 20, welded to the frame. I’m thinking of replacing it with a titan model 10, zinc finish bolt-on version. The guy who built the trailer liked to ‘over-build’ everything, so i’m wondering if that 20,000 lb capacity actuator is really necessary - especially considering even the 12,500 capacity actuator is still above my trucks towing capacity. I just want to double-check that there wouldn’t be any issues with this. Specifically, looking at the Item # T4750620 actuator. The trailer is a very heavy steel trailer, probably about 2000-2500 lbs by itself. Thanks again,

Reply

Kyle S.

4/13/2022

Let's start with the hub and rotor disc brakes, and since this is a saltwater application, brakes that have a coating are definitely the way to go, and the Kodiak Dacromet-coated brakes have a 300-400 hour salt spray rating. You'll still need the seal and bearings along with the brakes: - Kodiak Disc Brake Kit - 13" Hub/Rotor - 8 on 6-1/2 - Dacromet - 7,000 lbs # K2HRCM1337-9DAC - Bearing Kit # DBRKHW89G I wanted to note real quick that the # K2HRCM1337-9DAC uses outer bearing 02475 instead of 14125A, but the two bearings have the same inner diameter, so it will still fit your spindle. In regards to the actuator, there is no issue whatsoever replacing a 20k actuator with a 12-1/2k actuator. The actuator simply needs to meet or exceed the capacity of the loaded trailer you're towing. And if it's rated for higher than your truck can tow, you're set to use the Titan actuator: - Titan Zinc-Plated Brake Actuator w/ Drop, Electric Lockout - Disc - 2-5/16" Ball # T4750620 Finally, you'll also need brake lines for disc brakes, and based on the weight I'm going to assume you have a tandem axle trailer, so you can use either the Kodiak Hydraulic Brake Line Kit - Tandem Axle - 20' # 20TA-BLKIT.

Reply

Answer 1

Even though I cannot comment specifically on the grease you used because I am not familiar with it, I can tell you the best grease for trailer bearings is a a grease with a rating of GC-LB, which just means it is made to withstand very high…

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Answer 2

The only difference between the HydraStar Disc Brake Kit with Actuator for Tandem Axle Trailers - 7K part #HSE7K-T1SO and part #HSE7K-T1 is that the latter comes with the hub which is integrated into the rotor. The former does not come with a hub and…

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Answer 3

I wasn't able to determine which axles you have on your trailer, but since there is a chance they could have been changed at one point the only solution I can provide would be to check your current setup to find the correct bearings. The only two…

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Answer 4

We do have a hydraulic disc brake kit that will fit 8 bolt hub, 8 on 6-1/2 Inch bolt pattern, 1/2 inch bolts. In addition to a hydraulic disk brake kit, you will also need a brake line kit, and a electric over hydraulic actuator, and a brake…

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Answer 5

The correct replacement grease seal for seal number 470361 is part #RG06-050 for a pair or part #58846 for a single seal. Part #168255TB has a smaller inner diameter than your current seal.

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Answer 6

Assuming you have drum brakes, the Demco Hydraulic Brake Actuator - Drum - Zinc - 2" Ball - 7,000 lbs #DM72VR will work well as a replacement for your Atwood 61101. If you have disc brakes, I recommend the Dexter #099-175-20 which comes with an…

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Answer 7

DOT 3 or DOT 4 brake fluid is recommended for Demco brake actuators like the #DM72VR. You should never use DOT 5 as it will wear out seals very quickly.

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Answer 8

We do not have a Kodiak disc brake caliper cross reference to automotive calipers but for the brake pads there are cross referenced parts. If you refer to the linked image you'll see a partial list of cross-compatibility of brake shoes for GM…

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Answer 9

There isn't any. The HydraStar Disc Brake Kit #HYD54FR uses 9/16" wheel studs while the HydraStar Disc Brake Kit #HSE7K-TR1 uses 1/2" wheel studs. Attached is an installation video that you can check out.

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