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Disc Brake Kit for 5th Wheel Trailer That Uses 8-Lug Wheels on 6000-lb Dexter Axles  

Question:

I am looking for a disc brake kit that will fit my 5th wheel. I have 6000lb lippert axles with 8 lugs. In your 6000lb kit list, I noticed all of the hubs had 6 studs. Will 7000lb kit fit?

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Expert Reply:

The key to selecting disk brakes for your 5th wheel is to match up the bolt pattern (in your case 8-on-6-1/2) as well as the brake flange mounting hole pattern, bearing set and axle weight capacity. It is fine to use a brake kit rated higher than your axle capacity, but never one rated lower.

You need to match your hub's bearings to the new kit to ensure that the hub/rotor assemblies will fit your spindles. The Kodiak Disc Brake Kit # K2HR712 that you referenced has the bolt pattern and capacity you need. It uses a 5-bolt brake flange and the following bearings, races and seal:

Inner bearing: # 25580
Outer bearing: # 14125A
Inner race: # 25520
Outer race: # 14276
Seal: # RG06-070

You'll want to check your existing hubs' bearings/races/seal part numbers to ensure a proper match. Please see the linked photo. The other items you'll need are a brake line kit like # 20TA-BLKIT, electric-over-hydraulic (EOH) actuator like the HydraStar # HBA16 and a trailer brake controller that is compatible with EOH system, such as the Prodigy P3 # 90195.

The linked article covers each of these items in detail and will give you a complete breakdown of the process to convert your 5th wheel from electric brakes to EOH disc. The other link included will let you see all 7000-lb-rated disc brake kits.

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Adam R
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Instructions for 90195Instructions for K2HR712

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Trailer Brakes - Disc Brakes 7000 lbs Axle
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Adding Electric Over Hydraulic Disc Brakes
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