With your 2004 Featherlite 8127 horse trailer having a 14,000LB GVWR you will have two 7,000lb axles. This will use either the Bearing kit # BK3-200 or # BK3-210. These kits are for 1 hub and have the same bearings with different grease seal sizes. The Kit # BK3-200 includes a grease seal with a 2.25" inner diameter while the Kit # BK3-210 includes a grease seal with a 2.125" inner diameter. There are 2 ways to identify what seal you have. First if your axles still have the manufacturer... view full answer...
The Electric Brake Kit # AKEBRK-7-SA should be what you're needing. Even though these are only rated for up to a 7K axle they should be sufficient for your trailer. All you need to do is verify that the inside diameter of your hub and drum assembly is 12" and that your brakes use the 5-bolt mounting pattern on the back plate. If that matches then this is the route you want to go.
Attached is an installation video that you can reference. view full answer...
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