Correct Replacement Brakes and Hub/Drum Assembly for '97 Jayco Popup

Question

Question:

Hi, I recently had my breakaway activate while driving and ended up burning up my brakes. Im replacing my hubs/drums which houses hydraulic brakes. The drum is stamped with HD-700A, which appears to sell for 1inch spindles with L44643 inner/outer bearings. Trouble is, my spindle is BTR 1.063 and my bearings are L44649. So, Im looking at your part # Code: 8-276-5UC3 or 8-173-16UC3 Im not sure I see the difference. Are these the replacement for my hubs? My trailers GVWR is 2450, which is over the weight stated for these products 2200. However, I cannot find anywhere any 4 on 4 hubs sold with higher weight ratings. Any guidance you can provide here would be great. Finally, due to the high heat buildup during the actiation of the breakaway while I was towing, Im planning on replacing the hydraulic break assemblies including backing plates. Is there anything else I should consider replacing as a result of this incident? Thank you for your time,

asked by: Philip A

0

Expert Reply:

The difference between part # 8-276-5UC3 and part # 8-173-16UC3 is that the 5UC3 works with a 7" x 1-3/4" brake assembly while the 16UC3 works with a 7" x 1-1/4" brake assembly brake assembly. Other than that they use # L44649 inner and outer bearings and a 10-9 grease seal that has the 1.5" inner diameter. You definitely want to go with assemblies that match your bearings so if you're able to confirm that you have L44649 bearings then I'd use one of the options mentioned above.

The GVWR of a trailer is typically a little more than the axle weight rating(s) simply because there will be some tongue weight that is either handled by the trailer jack or the tow vehicle. That's why you're having trouble finding something rated all the way to 2,450 lbs.

To replace your brakes we have the brake kit # 23-398-399 which measure 7" x 1-3/4" so you'll want to pair these with the assembly # 8-276-5UC3.

Definitely check your trailer tires for bald spots. If your breakaway kit worked like it should have then your trailer brakes would have locked up and your tires should be pretty damaged on one side. If you can let me know what size tires you have (you can see this on the sidewall) then I can make a recommendation for you.

expert reply by: Jon G

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Answer 1

I can absolutely understand not wanting to take your hub apart to find the right replacement hub, but unfortunately that is the only option as the numbers you referenced are not any type of indicator of a replacement. So, to determine the correct hub…

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Answer 2

I've linked you to an FAQ article that explains how to determine your wheel bolt pattern. The 4 bolt brake mounting flange has a standard bolt pattern of 2-7/8 inches center to center between adjacent holes or 4 inches center to center measured…

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Answer 3

Brake replacement really isn't bad. It's really just a matter of pulling off the wheels and hubs and then unbolting the assemblies and replacing them with new ones. If you check out the attached video link down below you can see the install…

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Answer 4

Keep pumping grease into the fittings until you start to see a little grease seeping through the outer bearing. This means that you have packed as much grease as will fit into your spindle. Be sure to check that the grease isn't coming out the…

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Answer 5

The manual lockout on your Atwood 85778 surge brake coupler is there so that you can back up the trailer without the brakes locking up on you. Yes you can safely tow your trailer with the broken manual lockout, you just have to make sure you…

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Answer 6

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 7

You are correct that this refrigerator does not have an ON/OFF switch or function. The best you can do is "Standby" that draws an unknown amount of power. One option is to pull the 12-Volt fuse at the RV power center. A much better option…

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Answer 8

To determine the size of the hub assembly you need to purchase you have to determine which bearings are in the old assembly. If the old assembly has L44649 inner bearings, you would use the hub you chose #8-258-5UC1. If the inner bearings are marked…

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Answer 9

Traditionally, trailer manufacturers did not use electric brakes on boat trailers because the brake magnet wiring and trailer wiring did not always have the best insulation or water protection. These days, more and more manufacturers are using…

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Answer 10

Torque specs for wheel lug nuts will vary depending on the diameter of the lugs, type of lug nut and the wheel's material. The linked chart details the recommended torque for many combinations. Dexter Hub/Drum #84546UC3 has 1/2-inch studs and…

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Answer 11

I currently have three diffrent self-adjusting assemblies for your boat trailer with 10" x 2-1/4" electric drum brakes which are attached for you below. eTrailer Electric Trailer Brake Kit part #AKEBRK-35-SA (3,500 Axles) Dexter…

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Answer 12

You will have to go with a sliding hitch to allow the trailer to make tight turns. For a trailer 8 feet wide the only bed length that's going to allow 90 degree turns without a slider is a stationary hitch. That being said you have two options.…

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