Recommended Disc Brake Kit For 20 Foot Boat Trailer

Question

Question:

Have you ever seen rubber brake line clogged blocked? I am trying to revive a 20 boat that has been sitting for 10 yrs. It has surge brake and when I tried to bleed by vacuum, vacuum held. Then I opened up the brake and I see the wheel cylinder is all corroded. Then I replaced it with a new one. Still I could not bleed. I disconnected the actuator, the vacuum still held. There should not be any one-way valve in the brake line, right? Only thing I could think of is the rubber brake line joining the T-connector to the metal line going up to the tongue is clogged? I goggled around and saw these rubber brake line can be getting rusty and swollen inside. There is a coupler connection at the actuator end. See attached. Does it look like some quick stop coupler? Even with that little pin pulled in, I can squeeze any brake fluid out when I pump the coupler. So, I need to unclog the line by replacing the rubber ones if they are the problem, to rebuild or replace the hydraulic surge brake actuator, and I should, mind as well, convert to disc brake. Which disc brake kits are for marine? K2R35E, K2R35, or K2R35D?

asked by: Derek C

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Expert Reply:

Brake lines can get clogged, and most of the time it has to do with someone not being careful when adding fluid and getting small particles inside instead of having disintegrated parts due to corrosion.

To upgrade to disc brakes, you will basically need to replace everything except the brake lines which can be blown out with compressed air. The coupler will require a stronger master cylinder for disc brakes vs. drum brakes because disc brakes require 1600 psi where drums require 1000-1200 psi.

For your boat trailer, I recommend the Titan Disc Brake Kit and Leverlock Actuator w/ Electric Lockout - Single, 3,500-lb Axle # T4843300. These brake caliper have the dacromet finish and the actuator has a zinc plating...both prevent corrosion and work well on boats. This will come with all the brake lines, the bearings, and Bearing Buddy covers.

If you prefer, you can use the Kodiak # K2R35D, # K2R35DKG, or # K2R35DS. Each of which will work well for marine use.

expert reply by: Jason S

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Answer 1

The Mounting Bolts and Hardware #BRKH10A that you referenced are designed to be torqued 45 to 50 ft lbs of torque since they are designed to fit 10 inch brake assemblies.

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Answer 2

Installing disc brakes on your trailer that has drum brakes now will require new brake assemblies and also a new actuator that can provide the higher hydraulic pressure needed by disc brakes. You can stay with a straight hydraulic setup like you have…

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Answer 3

The Kodiak Disc Brakes for 3,500 lb Axles #KOD59FR have a KodaGuard coating on the brake calipers which gives them a 500 to 600 hour salt spray rating and makes these a great option for trailer owner's who either live near salt water or go…

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Answer 4

Adding a disc brake system will be a great addition to your Magic boat trailer. The parts you will need are a brake mounting flange, spindle, disc brake assembly, hydraulic disc brake actuator and brake line kit. I recommend the Kodiak disc brake kit…

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Answer 5

Both of these manufacturers make excellent products and both products have received excellent customer reviews. The main difference is that the Kodiac Disc Brake Kit and Titan BrakeRite Electric-Hydraulic Actuator, #T4843800, which you referenced,…

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Answer 6

I have a great solution for you, but Tie-Down disc brake systems have a pretty poor reputation. They are known to have issues like what you described as well as rotor warping. The most common recommendation is to ditch them and go with Kodiak…

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Answer 7

You are correct, the bolts for the mounting bracket are not included with the Kodiak Disc Brake Kit - 10" Rotor - 5 on 4-1/2 - Dacromet and KodaGuard - 3,500 lbs #K2R35DKG. What you need is the Brake Mounting Bolt for 7" and 10" Brake…

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Answer 8

I spoke with my contact at Kodiak about the Kodiak Disc Brake Kit, part #K2R35DS, and found out what is included and what you would need to supply. Basically, all you will need to supply is the bolts that the bracket to the axle. Other than that…

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Answer 9

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 10

To determine the size of the brake assemblies you need you have to measure the depth and width of the hub drum on the axle like what you see in the picture I attached. The most common size is 2-1/4 inch wide like the #T4071600-500 that you…

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Answer 11

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 12

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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