Electric Over Hydraulic Actuator and Parts to Add Disc Brakes to Third Trailer Axle

Question

Question:

I have a triple axle aluminum boat trailer. My boat is approx 8,000lb with no gear or fuel. I want to convert to electric over hydraulic. What parts do I need? What is the best electric actuator availible? BTW..Only two of the axles have disc brake. The calipers are Kodiak 225. I need to get brakes on the third set of axles. Thanks,

asked by: Ira S

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Expert Reply:

Sounds like you have a surge brake coupler on your trailer currently and are looking for a way to convert it to an electric over hydraulic setup and then also add brakes to your third axle.

The electric over hydraulic actuator I like the best is the Cargo Towing Solutions HydraStar Electric-Hydraulic Actuator for Disc Brakes # HBA16. This actuator has proven to be very reliable and rarely has problems.

The Kodiak 225 caliper that you have on your other axles is a very common caliper that is used on brake axles that are from 3,500 lb to 6,000 lb in capacity. First let's figure out the brake line components needed to add the third axle.

You are going to need 2 of the Tee part # T0778500, 2 of the retaining clips # T0936600, 2 of the # T1062200, 2 of the brackets # T0776300, 2 of the clips # T0776400, and 2 of the hoses # T0776500. See the attached pic to see how all of the components go together.

Now to pick out a disc brake kit you are going to need to know the weight capacity of the axles you have and the bolt pattern of the wheels you have. The axle capacity will be listed on the plate up near the coupler of the trailer. I attached an FAQ on determining bolt patterns for you to check out as well. Let's say you have 3,500 lb axles and have a 5 on 4-1/2 inch bolt pattern. You would want the # K2R35D. This kit uses slip on rotors that will fit on you idler hubs.

expert reply by: Jameson C

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Answer 1

So on the replacement bleed port #KBPBB with a 1/4 inch -28 screw and 1/8 inch adapter. But I am not sure how you would use it as a tee. Adapter port #K22590A has 1/8" NPT and 3/16" FIF threads and might be a better option depending on the…

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Answer 2

The closest battery box to the 6x4x5 dimensions you are seeking is the Battery Box Vented - Marine 24 #DW03009 which has internal measurements of 10-3/4" long x 7" wide x 8-1/4" deep. The breakaway battery boxes like the Replacement…

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Answer 3

If your trailer has a GVWR of 3,750lbs and your boat only weighs 1,460lbs you should be fine with the 3,500LB Leaf Springs #e54SR. I would recommend taking your boat and trailer to a nearby scale to have the trailer weighed to ensure you are under…

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Answer 4

Indirectly yes, the part #T0778500 does get used with brake hoses. If you check out the attached picture you'll see that holds a union tee that hoses run to. We do have clamps that were designed to secure brake lines like with the part #A0500 for…

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Answer 5

Spring Hanger location dimensions are normally figured by the manufacturer and provided with the spring hanger kit, that includes all of the parts for installing the springs on the trailer frame. I have provided a chart that shows the spring hanger…

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Answer 6

Yes, you can replace the 90-degree flare fitting with a straight line on your disc brake installation or you can straighten out the bend in the existing 90-degree fitting. There is less risk of crimping the line when you straighten one out than than…

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Answer 7

Equalizers for trailer suspension have different shapes, lengths, and heights to accommodate different axle spacing, spring lengths, and deck heights. Going to an equalizer that is not the same length and height as the original will require replacing…

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Answer 8

Tot get your equalizer to sit level you basically just need to go with a slightly shorter one (measured from left to right). So what I would recommend is measure the length of what you have and then go with one shorter. Looking at your picture I…

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Answer 9

I do have a potential solution for you. While we do not have an equalizer that matches those measurements exactly, we do have the Curved Equalizer for 1-3/4" Wide Double-Eye Springs #TREQ104. This measures 5-3/4" long and 2" tall. When…

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Answer 10

To determine the location for the front and rear hangers on your tandem axle trailer you will first need to make sure that you have the correct center point for your equalizer hanger. The center point of your equalizer hanger needs to be located…

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Answer 11

The difference in tire diameter will be an additional 2-1/2 inches going from the 225/75-15 which measure 28.4 to the 235/80-16 which measure 30.9 inches. As a general rule of thumb the minimum safe distance between front and rear tires on the same…

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Answer 12

Thank you for providing the specs for the suspension components that you already have. Correct hanger spacing really depends on the components being used such as springs, hangers and equalizers. Most of the hanger spacing dimensions that we have are…

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Electric Over Hydraulic Actuator and Parts to Add Disc Brakes to Third Trailer Axle

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