Parts Needed to Add Disc Brakes to Drum Brake Trailer

Question

Question:

I have a Attwood #83010 and would like to upgrade to disk brakes, do you have a kit, 5 lug 3500lb boat trailer dual axle brake on single

asked by: John

0

Expert Reply:

If you have Atwood surge coupler # 83010 and you want to convert the trailer from drum brakes to disc brakes on one axle you will need to either replace the coupler or replace the master cylinder inside it with one that delivers the higher psi pressure required by disc brakes. Disc brakes need psi pressure in the 1500-1600-psi range so a new 8K-rated actuator/coupler like # T4747220 is needed.

If the trailer has two 3500-lb axles (which would be expected if it has the 8K-rated Atwood coupler 83010) then you will want to install the brakes on the rear axle where most of the boat weight will be. You will need a disc brake kit for a 3500-lb axle like one of those show on the linked page, such as # K2HR35DS. Note that these kits are compatible with specific wheel sizes.

The kit has to use the same bearings as your original hub/drums in order to fit on your spindles. The kit noted above uses inner bearing # L68149 and outer bearing # L44649.

You do NOT have to replace the brake lines on the trailer unless they are damaged. Please refer to the linked articles on adding disc brakes to trailers.

expert reply by: Adam R

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Answer 1

If you installed your Titan Solenoid Valve #T4748800 downstream of your master cylinder for reasons of space it will still operate properly according to my contact at Titan. It does however need to be oriented in one specific direction. The brake…

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Answer 2

I was unable to find an order number for you so I'm not entirely sure what you have, but were you referring to the Replacement Master Cylinder Cap with Diaphragm for Titan Model 10 and 20 Brake Actuators #T4830601? I only ask because there is not…

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Answer 3

The Titan disc brake master cylinder orifice is #T4750300. Or you could change out the master cylinder on your Titan model 60 actuator with the disc brake version, #T4820000, and get all new parts. It fits right in place of the original. A lockout…

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Answer 4

You are correct that disc brakes require an actuator with higher psi pressure than what is required by drum brakes. Drum brakes need pressure of 1000-psi but discs need 1500 to 1600-psi. You can convert your Titan Surge-O-Matic Model 6 actuator to…

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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

If your current springs have 5 leaves then going to a 7 leaf spring will increase the height of the trailer a little and make the trailer more susceptible to sway. Regarding capacity if you go with springs rated higher than what is required it will…

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Answer 7

The correct replacement for a Demco Master Cylinder 05680-C is the Replacement Master Cylinder part #5650. I spoke with Demco to confirm this for you.

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Answer 8

For the LCI52-SB-86.5-68.5, the two ending measurements are: 1st - measurement from hub to hub, meaning the length of the axle in this case is 86.5 inches. 2nd - spring seat dimension where they're welded, meaning the spring seats are 68.5 inches…

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Answer 9

If you are installing just the Firestone Ride-Rite kit, #F2400, and not also adding an on-board air compressor such as #F2158, then I would estimate that it should take about 2 hours to install the kit. That is for someone with some mechanical…

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Answer 10

The correct replacement master cylinder kit we have for your Demco setup is the part #DM5918 which comes with the lock out replacement.

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Answer 11

I would be happy to help you set up your 2022 Toyota Highlander to haul your new travel trailer. The wiring harness you currently have controls your trailer's lighting functions only. You do not need to rewire your Toyota you just need another…

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Answer 12

I agree it is the right time to upgrade to a Lithium charger/converter as not all are Lithium compatible. I recommend using the Progressive Dynamics Mighty Mini AC/DC Panel and Converter/Smart Charger - 60 Amp #PD4060K which is a replacement for your…

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