Actuator/Coupler Replacement for 85841 on Sea Ray Boat Trailer

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Question:

So I have a 24foot Sea Ray trailer made by Roadrunner of Texas who is no longer in business. I have the 85841 master cylinder on it and hasnt worked since my purchase of the boat 10 years ago. Obviously I cant find one, well someone on Ebay has one for $400 which I may have to do. But everything I see about this master cylinder says drum brakes. My trailer has a tandem axle with disc on the rear axle only. Is it the right one? And I was looking at the complete units with the ball socket too, however my unit is welded onto the actual trailer and would need to be cut out and rewelded. Will any of your complete units work for this? 2inch ball.

asked by: David J

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Expert Reply:

Since your trailer has disc brake it will be very important that you pick out a actuator/coupler that is rated for that and not drum brakes as that is a lower pressure rating that won't work well. The 85841 is no longer made so it would be tough to find so I would recommend going with a new coupler setup like the # DM62VR which you could bolt onto your frame once you cut off the older welded on model. If you wanted to weld this in place of what you have you certainly could do that as well.

expert reply by: Jameson C

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Answer 1

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 2

We sure do! The only front hitch that is compatible with the 2023 Ram 3500 with a diesel engine is the EcoHitch item #EH37FR. This hitch is custom fit and bolts to your Ram with included hardware. I have linked an installation video below to help you…

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Answer 3

Hey Jeff, appreciate all the details you provided that was super helpful and we do have the MORryde cushioned pin box that is designed to replace a Lippert Rhino pin box. For the 17,695 lb GVWR you mentioned on the 2024 Brinkley Model Z 3610, what…

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Answer 4

The Access Toolbox Edition Soft, Roll-Up Tonneau Cover #A93VR is designed to fit the youru 2022 Ram 3500 with a 8' dually bed. The Cover #A37FR will only fit an 8' bed with single rear wheels. This is the only difference in these covers is…

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Answer 5

Hey David, from previous customers of ours who have the same 2020 Keystone Raptor 424 we have determined that your pin box style is the Lippert 1621 which means for a Gen-Y gooseneck adapter you'd want the #GY58GR that you referenced.

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Answer 6

Hi Richard; your feet or the pucks probably aren't perfectly straight. What you can do is loosen the castle nut on the feet of your #RP37FR. You should be able to get it in once it can move around a little and align properly. After you get it in…

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Answer 7

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 8

If you have the Gooseneck versions of the Curt CrossWing ( #C92DR or #C32DR) you unfortunately would not be able to use the Rota-Flex with it. The pivoting head causing too much strain for the single point of contact you have with a gooseneck hitch.…

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Answer 9

Your surge coupler will have either a sticker or an engraving on it, typically near where the coupler is located. If you can get me that information and what you're needing to replace on it I'd be more than happy to help you find what…

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Answer 10

Lance does have a proprietary plug, but many customers see a standard 6-way or 7-way round and notice it doesn't fit their factory 7-way as well. I've attached an article to help if you have one of the 7-way or 6-way round connectors which we…

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Answer 11

The Replacement Shock Absorber Spring Kit #TK71-758-00 is the correct shock for your UFP Surge Brake Actuator. The picture you included does not specify if it is for a disc or drum brake set, so I have found both for you to choose from. Disc Brake…

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Answer 12

Yes, you can weld on the Dexter DX7.5L A-60 Brake Actuator w Electric Lockout - Bolt On - Disc - 2" Ball - Zinc - 7.5K item #DX56FR you referenced. You will want to make sure you remove the zinc coating and get down to the bare metal. I have…

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Actuator/Coupler Replacement for 85841 on Sea Ray Boat Trailer

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