Actuator/Coupler Replacement for 85841 on Sea Ray Boat Trailer
Updated 08/30/2021 | Published 08/29/2021
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
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.
Product Page this Question was Asked From
Demco Hydraulic Brake Actuator w/ Electric Lockout - Disc - Zinc - 2" Ball - 7,000 lbs
- Brake Actuator
- Surge Brake Actuator
- Boat Trailer
- Construction Trailer
- Farm Trailer
- Travel Trailer
- Utility Trailer
- Bolt-On
- 7000 lbs GTW
- 2 Inch Ball Coupler
- 3 Inch Channel Tongue
- Disc Brakes
- Electric Lockout
- Demco
more information >
Continue Researching
- Video: Replacement Emergency Lever for Demco Hydraulic Trailer Brake Actuator Review
- Shop: Replacement Emergency Lever for Demco Hydraulic Trailer Brake Actuator
- Q&A: How Does Breakaway Lever of Demco DA91 Actuator Reset
- Q&A: How to Reset Demco Surge Actuator
- Article: How to Bleed Your Trailer Surge Brakes
- Article: Hydraulic Trailer Brakes: How They Work & What to Buy
- Shop: Dexter Zinc-Plated Brake Actuator - Disc - Multi-Fit Ball - Bolt On - 7,000 lbs
- Shop: Demco Hydraulic Brake Actuator w/ Electric Lockout - Disc - Zinc - 2" Ball - 7,000 lbs
- Shop: Demco Surge Brake Actuator w Drop and Electric Lockout - Disc - Zinc - 2-5/16" Ball - 12.5K
- Q&A: How to Verify a Trailer Surge Brake Actuator is Still Working
- Article: Trailer Wiring Diagrams
- Shop: Trailer Hitch
- Shop: Curt Powered Tail Light Converter with 4-Pole Flat Trailer Connector
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Search Results: trailer hitch
- Shop: Trailer Wiring
- Shop: Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires
- Search Results: trailer tires and wheels
- Q&A: Lug Nut Torque Chart for Trailer Wheels
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Video: How to Choose a Trailer Brake Controller
- Shop: Suspension Enhancement
- Search Results: trailer wiring
- Q&A: Installation Time for Blue Ox BX1128 Flat Tow Base Plate Kit for 2016 Jeep Grand Cherokee
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Shop: Power Mountain Tallboy Off-Road Bottle Jack - 8-1/2" to 37-3/4" Lift - 6 Tons
- Shop: Brake Controller
- Article: How to Measure Your Trailer Wheel Bolt Pattern
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
- Search Results: trailer jack
on Brake Actuator
