Replacement for ACT-7.5K Actuator on Mastercraft Boat Trailer

Question

Question:

We have a single axle Mastercraft boat trailer with disc brakes. It has a Reliable actuator on it that we need to replace. Model # on the actuator says ACT-7.5K. What would be a good replacement? Thanks

asked by: Austin B

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Expert Reply:

For a replacement option I recommend the Dexter DX7.5L A-60 Brake Actuator w Electric Lockout # DX89FR. Any swing-away actuators like your ACT-7.5K have been discontinued so this is the best solution. This has a 7,500 lb trailer capacity, is designed for trailers with disc brakes, and is a bolt on replacement.

More than likely you will also need a replacement swing away tongue adapter like the Fulton Fold-Away Coupler Hinge Kit for 3" x 4" Tongue # FHDPB340301 which fits 3" x 4" diameter tongues. This would allow you to replace the folding part of the tongue and add the new actuator.

I have attached some installation and review videos for your reference.

expert reply by: Robin H

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Answer 1

Hello James. The Dexter DX7.5L A-60 Brake Actuator w Electric Lockout #DX89FR is designed to work with a 3" wide trailer tongue.

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Answer 2

The Dexter DX7.5L A-60 Brake Actuator part #DX89FR for disc or part #DX33FR for drum will work to replace the surge coupler of your Mastercraft boat trailer. I looked up your trailer and was not able to determine if it had disc or drum brakes which…

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Answer 3

Hey Al, this is a great question but since you have free-backing plates now you would never need to mess with the manual lock out of your Atwood coupler.

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Answer 4

It sounds like you have a UFP A-60 brake actuator on your EZ Loader trailer. The #T43397007K is designed for drum brakes so this would not be a suitable replacement. Instead, I recommend the Dexter DX7.5L A-60 Brake Actuator w Electric Lockout - Bolt…

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Answer 5

That's a really good question, and there is a difference between the 7,500 lb Dexter DX7.5L A-60 actuators for disc brakes; the differences are both in what they fit, as well as their length. - 14" Long & Top-Mounted For 3" Wide…

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Answer 6

If you don't mind drilling Jeremy I would recommend using all three mounting holes of the Dexter Actuator part #DX89FR or if you know a welder just have them weld it to the trailer. If you were going to only use two though use whichever two line…

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Answer 7

I recommend using the Hydraulic Brake Kit - Uni-Servo - Free Backing - Dacromet - 10" - Left/Right Hand - 3,500 lbs #AKFBBRK-35-D, which will work with your current setup and are perfect because the Dacromet plating is designed to withstand…

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Answer 8

When it comes to upgrading your UFP DB-42 brakes The Kodiak Disc Brake Kit - 10 inch Hub/Rotor - 5 on 4-1/2 - Dacromet - 3,500 pounds #K2HR35D will upgrade your braking system. This kit is coated with a Dacromet coating that helps prevents corrosion…

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Answer 9

Thank you for the photo, that was helpful, and while there are no specific replacement parts for your trailer, there may be an option that will work. I say "may" because there aren't brake kits for 5,000 lb axles, and I'm not quite…

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Answer 10

The Kodiak Disc Brake Kit #K2R35S can fit on a trailer with 14 inch wheels as long as the axle is a 3,500 lb axle and has brake flanges behind the spindle like in the picture I attached.

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Answer 11

I couldn't find too much information on your current brakes but if they're 10 inch rotors that slide over hubs then part #KR10S works as a stainless steel replacement. You can also use part #K2R35S as a kit that includes the calipers,…

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Answer 12

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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