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Do Demco Surge Actuator Couplers and Straight Tongue Couplers Have Same Bolt Pattern  

Updated 06/25/2026 | Published 06/22/2026

Question:

I have Demco Hydraulic Trailer Brake Actuator - Drum Brakes - Zinc Plated - 2 Ball - 6,000 lbs ITEM 8605001, and the replacement option is Demco Hydraulic Brake Actuator - Drum - Zinc - 2 Ball - 7,000 lbs Part Number: DM72VR However I switched to Electric Brakes and no longer need it and would like to install a Demco Channel Tongue Trailer Coupler - eZ-Latch - Zinc - 2 Ball - Bolt On - 7,000 lbs Part Number: DM15945 However there is no bolt pattern information for a 3 inch tongue 3 bolt. I dont want to assume its same pattern as mentioned above with the 3 3 bolt to 1 7/8 inch to lower bolt that is triangled.

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Expert Reply:

Hey Curtis, this is a great question but yes the bolt pattern between the actuator part # DM72VR and the coupler part # DM15945 is exact same so this would bolt right up without requiring any additional drilling. How do you like the electric brakes compared to surge?

expert reply by:
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Jameson C
Scott F. profile picture

Scott F.

6/25/2026

The bolt pattern is the same. I have done several of these going both directions, from the hydraulic and to the non-hydraulic, and the hole pattern was the same.

Jameson C. profile picture
Etrailer Expert

Jameson C.

6/25/2026

@ScottF thanks for the feedback we appreciate it!

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