Bolt Pattern of 7k Demco Hydraulic Brake Actuator For Disc Brakes

Question

Question:

What is the bolt pattern to attach Demco DA70 Surge Brake Actuator w/Solenoid to the trailer tongue?

asked by: Scott V

0

Expert Reply:

The top bolts are 3 inches apart on center, and the bottom bolt is 2 inches underneath those (and directly in the middle of the top bolts) for the 7,000 lb Demco Hydraulic Brake Actuator w/ Electric Lockout - Disc Brakes # DM62VR.

You'll need 2-1/2" x 4-1/2" Grade-5 bolts for the install of the # DM62VR, and I have added a link below to a video install for you which may help.

expert reply by: Kyle S

0

Demco Actuator Bolt Holes
(click to enlarge)

Answer 1

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Answer 2

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Answer 3

Hey Richard, thanks for reaching out! The Dexter DX7.5 Drop-N-Go Brake Actuator #099-175-00 is a great option for a replacement actuator because it's a direct replacement for the common Model 60 actuators that were popular in the '90s.…

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Answer 4

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 5

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Answer 6

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Answer 7

The replacement I recommend for an Atwood Surge Brake Actuator 85778 is the Demco Hydraulic Brake Actuator part #DM62VR. It has the same ball size, offers a bolt-on install, and has a greater capacity. The only difference is it has an electric…

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Answer 8

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Answer 9

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Answer 10

Even though I cannot comment specifically on the grease you used because I am not familiar with it, I can tell you the best grease for trailer bearings is a a grease with a rating of GC-LB, which just means it is made to withstand very high…

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Answer 11

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Answer 12

Depending on how the trailer was made, there will be a few spots you can check to identify the axle. First, if the trailer was pre-made by a specific company, you may be able to find this information in either the paperwork or on a placard somewhere…

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