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

Hey Nick, it sounds like your trailer is a single axle and you are needing a brake line kit for it. For that we have the part #DM5643 which has a 20 foot main line or the part #DM6097 which has a 15 foot main line.

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Answer 2

There is no specific torque rating for securing the Titan coupler #T4853100. What you will need to do is tighten the bolts down as much as you can without crushing the metal of the coupler and trailer tongue. If you see the metal start to bend a…

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Answer 3

Starting with the safety chains they really need to be attached to the trailer frame and not the coupler hardware. If there is no where to attach the chains on the trailer you can weld on safety chain mounting brackets such as #MB12, #MB38, or #MB58.…

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Answer 4

Trailer wheel bearings are specific to the spindle that is installed on the axle that is on your trailer. You will need to safely support the trailer, remove the wheel and tire, remove the grease cap, remove the cotter pin and washer that secures the…

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Answer 5

To determine the size of the brake assemblies you need you have to measure the depth and width of the hub drum on the axle like what you see in the picture I attached. The most common size is 2-1/4 inch wide like the #T4071600-500 that you…

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Answer 6

Two bolts will be sufficient for installing the Demco Hydraulic Brake Actuator #DM72VR. You will want to use two Requires 2-1/2" x 4-1/2" Grade-5 of Grade-8 bolts. Personally I would use something like the Curt Coupler Hardware Kit #C25388.…

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Answer 7

The wires on the Reverse Lockout Solenoid Kit #DM5836 are for the ground and the reverse light circuit. It does not matter which wire you use for the two connections, it will work either way. If you take a look at the installation video below…

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Answer 8

We offer both individual bearings, races, and seals as well as complete bearing kits in many common parts combinations. The best way to know what parts you need is to obtain the part numbers from the existing bearings and seals. The linked photo will…

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Answer 9

You can certainly go ahead and re use the existing 2 bolts, provided they are in good condition. The fish wire method shown in the video works too, but it is also very common to just use the two bolts like your old Atwood actuator. Personally I would…

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Answer 10

I have attached for you below a photo which shows the bolt pattern for the Demco Hydraulic Brake Actuator part #DM72VR.

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Answer 11

Hello Bruno, thanks for reaching out. The Demco #DM72VR can be used to replace your old Atwood 61101. The Demco actuator uses 3 holes and you will need to use all three holes for mounting. If your tongue only has two holes currently, a 3rd hole will…

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Answer 12

Hi Chad! That 4 bolt mounting plate with 2-7/8" measurement is pretty much the standard for 3,500 pound axle brakes (which the Dexter 8-247 drum also fits), so that makes it nice and easy. We have a lot of option, but I recommend the two I have…

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

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