Thread Size of Brake Line for the DA66B Demco Hydraulic Trailer Brake Actuator

Question

Question:

What is thread size for the brake line is on this actuator?

asked by: Michael K

1

Helpful Expert Reply:

The Demco Hydraulic Trailer Brake Actuator # DM72VR accepts a standard 3/16 inverted flare brake line. I reached out to my contact at Demco who confirmed this.

expert reply by: Jon G

1

Answer 1

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 2

The Orifice will tighten until it bottoms out inside the Master Cylinder #5650 on the Actuator #DM72VR. The technician at Demco said there is not an exact torque figure they can give, just to tighten it until you feel the threads stop. The threads do…

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Answer 3

As you are converting your surge trailer with disc brakes you will want to go with the Hydrastar Marine Electric Over Hydraulic Actuator w/ Breakaway and 7-Way RV Harness #HS381-9067. This kit will include the junction box to run your wiring, a…

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Answer 4

Below is the general process for bleeding an electric over hydraulic brake actuator like #K71-650. Fill reservoir with NEW brake fluid. Never re-use brake fluid that has been salvaged or removed from another system. Remove the key from the breakaway…

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Answer 5

Hydraulic drum brakes operate at around 1,000 psi where disc brakes are higher at about 1,500 psi. So the maser cylinder for disc brakes, part #5672, is not the same as what you need. Instead you need the master cylinder for drum brakes, part #5650.

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Answer 6

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

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Answer 7

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 8

The Demco Hydraulic Trailer Brake Actuator part #DM72VR should be a direct replacement for the Atwood 61101 Brake Actuator that you have now. This newest updated it rated at 7K instead of 6K. This is a bolt on option that mounts on 3" centers.…

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Answer 9

According to Blue Ox, it'll take an experienced installer about 4 to 5 hours to complete the installation of their #BX1128 Base Plate Kit on a 2016 Jeep Grand Cherokee. The install isn't what I'd call super-difficult, but the installation…

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Answer 10

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

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Answer 11

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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Answer 12

It sounds like you are speaking of the wires for the brake magnets. If this is correct, you will need to connect one of the wires to the brake controller output wire on your trailer connector and the other wire will need to be grounded to a clean…

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Thread Size of Brake Line for the DA66B Demco Hydraulic Trailer Brake Actuator

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