Is There Manual Lockout Available for Demco Surge Actuator part # DM72VR

Question

Question:

I would like to purchase a DM72vr coupler but need a manual lockout is this possible?

asked by: Kevinkgoodwin

0

Expert Reply:

Demco does not offer a manual lockout for the coupler part # DM72VR but they do offer an electric option with the part # DM5836. They also recommend installing free-backing brake assemblies on the axles instead too which I attached a link to a page that has all of them.

expert reply by: Jameson C

0

George

5/13/2025

Is the free braking brake assembly necessary? Or can I just use the electric reverse brake lockout? I'm replacing an old surge brake assembly with drums

Jameson C.

5/13/2025

@George If you have an electric or manual lock out then you do not need to use free-backing plates. There's no reason you couldn't use them but they are redundant and not needed.

Answer 1

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 2

For as trashed as those brake assemblies are I am impressed with how spotless that spindle is! Based on the bearing numbers you mentioned you have a #84 spindle and the hub part #AKHD-545-35-G-K is correct. Since this its galvanized it's a really…

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Answer 3

The Demco Hydraulic Brake Actuator #DM72VR will replace your Atwood 171 actuator. This surge brake actuator will work for drum brakes and has no reverse lock out but is recommended that you equip your trailer with free-backing brakes so you can drive…

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Answer 4

An electric reverse lockout solenoid like #T4748800 from Titan and #DM11993 from Demco does have two pigtail leads. These leads are non-polarized, so either wire can be used as ground or hot. We are not familiar with any single-wire self-grounding…

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Answer 5

The reverse lockout solenoids stop brake fluid from being released from the master cylinder and sent to the wheel cylinder. It does this by receiving an electric signal, usually from the reverse light circuit. That said, if you were to wire this into…

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Answer 6

It looks like that is a piece of flexible brake line you are using. You would need standard flexible brake line with a 3/8 inch male fitting. We offer them in varying lengths. A 13 inch long brake line with fittings (male on one end, female on the…

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Answer 7

How long of a line do you need? Do you know what size you need? The most common size is 3/16 inch like part #BH-3MFS-4-5 which is 54 inches long.

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Answer 8

I recommend replacing your entire brake actuator on your 2000 Jayco 12 tent trailer. The Demco Hydraulic Brake Actuator #DM72VR is a bolt on actuator that will mount to your 3" channel like the Atwood 85830. This is the best route to go as it is…

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Answer 9

It sounds like you may have missed a few steps when attempting to bleed the brakes with your new Demco actuator, like part #DM72VR. I'm attaching a link to the instructions on bleeding the brakes for you to reference. Let me know if you've…

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Answer 10

I have attached an image from the operation manual for the Demco Hydraulic Brake Actuator #DM8669112 that details how to bleed the brakes. The process consists of first elevating the trailer tongue about 4 to 6 inches and then loosening or removing…

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Answer 11

Since Atwood went out of business none of their actuator (or other product) replacement parts are available unfortunately, so your only real option to having a working actuator is to replace the entire unit. I am attaching a link to our selection of…

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Answer 12

Hey Bryan! To find replacement brakes we need to either identify your axle or at least know the size and the brake flange bolt pattern. The best way to identify the axle is with the axle tag. Are these electric brakes or hydraulic? If I had to guess,…

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Is There Manual Lockout Available for Demco Surge Actuator part # DM72VR

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