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

Hey Mark, yes the Demco surge actuator part #DM72VR can be used to replace the Atwood surge actuator you have currently. You most likely won't have to really change anything. There is probably a flexible brake line that attaches to the back of…

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Answer 2

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 3

The Demco Hydraulic Brake Actuator part #DM72VR is a great option to replace an Atwood 82543. That said, it does not come with any sort of reverse lockout feature therefore in order to reverse without the brakes locking up you will either need to add…

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Answer 4

To check for a Free Backing Hydraulic Trailer Brake #AKFBBRK-35 you will need to remove your brake drum assembly. The free backing brakes have a different front brake shoe. This shoe is designed to fall away when the trailer is moving in reverse. The…

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Answer 5

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 6

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 7

The #DM5939 is only compatible with the DA91 like the #DM8759131. Unfortunately, there is no option for manual lockout on a DA70 like the ##DM72VR. There are two ways you can keep your brakes from locking up with this brake actuator. The first is to…

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Answer 8

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 9

Hello Matt, thanks for reaching out. Atwood is no longer in business, so you are correct that no parts are available for the 61101 actuators. The Demco Hydraulic Brake Actuator #DM72VR can be used to replace it, but it is not necessarily a direct…

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Answer 10

I really wish we had replacement parts still for the Atwood couplers but since they've been out of business for so long we don't have any way to get the parts you are wanting.

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Answer 11

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 12

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

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