How Does Breakaway Lever of Demco DA91 Actuator Reset

Question

Question:

how do you reset the break away brake on the Demco DA91

asked by: Branson J

0

Expert Reply:

I checked the manual for the Demco DA91 actuator part # DM8759131 and if the lever is pulled it can be disengaged by using a screwdriver to lift upward on the front of the flat emergency lever spring while pulling lever forward till it releases.

expert reply by: Jameson C

0

Kevin W.

6/17/2020

What damage occurs if trailer was pulled with brake engaged?

Chris R.

6/21/2020

It depends how long you pulled the trailer. You'll definitely want to give the brake assemblies a good visual inspection after the incident. Just look for any noticeable damage and go ahead and hook the trailer back up to test the braking like normal. Hopefully nothing happened to require any replacements or repairs.

Kevin

3/16/2025

What flat emergency lever. A diagram or a video would help.

Jameson C.

3/17/2025

@Kevin This is form the manual: SERVICING THE EMERGENCY LEVER (SEE PAGE 11 FOR BREAKDOWN AND REFERENCE NUMBERS) If emergency lever (#16) of actuator is applied, it can be disengaged by using a screwdriver to lift upward on front of flat emergency lever spring (#12) while pulling lever forward until released. But it's actually on page 8 at this link: https://cdn.demco-products.com/documents/BH20023_221114_154857.pdf If I could upload a picture in this comment I would and that would make it easier but we don't have ability to do so at this time.

Answer 1

If you still have the plunger end that goes in the break away switch, then you can simply insert the plunger back into the switch and that should cut off the power to the brakes on your trailer. If you no longer have the plunger, then you can either…

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Answer 2

To replace the breakaway cable on your Demco Hydraulic Brake Actuator #DM8759132 we have the following kits: - Replacement 3/32" Safety Cable #DM05408 - Replacement Break Away Cable and Lever #5401 The first kit is just the cable while the…

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Answer 3

Sounds like your trailer has an electric reverse lockout which prevents the brakes of your trailer from applying so that you can back the trailer up. If now the brakes won't release after the issue you had with someone else backing up the trailer…

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Answer 4

Hey Greg, I checked the manual for the Demco DA91 actuators like part #DM8759131 and if the lever is pulled it can be disengaged by using a screwdriver to lift upward on the front of the flat emergency lever spring while pulling lever forward till it…

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Answer 5

Hey Jacob, I have a replacement for you that could work but we unfortunately don't have an actuator that has a built in swing-away adapter. If you go with the Dexter DX7.5L A-60 Brake Actuator w Electric Lockout #DX56FR you can weld on a…

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Answer 6

The Mounting Holes of the Fulton FasLok Coupler #F343000301 are 1/2 inches in diameter. The center hole to inside top of the coupler is 3/4 of an inch. The two mounting holes on the side are 3 inches apart measured center to center. I have edited a…

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Answer 7

Hey Hugh, great question! The easiest way to tell if your surge brake is operating as it should is to hook the trailer up to your vehicle and back up. This will simulate the trailer coming to a stop and should lock the brakes up. The only exceptions…

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Answer 8

Since your trailer has disc brake it will be very important that you pick out a actuator/coupler that is rated for that and not drum brakes as that is a lower pressure rating that won't work well. The 85841 is no longer made so it would be tough…

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Answer 9

Are you referring to the breakaway or lockout on the Demco Hydraulic Brake Actuator part #DM8509612? If you are referring to the breakaway then there is a lever on the top of the coupler which has two positions, one for brakes on (red) and one for…

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Answer 10

I checked the manual for the Demco DA91 actuator part #DM8509612 and if the lever is pulled it can be disengaged by using a screwdriver to lift upward on the front of the flat emergency lever spring while pulling lever forward till it releases.

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Answer 11

If you have a partial application or full application of the breakaway cable, you will need to fully release the cable. I spoke with my contact at Atwood and he stated that you will need to seat the cable back into the actuator by feeding it through…

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Answer 12

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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How Does Breakaway Lever of Demco DA91 Actuator Reset

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