My Brakes Are Activating When I Reverse Uphill What Can I Do?

Question

Question:

Hello. I have a Karavan boat trailer with drum brakes to transport a 15 Boston Whaler. When reversing up a slight incline the trailer brakes lock up. What can I do to prevent this from happening? Thank you.

asked by: Glenn S

1

Helpful Expert Reply:

This likely means your hydraulic brake actuator does not have a reverse lockout. Reversing the trailer up an incline compresses the actuator and activates the brakes. Adding a lockout allows you to backup without actuating the brakes. We have the reverse lockout solenoid # DM11993 that can be added to your actuator. This will be wired to your reverse light circuit and will lock out the actuator when you are in reverse.

We also offer actuators like the # T63FR which can be locked out manually.

expert reply by: Jesse M

1

Answer 1

Demco surge brake actuators require a Reverse Lockout Solenoid #DM11993. They do not have the ability to use a reverse lockout key.

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Answer 2

The DA91 Demco surge brake actuator that you are looking for is part #DM8750311. This has a 2-5/16" coupler, comes with an electric lockout, is designed for disc brakes, and has a weight capacity of 8,000 lbs towing and 800 lbs tongue…

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Answer 3

You could get the Demco lockout solenoid #DM5404 to fit the UFP coupler. But as far as whether or not it is the right type of solenoid is what you need to look at. This one is designed to route brake fluid back into the master cylinder via a second…

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Answer 4

Surge brakes will activate when backing the trailer up unless you do one of two things to address the problem. You can install free-backing brake assemblies on the trailer (I attached a link to a page that has all of the ones we carry) or you can use…

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Answer 5

Yes, to add an electric lockout to your 12.5K Demco Hydraulic Brake Actuator #DM8101038 you just need the following: - Reverse Lockout Solenoid #DM11993

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Answer 6

We have just what you are looking for. For a surge actuator designed for drum brakes by Demco we have the part #DM72VR which has a 7,000 lb capacity. Then to add an electric reverse lock out all you'd need then too is the part #DM11993 and…

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Answer 7

Yes, the Demco reverse lockout solenoid part #DM11993 is compatible with the DA70 Demco couplers.

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Answer 8

We do have a replacement reverse lockout solenoid for the Demco Hydraulic Brake Actuator #DM8509612, but the Replacement Solenoid Valve #T4748800 that you referenced is not designed and has not been tested to fit the Demco actuators. Instead you will…

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Answer 9

If you wanted to install an electric reverse lockout on the DA10 Demco actuator part #DM8102222 you would want the part #DM11993. This is confirmed to fit DA10 actuators like this. When this solenoid has power on it would prevent hydraulic pressure…

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Answer 10

The Reverse Lockout Solenoid for Demco Hydraulic Brake Actuators #DM11993 is the correct solenoid for your Demco Hydraulic Brake Actuator #DM8609101. The solenoid will fit Demco models DA10, DA20, and DA91. This solenoid has a non-bypass…

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Answer 11

For your Adapter 4-Pole to 5-Pole Trailer Wiring Adapter - Shorter #47515 you will connect the blue wire to your reverse light power at the tail light. Use a circuit tester like #PTW2993 to find the power wire that only comes on when the vehicle is…

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Answer 12

The Demco Actuator part #DM8608601 that you referenced does not come with a reverse lockout but you can add one with the #DM11993. When this is wired up and activated it basically prevents the brakes of your trailer from activating so that you can…

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