Replacement Master Cylinder w/ Bypass Electric Lockout for Demco Actuators - Disc Brakes
(12 reviews)
Price: $172.83
In Stock
Replacement Master Cylinder w/ Bypass Electric Lockout for Demco Actuators - Disc Brakes
Item # DM5918
Our Price: $172.83
This item qualifies for Free Shipping
In Stock
- All Info
- Reviews (12)
- Q & A (3)
- Videos (1)
- Photos
- Why etrailer?
Demco Accessories and Parts - DM5918
- Brake Actuator
- Master Cylinder Parts
- Master Cylinder
- Demco
- Disc Brakes
Master cylinder with bypass installs in your Demco actuator and wires into your tow vehicle so that your trailer brakes won't activate when you shift your vehicle into reverse. For use with Demco hydraulic surge-type disc brake actuators.
Features:
- Replacement master cylinder is designed for use with Demco trailer brake actuators with electric reverse lockouts
- Works with DA66B, DA86, DA91, DA10, DA16, and DA20 models
- Electric reverse lockout lets you back up without actuating trailer brakes
- Solenoid activates automatically when you shift into reverse
- Bypass configuration
- Made in the USA
Specs:
- Bolt hole pattern: 2" wide x 3" long
- Overall dimensions: 2-3/4" wide x 5" long
5918 Demco Replacement Master Cylinder with Bypass Solenoid - Disc Brakes
California residents: click here
Video of Replacement Master Cylinder w/ Bypass Electric Lockout for Demco Actuators - Disc Brakes
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Video Transcript for Review of Demco Brake Actuator - Replacement Master Cylinder - DM5918
Jeff: Hello everybody, this is Jeff at etrailer.com. Today we're going to take a look at the replacement disc brake master cylinder with the bypass electric lockout for Demco actuators. Now this replacement master cylinder is designed for use with the Demco trailer brake actuators that have the electric reverse lockout. It is designed to work with the Demco brake actuator model DA66D, DA86, the DA91, the DA10, the DA16, and the DA20 models. This is an electric reverse lockout, it'll let you back up without activating your trailer brakes.The solenoid right here will activate automatically when you shift into reverse. You can see the two wires, there's two black wires here, one will connect to a good clean ground, the other connects to the reverse light circuit and the wires are both black wires so either wire will connect to either function.
This does have the bypass configuration. Now the measurement up at the top, the bolt holes here, they measure center to center, three inches by two inches, and the overall dimensions at the top, it's going to be right at four and a half inches by three and a quarter inches.But that should do it for the review on this replacement disc brake master cylinder with the bypass electric lockout for Demco actuators.
Customer Reviews
Replacement Master Cylinder w/ Bypass Electric Lockout for Demco Actuators - Disc Brakes - DM5918
Average Customer Rating: 4.3 out of 5 stars (12 Customer Reviews)
Master cylinder with bypass installs in your Demco actuator and wires into your tow vehicle so that your trailer brakes won't activate when you shift your vehicle into reverse. For use with Demco hydraulic surge-type disc brake actuators.
- DM5918
by: 71roadrunner12/20/2019
The initial product had a problem with the solenoid after about 6 months after installation. The solenoid did not respond to the 12V reverse signal. Although customer service could not replace the total unit, they were able to have the vendor send a replacement solenoid at their expense. The solenoid showed up later than promised, however, it did respond to the 12V signal. The unit now works. I now see that the solenoid can now be purchased individually. Thanks for the opportunity to share this review and I appreciate customer service helping to resolve this issue.
- DM5918
by: Dustin04/27/2020
In less than one year the reverse solenoid went out. I saw in another review this same issue happened. My solenoid was wired directly to the vehicle ground supply and is getting 14.3 volts.
- DM5918
by: Pete10/02/2019
Your company did what it said it would, in a very timely time..The lights were as I needed, would buy from you again.. The brake cylinder also fits my trailer and the price was right.
- DM5918
Mike L - 11/07/2018
![Installation Instructions]()
Helpful Link
by: Tim11/06/2018
the solenoid failed I need to replace a gain.
Comments
I spoke with my contact in the Tech Support department at Demco, who tells me its pretty rare for those solenoids to fail after only one year. What is much more likely is that the solenoid is not getting sufficient power, or the ground connection isnt secure enough. Instead of grounding the solenoid to the trailer frame, tie it into the ground for the trailer connector which will ensure a good ground connection. Youll also want to check the solenoid power feed and make sure youre getting a full 12-volts. If its not a wiring issue and the solenoid needs replacing, we carry a replacement as part # DM5404
Demco Solenoid Kit for Brake Actuators with Reverse Lockouts - Bypass
$54.35.
-- Demco Solenoid Kit for Brake Actuators with Reverse Lockouts - Bypass
$54.35.
Mike L - 11/07/2018
Helpful Link
- DM5918
JohnK - 03/11/2018
by: JohnK03/10/2017
Excellent Product and price,fit perfect,thanks for your speedy service.
Comments
Product worked just find!
JohnK - 03/11/2018
- DM5918
by: Derek07/19/2018
Needed a new master cylinder for my boat trailer. They had it in stock and shipping was fast. Will definitely use ETRALIER in the future.
- DM5918
by: Anthony03/08/2018
This product will help when backing up the trailer. Replaced original perfectly.
- DM5918
by: Gregory05/19/2020
Looks like a quality part Fit exactly where the old one came out
- DM5918
by: Brian02/20/2019
Master cylinder fit perfectly. Great customer service. Thanks.
- DM5918
by: Chris06/20/2019
Still working great after 1 year !
- DM5918
by: John Lozano09/17/2016
Part fit perfect!!!!!
- DM5918
by: Robert06/08/2021
12
12
Ask the Experts about this Demco Accessories and Parts
- 05680-C Master Cylinder Replacement for Trailer RecommendationThe correct replacement master cylinder kit we have for your Demco setup is the part # DM5918 which comes with the lock out replacement.
view full answer...![Image 1 for]()
- Converting Boat Trailer with Demco Actuator from Drum to Disc BrakesFirst, for the actuator that you have purchased, # 8605001, you can replace the drum master cylinder with Replacement Master Cylinder w/ Bypass Electric Lockout for Demco Actuators - Disc Brakes Item # DM5918. It will fit in place of the master cylinder you have and it comes with an electric reverse lockout. For disc brakes I recommend replacing not only the brakes but the lines as well. If there is crud in the master cylinder then it is probably in the lines so replacing the lines...
view full answer... - Parts Needed to Allow Demco 8605001 to Work With Disc BrakesGood news! For your # 8605001, you can replace the drum master cylinder with Replacement Master Cylinder w/ Bypass Electric Lockout for Demco Actuators - Disc Brakes Item # DM5918. It will fit in place of the master cylinder you have and it comes with an electric reverse lockout. You will also need to add the Replacement Solenoid Cover for Demco Hydraulic Brake Actuator - Model DA66B - Qty 1 # DM12267-95 to protect the solenoid after installing it on this particular actuator, but that's...
view full answer...
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Info for this part was:
Written by:
Lindsey S
Installed by:
Jeff D
Expert Research:
Jameson C
Updated by:
Laura H
Updated by:
Wilson B
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