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Accessories and Parts > Trailer Coupler > Replacement Parts > Brake Actuator Parts > Master Cylinder Parts > Solenoid > Titan


Replacement Solenoid Valve for Titan Brake Actuators with Reverse Lockouts

Titan Accessories and Parts

ratingratingratingratingrating (14 reviews)


Code:   T4748800

Price:$20.95


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Titan Accessories and Parts - T4748800

Backup valve installs in trailer brake actuators with high psi ratings and wires into your tow vehicle so that the trailer brakes do not activate when you shift your tow vehicle into reverse.

Features:

  • Installs in trailer brake actuator to prevent trailer brakes from locking when in reverse
  • Designed for use with Titan Model 6, Model 60, Aero 7500, and newer Model 10 and Model 20 actuators
    • For 2000 and older Model 10 actuators, an adapter (T4750200 - sold separately) may be necessary for installation
  • Also fits Dico Models 10, 20 and 60 actuators


4748800 Titan Solenoid Valve







Video of Replacement Solenoid Valve for Titan Brake Actuators with Reverse Lockouts


Videos are provided as a guide only. Refer to manufacturer
installation instructions and specs for complete information.

Video install titan replacement solenoid valve t4748800
Titan Replacement Solenoid Valve Installation
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Titan Leverlock Brake Actuator Installation

Video Transcript for Titan Replacement Solenoid Valve Installation

Today on our boat trailer were going to be installing the Titan brake actuator solenoid valve for reverse lockout, part number T4748800. Well first remove the nipple out of the back of the brake master cylinder of our actuator. Then we can go ahead and take the new solenoid, thread it directly into the back of the master cylinder. Now for this application well need to relocate the brake line so that we can run it directly into the back of the solenoid. To do this were going to go ahead and make a mark and then drill out a hole. Now weve got our pilot hole drilled out well use a step fit process to move up to a nine-sixteenths.

Now with our first hole drilled out well move back on the frame and drill out a second hole. Once we have it to our nine-sixteenths size we can then take the cutoff wheel and cut out the section between the two holes. Now that we have our cutout made, using a socket carefully bend the line to go into the actuator, being extremely careful not to crimp the line. Once we have the line bent we can go ahead and install it into the back of the actuator and tighten it down, being careful not to over tighten it because over tightening can cause the brass fitting to break. Now that the solenoid is secure well go ahead and install the brake line.

Now with all our components installed well need to bleed the air out of the braking system. To do this well open up the bleeder on the brake caliper and remove the cap from the master cylinder, and well also make sure we have a full master cylinder. After a bit of time the air will self-bleed out of the bleeder, assisting in getting the air out of our system. After you gravity bleed it its recommended to do a vacuum assist, or manual power bleed. Once weve bled all the air out of the system were ready to hit the road.

For additional protection of our solenoid well add the Titan Solenoid shield. To install this shield well remove the four fasteners here at the back of our actuator, two on the side and two in the top. These will line up with the shield. Well first line the top hole fasteners up and install them finger tight. Then well flex the shield down until the side fasteners line up with the predrilled holes in our actuator.

Once they line up well go ahead and reinstall the side fasteners and secure them. Then we can go back to the top fasteners and secure them.That does it for the install of the Titan brake actuator solenoid valve for reverse lockout, part number T4748800 on our boat trailer. .


Customer Reviews

Replacement Solenoid Valve for Titan Brake Actuators with Reverse Lockouts - T4748800

Average Customer Rating:  ratingratingratingratingrating4.8 out of 5 stars   (14 Customer Reviews)




- T4748800

ratingratingratingratingrating by: Randy M.04/07/2014

Is this review helpful?


Simple and straight forward. Not often do you get a PO acknowledge and ASN for such a small order as a random customer. Would buy again from etrailer.com based on experience. Only wish - Have freight collect on account as an option for UPS and/or FedEx services. 123988



- T4748800

ratingratingratingratingrating by: D Hunt05/04/2011

Is this review helpful?


This review is not intended to persuade you to buy or not buy this solenoid. If you need one, you have to have it. But I will caution you based on my experience to be careful with it. The device has 1" wrench flats to secure it, but only an 1/8" pipe threaded nipple that is unreinforced, soft brass going into the master cylinder. My coupler has guide pins out the rear that prevent a 1" wrench from fitting around the solenoid properly. So I tried to tighten the thing at an angle and of course accomplished little other than to prove how fragile the thing is and break it right off. I'm not impressed with the design, but that's how they made it. My solution is to extend a short pipe out of the master cylinder to clear the pins and be much more careful assembling it next time. It isn't for heavy hands.12856



- T4748800

ratingratingratingratingrating by: Matt W.04/21/2014

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fast delivery and exactly as ordered 126330



- T4748800

ratingratingratingratingrating by: Wayne03/25/2014

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Great service nice price thanks 122171



- T4748800

ratingratingratingratingrating by: Burizoon02/07/2014

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Works as expected. Installed on car hauler with Hydraulic Disc Brakes. No problems. quick shipping.116010



- T4748800

ratingratingratingratingrating by: Mark S.09/17/2013

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Worked like a champ, and was delivered on the third day after ordering. High quality product and prompt service.100287



- T4748800

ratingratingratingratingrating by: Doug M08/12/2013

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Would recommend to a friend. 94607



- T4748800

ratingratingratingratingrating by: Don B08/09/2013

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Works fantastic. My wife loves it - she can now back the trailer up without having to manually lock the surge brake every time... The old one never worked.Thank you!94171



- T4748800

ratingratingratingratingrating by: Randy E.05/18/2013

Is this review helpful?


Works perfectly, If you have a trailer with surge/disk brakes this is a must. Easy to install. The optional shield (Part # T4835800183) Gives much needed & added protection.80840



- T4748800

ratingratingratingratingrating by: Ian03/03/2013

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Great product exactly as described and reasonably priced68514



- T4748800

ratingratingratingratingrating by: J10/14/2012

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VERY NICE! 57172



- T4748800

ratingratingratingratingrating by: Elliot L07/07/2011

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Fast reliable service. Even with a holiday weekend. 18820



- T4748800

ratingratingratingratingrating by: Mike K06/02/2011

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Excellent customer service and fast shipping. Will use again for future trailer needs.15958



- T4748800

ratingratingratingratingrating by: Jeff A09/16/2011

Is this review helpful?


The service was amazingly fast and accurate. The item I ordered was exactly what I needed. Thanks!24056



Ask the Experts about this Titan Accessories and Parts
Expert Answers about Replacement Solenoid Valve for Titan Brake Actuators with Reverse Lockouts - T4748800                                          Do you have a question about this Accessories and Parts?


  • What Size Threads does the Replacement Solenoid Valve # T478800 Have
  • I spoke with my contact at Titan and he said that the Replacement Solenoid Valve, part # T4748800, should thread right into the back of your Titan Model 10 disc brake actuator. He thought that maybe you forgot to remove the orifice from the back of the Model 10 actuator before you tried to install the # T4748800. Once that is removed the solenoid valve should thread right in. He said that the thread on the solenoid valve is 1/8-27 fine pipe threads.
    view full answer...

  • How To Stop Brakes On Trailer From Locking When In Reverse Using Titan Model 10 Brake Actuator
  • What you will need to do is install the Replacement Solenoid Valve, part # T4748800. The Titan Replacement Solenoid Valve # T4748800 will stop the brakes from activating when you are in reverse. You may also be interested in the Titan Solenoid Shield, part # T4835800183, which will protect the solenoid valve from being stepped on if you do not already have a cover.
    view full answer...

  • Will the Titan Reverse Solenoid Valve # T4748800 Thread Into Titan Master Cylinder # T4747100
  • The Titan Solenoid Valve for Reverse Lockout, part # T4748800 has 1/8 inch NPT male threads on the inlet connection. This will thread into the Titan Master Cylinder for Titan Actuators - Disc Brakes, part # T4747100. Both of these parts are designed for disc brake applications.
    view full answer...

  • Can Replacement Solenoid Valve, # T4748800 be Used on a Titan Model 60 Trailer Brake Actuator
  • Yes, the Replacement Solenoid Valve, # T4748800, will fit the Model 60 Titan Actuator # T4332900. We have learned that in order to attach this solenoid to the master cylinder, the fitting that is currently on the master cylinder will need to be removed and the solenoid threaded directly on in its place. You will also probably want to keep the solenoid covered. Actuators that come with the electric lock out already have a cover in place. But, you can add it on with part # T4835800183.
    view full answer...

  • What is the Function of the Replacement Solenoid Valve # T4748800
  • The function of this Replacement Solenoid Valve # T4748800 is to stop the hydraulic pressure from activating your trailer brakes when you put your tow vehicle in reverse allowing you to reverse your trailer. This is accomplished by wiring this unit into the reverse light circuit so that when your vehicle is put in reverse the solenoid activates and prevents pressure from passing through the lines activating the brakes. If you are looking to control the flow of the pressure to allow you to
    view full answer...

  • What are the Thread Sizes on the Titan Replacement Solenoid Valve
  • I spoke with my contact at Titan and he informed me that this Replacement Solenoid Valve # T4748800 could be used in the brake line instead of on the back of the master cylinder like it typically installs. He said as long as you securely install it on the brake line it would function properly. This is the correct unit for the model 20 actuators. He also said that the male side of this product has 1/8 inch pipe threads, and the female side has 3/8-24 inverted seat threads that 3/16 inch size b
    view full answer...

  • How Do you Wire In a Replacement Solenoid Valve
  • This Replacement Solenoid Valve for Titan Brake Actuators # T4748800 that you referenced will wire into the reverse light circuit of your tow vehicle so that when you put your vehicle in reverse the brakes of your trailer will not be applied. You would want to run a wire from the center pole on your 7-way to one of the wires of this solenoid, and then ground the other and it should work well for you. The center pole of your 7-way is the reverse light circuit and this would be the correct pole
    view full answer...

  • Where Should the Ground be for the Replacement Reverse Lockout Solenoid Valve, # T4748800
  • On the Replacement Solenoid Valve, # T4748800, the best place to ground the unit is to the trailer frame at a place that is free of dirt and corrosion and where there is no paint. It is possible that you can ground it with the main trailer connector ground. The other wire attaches to the trailer connector reverse light circuit and will be activated when the vehicle is placed in reverse.
    view full answer...

  • Normally Open Reverse Lockout Solenoid for Disc Trailer Brakes
  • The normally open style like # T4748800, will only prevent fluid from going back to trailer brakes when you put the vehicle in reverse. Once the vehicle is in reverse, the normally open solenoid will close and allow you to back up without the brakes engaging. On a normally open system, you will need to be careful when backing up because if you hit a curb or another object it could add even more pressure to the master cylinder and could possibly damage it. A normally closed system does have
    view full answer...

  • Can a Reverse Lockout Solenoid Be Added to an Actuator That Does Not Have a Lockout Solenoid
  • Yes, you can add a solenoid valve to your brake actuator on your trailer to prevent the brakes from locking up when in reverse as long as you have the standard 3/16 inch brake lines on your trailer. This valve will attach between the master cylinder and your brake line and it will wire into the reverse light circuit on your trailer. Once your vehicle is put in reverse the solenoid valve closes and prevents pressure from reaching the brakes. Make sure that when you are backing up that you
    view full answer...

  • Can the Electric Reverse Lockout Solenoid be Used on a Titan Model 60 Trailer Brake Actuator
  • It sounds like your model 60 actuator is for drum brakes and it has the check valve inside the master cylinder. You can use the electric reverse lock out solenoid # T4748800 with the model 60. It will attach directly to the master cylinder and the brake line will attach to the other end. When the vehicle is in reverse, it will not allow fluid to go back to the brakes. The electrical connection needs to be made to the vehicle reverse light circuit. You will also want to protect the solenoid by
    view full answer...

  • How to Wire an Electric Reverse Lockout on a Trailer to Work with a Vehicle that has a 4-Way Flat
  • Since you have a 4-Way flat trailer connector, you will need to add a 5-Way flat adapter, # 20036, to the vehicle and a 5-Way flat, # HM47910, on the trailer if you want the electric reverse lockout to work. On the vehicle side, the extra wire will connect to a reverse light wire. On the trailer side, the extra wire will attach to one of the wires on the solenoid. The other solenoid wire will need to be grounded to the trailer frame. I have included a link to a video showing a typical inst
    view full answer...

  • Brakes Lock Up After Installing Reverse Lockout Solenoid Valve # T4748800
  • I would recommend bleeding your brakes after installing a new Solenoid Valve, # T4748800. The main brake line must be disconnected from the actuator to install this item and anytime the brake lines are disconnected, there is a chance for air or some type of debris to enter the brake lines. The electric lockout solenoid should not cause your brakes to lock up after you come to a complete stop. The solenoid has two wires, one should be connected to the reverse light circuit coming from the tow
    view full answer...

  • When Installing a New Titan Solinoid # T4748800 Do the Brakes Need to Be Bled After the Installation
  • According to my contact at Titan, you will want to bleed the brakes after you install your Titan Replacement Solenoid # T4748800. He said, ideally, you want to bleed your brakes each time you work with anything that can effect the brakes. Although, when replacing a solenoid the possibility of losing fluid is low, you also have the opportunity to gain air in your brakes which is not a good result, therefore, he highly recommends bleeding the brakes after you install the solenoid.
    view full answer...

  • Hydraulic Trailer Coupler is Locking Trailer Brakes When Trailer is in Reverse
  • Without any background information, it will be hard to say what you have going on. Have you recently replaced the coupler or master cylinder? Did the brakes previously function correctly, but are recently locking up when the vehicle is placed in reverse? Given the information available, my best guess is that either your reverse lock-out solenoid is faulty, one of its wires has become disconnected, or the signal from the reverse light circuit on the vehicle is not reaching the solenoid for
    view full answer...

  • Is a Flexible Hose Needed to Connect Titan Reverse Lockout Solenoid Valve # T4748800
  • You will need to add a flexible brake line hose only if your trailer coupler uses a hinge at the rear of the coupler (if it is a foldaway type). If so, we offer flexible brake line hoses in three lengths, each with male and female 3/8-inch-24 UNF fittings. The 13-inch hose is part # T0777300; the 18-inch hose is part # 18018-SF; and the 25-inch hose is part # T0980100.
    view full answer...

  • Is a Reverse Electric Lockout Needed on a Boat Trailer with Titan Model 60 Actuator
  • The issue is that with the way a surge coupler works when backing up, normally up hill, the trailer is pushing the other way which will cause the actuator to compress in sending fluid back to engage the brakes. This makes it very difficult or impossible sometimes to back the trailer up. There are 2 kinds of lock outs to prevent this, a manual which is built into an actuator and prevents the coupler from pushing in, and there is the electric type. It will energize when the vehicle is placed in
    view full answer...

  • Will the Replacement Reverse Lockout Solenoid # T4748800 fit Titan Model 20 Actuators
  • Yes you can, the Replacement Solenoid Valve for Titan Brake Actuators with Reverse Lockouts # T4748800 that you referenced has been confirmed to fit Titan Model 20 actuators so it should work well for you. I attached an install video for this product for you to check out also.
    view full answer...


Info for this part was:


Photos by:
Theodore B

Expert Research:
Michael L

Video Edited:
Zack K

Expert Research:
Robert G

Expert Research:
Michael H

Expert Research:
Reno H

Expert Research:
Jameson C

Expert Research:
John H

Updated by:
Adele M

Expert Research:
Adam R

Photos by:
Jim W

Expert Research:
Lori W

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