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:
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Today, we're going to take a look at the Titan replacement solenoid valve for Titan brake actuators with reverse lockouts. Part number is T4748800. Now, between our actuator and the line that provides fluid to our calipers, we're doing an electric lockout. Basically, this is going to be connected to ground on one side, we'll show you how to do that, and to your reverse wire coming from your seven-pole or five-pole, six-pole, whatever you've got. On the other side, it's going to act as a solenoid. As your vehicles backing up, it's going to cut off that pressure, or that brake fluid from locking up the brakes.
Basically, this is important when you're backing up a hill and you want to be able to have your trailer wheels turn freely. This prevents that pressure from being sent back. Otherwise, when you started to back up a Hill, as the actuator gets compressed, it's going to apply the brakes. It's going to make it difficult to back up.Now, the solenoid is designed to replace the thread adapter that we have here on the back of the actuators. We're going to use a half inch wrench, and we're going to get that removed.
Basically, the actuator is designed to work with or without an electric lockout. By taking this out, we'll be able to thread this in. That way it'll be set up for that lockout procedure when we hit reverse. We want to get that secured to our actuator. Going to use that big nut there.
It's a 15/16 inch wrench.Now, we'll take the flexible brake line hose. You'll have a shorter one from your kit. Remember, we've lengthened ours a little bit just to make up for the length of the tongue. We're going to get that secured down. Now, as you start it, also hold this one with a wrench, that way we don't have to worry about this turning on us.
For this, you want to use a 9/16 and then for this, we're going to stay with a 3/8. Now, for the wiring side, I'm going to extend one of the wires slightly. It really doesn't matter which one. I'm going to use a piece of 16 gauge wire. This is going to allow us to get it to the reverse signal on the plug coming from our truck. To connect the two together, I'm going to use a heat shrink butt connector. Part number is DW05744. If you don't have wire, that part number is 16-1-1. Get that crimped down.Now, we're going to use a heat source to get this shrank. You can use a heat gun, you can use a mini torch or just a lighter. The key is not to overheat it. Just want to give it some gentle heat. You can see it start to shrink down just like that. Now, once it's fully shrank, you notice the wire looks like it's much bigger, and then there's just a little clear gel that comes out of the end. Now, the other wire will act as our ground, so we're going to strip that back. I always like to twist the wires, give it something good to hold on to. Then we're going to place on a ring terminal. Going to crimp that down and we just have to attach this to the tongue, so when we hit reverse, the signal comes through here. The solenoid is going to close, not allowing the fluid to pass by. Then because we've got it grounded out, it's going to work for us.I'm going to place that right here, so it still will be accessible, but as we slide this back, most of that wiring will go inside there. We use a number 12 self-tapping screw to make that connection, just like that. Got our connections made. Now it's just slide the actuator back and get our bolts put in. With those through, we're going to place a couple of nylon lock nuts on the other side. It seems like the four-inch bolts really work out well and give us just enough bolt link there to get those nylon threads engaged, get everything nice and secure. Now, with half-inch bolts, you'll use a 3/4 inch or a 19 millimeter wrench and socket. They're the same size. Now, we'll get our bolts torqued down and that's going to complete our look at the replacement solenoid valve for the Titan brake actuators with the reverse lockout, part number T4748800.
Average Customer Rating: 4.6 out of 5 stars (195 Customer Reviews)
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.
This device was to big to fit on my actuator and trailer
Jenny N - 11/03/2022I changed over to disc brakes and needed the control valve it worked perfectly, install was easy did not need any adapters. One end is for the master cylinder the other for the brake line. Also liked the separate wire for grounding directly to the trailer frame.
Actuator was easy to screw on, splice the wires into harness and back in action! Seems like good quality part.
Excellent service from people who sell excellent products. etrailer is a wonderful company to do business with
Fast shipping. Part worked great, my trailer would lock up in reverse and this solved that problem.
This isn't necessarily a product review. It's a simple switch and it solved my problem. But I would rather comment about customer satisfaction.
Website was easy to navigate but more so than that was calling the the company. Calls were promptly answered, no question was to stupid and they emailed the answer about the product information in case you didn't make decision right at that point.
I have purchased a couple of items from e-trailer and have been very satisfied.
If you have a trailer, or any of the many other products they offer, I think you will be happy with choosing this company.
I don't usually write reviews, but this few minutes to comment doesn't compare to the time they spent with me to work out a small hiccup I had on my job.
Regards,
Charlie L.
Charles - 10/29/2018No issues what so ever with etrailer. On time, exactly what I ordered. A side note; I installed the reverse brake solenoid check valve myself. There were no instructions, but it should be pretty easy for someone with basic mechanical skills to install. Had to make up a special cover to prevent the extended brake line tube from getting bent when stepping across the trailer hitch.
Bleading the brakes can be a little tricky if a person hasn't done that before.
Len E - 08/08/2019Great. No more getting out and putting in the reverse lock out pin. You install it behind the master cylinder, hook it to the reverse lights and Wala, the brakes don't grab.
Products were great.
I have one suggestion to the shipping dept. at trailer:
DON'T put small items in the same craft paper that is used to fill voids in the shipping box. When I opened my box I pulled out the big bunch of craft paper and set it aside to pitch. I pulled out the bigger brake parts and then realized that i was missing two smaller items. At first I thought maybe they were back ordered. I checked the shipping paper and they were to be in this box. After going thru the craft paper I was going to pitch I found them inside. Close Call!!!
Put the small items in a small box or envelope.
Thanks.
jeffN - 10/23/2017Knowledgeable and helpful
David B - 05/16/2022This 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.
Happy with my order. Will continue to use etrailer!
Part purchased as part of an upgrade to disc brakes on a surge activated 4 wheel system. It works fairly well but there is definitely some resistance when reversing into my (slightly) uphill driveway.
I bought 2 of these and they did not last a year. not sure why , but after some time they close shut and disable your brakes on the trailer (with no power to it). I am assuming that the brake fluid destroy the moving parts inside, all though it is very funny as the solenoid should be "Fail Open", meaning that it should remain open when no electricity is applied or it breaks. I'm looking for some sort of a manual replacement that I can close only for backing up manually. Very disappointed.
So far so good. The customer service was excellent. They helped me through the process of product selection with ease and a sense of humor. Much better than the local shops here in Anchorage. I'm not mechanical in any sense so I found the online installation videos to extremely easy to follow. I ended up replacing all the brake lines, the master cylinder and the actuator. It was easy but I did it with help of the videos and a few phone calls to customer service who talked me off the ledge. The calipers will be replaced this year and I'm hoping for similar results. I'll keep you posted and thanks again. Great products, CS and online help.
I had to have the master cylinder on my boat trailer's surge brakes replaced and the service station's supplier said that he did not have the needed reverse lockout solenoid valve in stock and couldn't get one for the near future. I looked on the internet and found what was needed at etrailer. It was available and I ordered it. I received it in a few days and took it to the repair shop. The tech who installed it was pleased to get it quickly and also stated it was less than half what his supplier's price was.
So far so good. This is the 3rd solenoid valve I've had on the trailer in 3 years. I hope it lasts longer than the other 2.
Brian D - 08/15/2018I ordered the reverse valve and upgraded my trailer hitch so that when reversing up a grade i din't have to get out to insert a pin to keep the hitch from applying the breaks.
The part fit the master cylinder and the brake line fit the other end. There was no problems with the order and part was exactly what was described. great job by etrailer because i had tried to find this part before i had found etrailer. i recommend etrailer for all you trailer parts.
I have purchased items previously from E trailer and all have worked well.
This was the exception. It lasted less than 1 year. used trailer at the most 6 times.
The solenoid "clicks" as it should but doesn't stop the fluid. the brakes lock up when
backing. I called E trailer to check on the warranty. He informed me that it was for
only 30 days and asked me if I would like to purchase another. I declined. I'll have to
get a better one from somewhere else.
Disappointed.
Good addition to trailer brake master cylinder--insures you can back up without the brakes being applied.Simple installation--just wire into tow vehicle back up light wiring.
Works great but I feel like they should be included in the actuator because without it you can't go reverse they should make a whole week for the both or something in there to go to reverse without this solenoid your dad
Heather A - 04/02/2018Seems to be working great on the airboat trailer!
Product arrived as ordered, prompt service by this company.
Would buy from them again. They included installation instructions in an e-mail at time of order ---GREAT ADDITION to the order. This company cares about customers.
Doug D - 01/24/2018Fit perfectly and works great. Type of delivery method needs to be more clear. UPS w/USPS is different from UPS. We had to fight with the post office to get because we have no mail delivery at our house but we do get UPS FEDEX. The Post Office said they should be sending it back because we are not allowed to intercept mail. But we talked them into giving it to us, Thank heavens for the tracking number.
Chuck - 09/19/2015eTrailer delivered the correct part, on time and at a good price.
The solenoid valve itself has a small 1/8" NPT male thread with large 7/8"(?) wrench flats. Be careful tightening...
Also, the solenoid wires are both black. It doesn't matter which one is ground and which is powered. (It took me a few minutes to figure that out.)
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