Today, were going to take a quick look at the Titan zinc plated brake actuator for disc trailer brakes, part number T4745700. Now this actuator runs a little bit higher of a pressure so it can operate disc trailer brakes. You want to make sure not to use it with drum brakes as it could damage the braking system. The couple is built out of steel and then zinc plated to help protect against corrosion.Its designed to work with trailer balls that measure 1-7/8, 2-inch, or 50-millimeters. It uses a hand-wheel latch system that tightens around the ball as you crank the hand wheel up top. As we turn the wheel clockwise, itll ratchet against the stop level and tighten against the ball below.
To loosen it, depress the lever and rotate the hand wheel counterclockwise. Again, itll work with a 1-7/8, 2-inch, or 50-millimeter ball. We have a 2-inch with us today and well show you how the latch works with an actual trailer ball. Fit the ball into place, then tighten the hand wheel by turning it clockwise and let the ratchet system do the rest. You can use this adjustment bolt below here to set off the wedge for 1-7/8 or 50-millimeter balls.Now hydraulic actuator works on momentum.
As you begin braking in the tow vehicle, the trailers momentum will push it forward onto the ball. This inner piece of the actuator will slide back and will compress the master cylinder system sending brake pressure out through the line that youll connect here. It will then apply that pressure to the brakes on the trailer and slow your trailer down. This coupler is designed to work with 3-inch wide trailer tongues. Take our inside measurement here and again we get 3 inches.
Its a bolt-on system, so there are a pair of boltholes on either side of the coupler that measure 3 inches apart center to center.It has a breakaway system where youll attach this cable to your tow vehicle and if the trailer were to ever separate the cable will pull taut and pull on this lever activating the brakes and slowing the trailer down.Up top is our fill cap here where well add brake fluid when we add the system. Youll want to make sure that you bleed the brakes on both sides of the trailer to make sure everything operates smoothly.The coupler has a gross trailer weight capacity of 6,000 pounds and a maximum tongue weight capacity of 600 pounds, and Titan covers it with a one-year warranty. Thats it for our quick look at the Titan zinc plated brake actuator for disc trailer brakes, part number T4745700. .
Today on This Old Boat Trailer we are going to rebuild the hydraulic actuator on here and we are going to be using part number 85841, the master cylinder itself, and then we are going to use a master cylinder replacement cap part number A87478, and the cable push rod replacement kit part number 85852, all from Atwood. The first thing we need to do is remove the old master cylinder itself. This is going to require taking off the cap which we have already done. We have disconnected the line back here already and then we can see our factory line, lets disconnect that and then we are just going to undo these four bolts right here. There is probably going to be some leftover brake fluid in there so it will be a good idea to wear some gloves or something. We are going to pull out the back and then underneath there is a little push rod you may want to pull away from it too to help knock it out. 01:09
Today on This Old Trailer we are going to install a brand new coupler using part number 2836AT from Master Lock. This is going to be a three inch wide coupler on it and in between here is going to be three inches wide and it is going to use a two inch ball. The first steps involved are to remove the old coupler. It has been on there for awhile. It is rusted so take a couple of wrenches to it and maybe we will get lucky and we will actually break the bolts and get it to come loose that way. This little stand right here got bent back, probably pinching the coupler, so we are going to take that one apart too. Obviously this is rusted in place so we are going to have to persuade it off. 00:59
Today we are going to show you how to replace a hydraulic coupler. In this case this one is damaged and is going to get replaced by a totally different model. First thing we are going to do is actually drain all the fluid from the master cylinder. And what we are actually going to do is open up one of the wheel cylinders and pump our fluid out and into a holding container. All right we will go to the wheel cylinder now and attach a rubber line to the bleeder valve and get our container ready. What we will do is take the cover off our bleeder valve here and we will go ahead and open it up. Okay, here we just take a rubber hose and just slide it on to the bleeder valve itself. All right and then we will just run the other half of the hose into an empty container here and start draining the fluid out of the master cylinder.