Today we're going to take a quick look at the Bulldog cast head coupler with wedge latch, part number BDA2565c0317. Now Bulldog covers this coupler with a limited five year warranty and it has a gross trailer capacity of 14,000 pounds. Included with the coupler, is the piece of channel that you weld directly to the frame of your trailer. It's got five different positions that you can adjust the head to better suit your truck and trailer combination. Each of these holes is spaced two inches apart center to center. There's a pair of bolts and nylon lock nuts that you'll use to secure the head to the channel.
Now the coupler head is designed to work with 2-5/16 trailer balls. It has a wedge latch system we can take a look at from underneath. There is a wedge here that fits behind the back of the ball. So, to open that wedge, we'll take that latch, pull the trigger release below the handle and lift up on the handle. There's holes through the handle across our top mount here where you can stick a coupler lock that will hold the latch open while you're hooking up or unhooking your trailer.
When closed, you can feed your coupler lock through the second set of holes here and it will help prevent either the trailer from accidentally coming unhooked or also protect against theft while you have your trailer in storage. Now we'll take a quick look underneath and we'll have our 2-5/16 ball so we can show you how it works with a ball. Again we lift up the trigger underneath the handle and open the handle and you can see the wedge move up and out of the way. We'll take our ball, fit it into the socket and the wedge closes on its own around the ball. We have nice smooth movement between the ball and the coupler, which will mean the trailer will track nicely behind the truck, but it's also completely captive and the ball's not going to pop out on its own.
With the mounting holes in place you have eight inches of adjustable height. And that's it for a quick look at the Bulldog cast head coupler with wedge latch, part number BDA2565c0317.
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.