Today were going to take a quick look at the Bulldog collar lock Coupler with low profile latch part number bd028287. This coupler is designed for two inch trailer balls as well as the standard 50 degree A-frame trailers. Its got the industry standard cut outs for mounting a jack and a large hole in the center for the body of the jack and three slotted holes for your bolt on hardware. This is a weld on coupler so when you attach it to your trailer youll just weld along the edges to secure the coupler. Were also going to go over one quick measurement and thats the overall length of the coupler and we get about 16 inches. Now were going to show you how the coupler mechanism works.
Theres a low profile latch here that pulls back our collar which then releases our spring loaded hinge jaw up front. Theres a safety pin through the body of the coupler that prevents the collar from sliding far back enough to disengage. So first well remove this pin so we can operate our coupler. The pin is secured to the collar with a chain lanyard that way you dont lose the pin. Now well grab our latch, pull back our collar and the hinge jaw pops open.
To secure it well hold our latch, pull the collar back just a bit then we can close our jaw and let the collar slide over it. Weve got a two inch trailer ball so we can show you exactly how it works on the ball. Well push our latch to open our collar. The jaw pops open and the ball can now be fitted into the socket. Well open our collar back, close the jaw and let the collar slide over it.
Now our ball provides enough travel that the trailer will tack smoothly behind the vehicle but its completely captive and cant come out. Thats it for a quick look at the Bulldog collar lock Coupler with low profile latch part number bd028287.
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.