Today were going to take a quick look at the Bulldog Collar Lock Coupler with high profile latch part number bd028461. This is a weld on style coupler thats designed to be welded directly to your trailer frame. Its a round tube coupler. It has an outer diameter of two and a quarter inches and an inner diameter of one and three quarter inches. It has an overall length of about 12 and three quarter inches. Now were going to show you how the mechanism works.
Included with the jack is a little keeper pin here that prevents the latch from being open. So well remove the pin and then we can open the latch. As we open the latch the linkage pulls this collar back which allows the hinge jaw on the ball head to open. To close it well close the jaw, close our latch and the collar slides back into place. Now weve got a two and five sixteenth ball with us so we can show you how it works with the ball.
Well pull our latch up and as we do the collar slides back and the jaws open. Fit the coupler over the ball, hold the jaw closed and the collar can come forward and slide onto the jaw. Now our ball is captive but it allows smooth travel to help the trailer track nicely behind the vehicle. Now you can also use, instead of the pin that comes with it, a coupler lock to secure this latch and make sure that the coupler doesnt come open when youre pulling down the road or also prevent theft when youre storing the trailer. Thats it for a quick look at the Bulldog Collar Lock Coupler with high profile latch part number bd028461..
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.