Today were going to take a quick look at Master Locks Trailer Coupler part number 2834at. This trailer coupler is a bolt on design. Theres a pair of bolt holes on either side of the coupler. That way you can bolt it directly to your trailers tongue. Its designed to work with two and half inch channel tongue couplers. The inside width here measures two and half inches.
So you want to make sure to check your trailer tongue and found out if its compatible. It has a 2,000 pound gross trailer weight capacity and a 200 pound tongue weight capacity. Its zinc plated to help prevent against corrosion and its designed to work with one and seven eighths inch trailer balls. Now were going to go over the latch mechanism and show you how it works. Its got a trigger latch here on the bottom that youll pull up in order to open the latch all the way up.
When you close it this trigger latch will re-engage so that the latch cant come open unless you pull this release. You can also see here that theres a hole where you can fit in a coupler lock or a pin to keep the latch from opening either when youre trailering down the road or when you have your trailer in storage. Now well flip the coupler over so you can see how the mechanism works inside. The ball will sit here and this wedge latches up behind it. Well go ahead and release it and the wedge opens up so you can get the ball in or out.
You can use this nylon lock nut here to adjust it to make sure it fits your ball nice and snug. Weve got a one and seven eighths inch trailer ball so we can show you how it works. With the latch closed we cant fit the ball in. We release the latch. We can drop the coupler over the ball.
Well close the latch and the wedge tightens up behind the ball securing it. Well show you that from the underside too. Weve got our ball in place. Well release the latch and the wedge moves open to allow the ball free. Put the ball back in place and lock it down. Thats it for a quick look at the Master Lock Trailer Coupler part number 2834at.
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.