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Replacement Tube Cap for Bulldog Round Jacks with a Sidewind Handle

Replacement Tube Cap for Bulldog Round Jacks with a Sidewind Handle

Item # BD015500
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Accessories and Parts BD015500 - Hardware - Bulldog
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Replaces a lost or damaged cap for your Bulldog jack with sidewind handle. 1-833-496-1390 to order Bulldog accessories and parts part number BD015500 or order online at Free expert support on all Bulldog products. Guaranteed Lowest Price and Fastest Shipping for Replacement Tube Cap for Bulldog Round Jacks with a Sidewind Handle. Accessories and Parts reviews from real customers.
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  • Reviews (35)
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Bulldog Accessories and Parts - BD015500

  • Camper Jacks
  • Trailer Jack
  • Hardware
  • Caps
  • Bulldog

Replaces a lost or damaged cap for your Bulldog jack with sidewind handle.


  • Replaces a lost or damaged cap for your Bulldog jack with sidewind handle
  • Quantity: 1 replacement cap


500326 Replacement Tube Cap for Bulldog Round Jacks with a Sidewind Handle

015500 Bulldog Replacement Tube Cap for Round, Sidewind Jacks

California residents: click here

Video of Replacement Tube Cap for Bulldog Round Jacks with a Sidewind Handle

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Rebuilding Bulldog Sidewind Jacks

Today we're gonna be taking a look at the rebuild process for the Bulldog 2000 pound capacity round trailer jacks. What we're looking for is the side wind style. These are gonna be the 150 series jacks, and pretty simple process for re-building the jack. Depending on your needs, you'll need 3 different parts. We've got our replacement cap here. This is part number BD015500.

You may or may not need this if yours is undamaged, but it is important to keep dirt and debris from getting in the top of your jack. We've got our replacement handle and gear kit. This is gonna have just about everything that we're gonna need to rebuild the jack. You can see we've got our bevel gears here, we've got the flanged bushings that fit on the outside tube of the jack, we've got the pressure bushing there, the pins, and some washers. Also got our handle. This is gonna take care of the complete upper end of the jack.

Now once we get below this bottom gear, there's a bushing that is inside of the jack that's our friction reducer. It's a good idea once you get to that point, go ahead and switch out the bearing. The gear kit with the handle, everything over here, is gonna be BD500256. Then the bushing in addition BD500251. Let's get these moved over to the side.

We'll start taking this jack apart. For the flat blade screwdriver, we'll just want to remove the cap if it still is on your jack. Inside here you'll see it's pretty greasy. We're gonna go ahead and wipe out all of that that we can. Now we'll turn our jack to where you'll see that little half moon cut out that's in our gear. Our pin's gonna be right in behind there. We take a five 32nd punch.

We're gonna get that driven on through. Once we get it most of the way through, we're gonna have to angle our handle a little bit to get enough room to come completely out. We'll lift up on our handle once that's through. Easy to slide out. You can see that's gonna be a direct replacement of it. We've got five and three-quarters of an inch in total handle length here. That gives us good leverage. See once your handle comes out, your gear is just gonna drop down. Again, these gears are universal, so the bottom gear fits the side, the side gear fits the bottom. We don't want to forget the pin for our handle. You can see the pin that goes in the handle. That's gonna have the little grooves in it, whereas the pin for our base gear is going to be solid. It's not going to have any grooving in it. The base gear's just gonna slide off, and there's also a floating pin which goes through that middle section, which is this screw, so we can take that out. Right below it's that thicker black washer. This is gonna act as a support washer for our gear inside. Then we can just tap out the square portion there. That's that flanged bushing. It's gonna fit right over there in the square hole. That just gives our handle a much wider area to ride on so it's not riding on just the thin tube of the jack there. All right, now it's time to pull on the base, or we can just lift up on the outer tube, and inside we've got our bearing and our other support washer you see there. That's gonna fit right down on top of the screw, and our bearing fits on there. It's gonna offer us a very, very low-friction operation. You'll see the screw just threads down into that baseplate, so as we turn it, this expands, running the jack down. We go the other way, it's gonna bring our jack back up. This screw is very, very hard to damage, so if your jack isn't operating properly, it probably has to do with this bushing creating friction, or the gears not meshing together anymore. This is gonna be exactly how you'd go through the process of re-building it. We'll have our new bearing in place and the support washer that comes with it. Now we can bring our jack outer tube down on the inner tube here. Want to align that elongated dimple with the groove. Bring that all the way down, and then our screw's gonna come right back through this hole that's in the top of it. At this point, we're gonna put our washer back in place. This is that larger black support washer. We've got our base pin. It's gonna slide through. Now we want that to be about equal on both sides. You can see it's about equal and how much is hanging out on each side of our screw, and in your case you're gonna grab your new pieces as you put this back together. This is a brand new jack. We're just taking it apart so we can get a good look at it, so we're gonna reuse our old stuff. Get my gear, and we want to be sure that our pin sits in the enclosed slot, not the open slot. All right, and that should sit down so that the top of the gear is almost dead flush with the top of the screw. flanged bushing will go back in. Might offer a little resistance, but nothing too crazy. Then we'll take our other gear, and again, these are universal. It doesn't matter which one you use for which slot. Gonna place that in so that the gears line up. They're gonna mesh together. Then our handle's gonna come up through the bushing. It's gonna come through the gear, and right out the other side there. You'll see the hole in the handle. We want to rotate our gears so that that half moon opening lines up with the hole. Place the pin that has the little grooves in it right in between that bushing and the gear in that opening. Slide it in, and then we need to cap it in far enough so it's not gonna offer any interference. It should be just inset to the gear. Right back together. Now we want to use a good quality grease. It doesn't have to be a high-temp grease or anything like that, and we're gonna go in there and make sure we get this fully lubricated. You see, right back to brand new there. We'll have a great, smooth operation that's gonna make our trailer very easy to lift and lower with all of our new components in there and fresh grease. Now the replacement cap. You'll see it's got a little bit of a notch right there in the grooves. I like to line that up with the notch that's in the tube of the jack itself. That's just gonna tap on pretty quick and easy. That's gonna complete our rebuild of the Bulldog 150 series jacks. As you can see, with a few parts, and a few tools, you can really save yourself a lot of money as opposed to buying a brand new jack.

Customer Reviews

Replacement Tube Cap for Bulldog Round Jacks with a Sidewind Handle - BD015500

Average Customer Rating:  4.9 out of 5 stars   (35 Customer Reviews)

Replaces a lost or damaged cap for your Bulldog jack with sidewind handle.


Perfect fit.


fit my jacks thanks


Looks just like the part I lost!


Quick, convenient service & a perfect f it


Seems to be working just fine. I did have it pop off after my initial installation while pivoting the tongue jack around to the towing position.

Luckily I saw this happen and didn't lose the cap and was able to more securely fasten it, and have not had any issues ever since.

If this replacement piece is for a tongue jack that pivots like mine does, I would recommend pivoting this end of the jack rearward so you won't pick up any road debris from the tow vehicle which may break the plastic cap if it takes a direct hit from road debris at highway speed.

This is why I purchased a replacement in the first place.

Working out great for me!!
Andy H - 04/03/2018


fits great


The new Trailer jack was exactly what I needed to provide the space I needed to add a tool box. Love it!!!

Kenneth S - 07/27/2020


Thanks for the follow-up support. I was able to repair my jack yesterday
thanks to you folks. I usually don't do reviews but this project went so
well I thought I would for you since you took the time to set it up for me.
It was a great experience being able to buy the part at a decent price, then
have such great support to make the install go well.


I lost the cap off of my Bulldog jack and e trailer was the only place I could find one so I ordered 2, just in case.

Glad to get the correct part so I can quit using my homemade cap.


I needed a cap after my tailgate slammed down on mine and broke mine, and cracked my plastic tail gate trim..ordered that too.. But anyway this installed in seconds! I picked out the broken pieces and popped this in w the help of a small hammer easy and I had a strained shoulder when I did it, super fast. Shipping was VERY QUICK And COMMUNICATION was excellent!


The part I ordered was exactly what I needed. The shipping was fast and I would recommend etrailer to my friends.


The product is great and the shipping was fast . I have done business with this company before and I think they are the best .


Fits perfectly into my tongue jack tube (slightly larger than 2" ID).


Great customer service. Parts arrived soon after order.


Perfect fit!


Quick shipping.


Just what I ordered! Fit great. Very fast delivery! Three days .... Normal shipping. Fast.



Item shipped fast great customer service. Thank you


Product came fast and fit exactly as advertised.


item as described and very fast shipping


Thank you for the quick delivery, does what it needs to do!


Perfect fit.




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Info for this part was:

Employee Michael H
Expert Research:
Michael H
Employee Adam R
Expert Research:
Adam R
Employee Jacob T
Video Edited:
Jacob T
Employee Laura H
Updated by:
Laura H
Employee Wilson B
Updated by:
Wilson B
Employee Alexander C
Updated by:
Alexander C

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