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Replacement Thrust Bearing Kit for Bulldog Trailer Jacks - 7,000-lb to 8,000-lb Capacity

Replacement Thrust Bearing Kit for Bulldog Trailer Jacks - 7,000-lb to 8,000-lb Capacity

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Replaces the bearing, nut, and washer for your Bulldog trailer jacks with 7,000-lb to 8,000-lb static capacity. 1-800-940-8924 to order Bulldog accessories and parts part number BD500224 or order online at Free expert support on all Bulldog products. Great prices and Fastest Shipping for Replacement Thrust Bearing Kit for Bulldog Trailer Jacks - 7,000-lb to 8,000-lb Capacity. Accessories and Parts reviews from real customers.
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Bulldog Accessories and Parts

  • Camper Jacks
  • Trailer Jack
  • Hardware
  • Bearings
  • Thrust Bearings
  • Bulldog

Replaces the bearing, nut, and washer for your Bulldog trailer jacks with 7,000-lb to 8,000-lb static capacity.


  • Replaces the bearing, nut, and washer for your Bulldog trailer jacks with 7,000-lb to 8,000-lb static capacity
    • Also fits Crown jacks with 7,000-lb capacity
  • Includes: 1 bearing, 1 nut, and 1 washer


  • Bearing dimensions:
    • Inner diameter: 0.63"
    • Outer diameter: 1.42"


  • Bulldog trailer jacks with 7,000-lb to 8,000-lb static weight capacity: BD198100, BD198150, BD198200, BD198250, BD190705, BD190706, BD190708, BD190754, BD190756, and BD190758
  • Crown jacks with 7,000-lb capacity

500224 Replacement Thrust Bearing Kit for Bulldog Trailer Jacks - 7,000-lb to 8,000-lb Capacity

Item # BD500224

California residents: click here

Video of Replacement Thrust Bearing Kit for Bulldog Trailer Jacks - 7,000-lb to 8,000-lb Capacity

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

Video Transcript for Bulldog Jacks Replacement Sidewind Gear Kit Review

Today we're going to be taking a look at the rebuild process on the Bulldog 190 Series Square Jack, and the Fulton 5000-pound lift capacity Square Jack. This has an 8000-pound static capacity just like the Bulldog jack does here. These are going to have the 2 inch outer tubes, of course, square. The 2 inch inner tube on both of them there, and the metal cap is going to look like that. It has two bolts that hold it in place. Now, to rebuild our jack we're going to have a few components here.

First, we'll start off with part number BD500156. This is going to be our gear kit. Now, this is kind of a universal gear kit for a lot of the Fulton and Bulldog jacks. Its going to come with two base gears. We'll be using the one with the larger diameter hole in it, and I have a new pin for that to ride on.

Got a new shear pin here for our handle gear. Its what turns that base gear, rotates it, and that what runs our screw up and down, and makes our jack work. We also have a metal bearing. Now, this is kind of an enclosed bearing. You see its got a cap on the top thats going to help keep out any moisture that comes down, and then the bottom, thats going to rotate on our thrust washer there, or on the thrust bearing. That eliminates any of the friction, and its going to help our jack last for a good long time.

Now, the bushing with the larger diameter opening you see here is going to go around the screw in a downward fashion. The bearing kit, that is part number BD500224. You want to get the handle kit, which is part number BD500171. Thats going to have the handle, a new shear pin, and then the flange bushings for either side there. Then if your caps been damaged this is a pretty integral part of the jack. This is whats going to keep the moisture and the dirt out of our gear kit.

Its going to keep it from running down into the inner tube of the jack. This is going to be part number BD500205. Now, the toolkit youre going to need is pretty simple here. Weve got a ratchet. This has an 11-mm socket on it. We also have a hammer. We got a 1/8 inch, and a 5/32 punch, and also a pair of needle nose. It's really all we're going to need to get this done with the exceptions of a little bit of grease. It doesnt have to necessarily be high temp or high load grease, but you do want a quality grease, and some shop towels. Now, the two bolts that pass through the cap, you can see theyve got lock nuts on the end of them there. You can see that ones not even really tightened down. You want to tighten it down at least till it makes contact. We're going to loosen these up. Get those bolts removed. Then our cap should just lift straight off of there. If we rotate it well see our gears there. Got our handle gear there, and you can see its just going to turn that base gear that turns the screw, which causes it to go up and down. Now, lets wipe that grease out of there so we can see where our pins are located. If we rotate our handle, you can see right here theres a little indention in that gear. Thats where that shear pin passes through. What well do is take our hammer. We're going to start to drive that out. Lets bring that out. Well set that aside. Then we can just gently pull back on that handle and it will slide right out of our gear, and thats the hole our shear pin went through, so thats what ties the handle and the gear together. Lift our gear up. Then with the handle kit, these are those replacement bushings. Now, for the base gear all we have to do there is just lift up. You can see thats going to come right off the pin. Then again we've got that larger diameter hole in the gear, so well be using that one. Now, we're going to, of course, just clean these parts up and put them back in. These dont need to be rebuilt. You get the idea of where the replacement parts will come into play. You can probably slide it out by hand, but just grab that pin with needle nose you can pull it right out of there. Next, we got a couple of washers here. You can see that other bushing. Now, well just lift up on that outer tube. Youll see its going to slide right off of our inner tube. We can see that bearing, and that thrust washer. Basically, this washer rides on the outer tube. It sits right here, so as the screw turns, as it goes lower that allows the outer tube to lower down on, and then as it extends, or as it pushes up that bearings just going to spin allowing the rotation, and reducing the friction between that top plate, so really hard to damage the screw portion of the jack. Most of your damage is going to occur if your handle gets in a bind, and you push it too far, something like that, or if the cap deteriorates, and you get moisture down in there. Just a quick, easy rebuild process for you. Well get it put back together now. That thrust washer, and that bearing that came with the kit, so you just want to keep that in mind. Youll slide that new portion down on there. Bring that outer tube right back down over. Youll see that screw just passes right up in there. This plate sets right down on that bearing. Take the flange bushing with the larger diameter hole, and get that lined up, and slide down there. We can replace that flat washer. Now, that thicker diameter pin that was a little bit shorter, just a smooth pin, it's going to fit right in this opening. We want to capture that pin right in that opening on the bottom of the gear just like that. Then we can put our flange bushings back in both sides. We want to take our new handle gear, and place it down and in, so make sure our gears mesh up there. Slide through our handle. Its going to go all the way through. Then the hole in the handle, we need to get that aligned with the opening on our gear, so we can put in our pin. It will be about right there. Take our new shear pin. Place that down and in. Then we can drive it in from that point about midway. All right, now well grab our new grease here, get that spread all around our gears. Certainly, dont want so much that its running out of the cap of the jack or anything, but you can put plenty in there. You aint going to hurt anything. Then with the grease gun, you have a grease Zerk 00:07:40 right there that'll allow you to grease that screw. Now, well just have to slide our new cap on there. You want to place the bolts in with the rounded portion of that carriage bolt facing the handle. We go through the other way youll see that bolt head kind of sticks out there, and we want to reduce that. Thats all there is to it. You can see back nice and smooth operation. We hope that shows you with a little bit of time and a few parts you can rebuild your jack rather than going through a complete replacement process.

Customer Satisfaction Score:

Customer Reviews

Replacement Thrust Bearing Kit for Bulldog Trailer Jacks - 7,000-lb to 8,000-lb Capacity - BD500224

Average Customer Rating:  5.0 out of 5 stars   (31 Customer Reviews)

Replaces the bearing, nut, and washer for your Bulldog trailer jacks with 7,000-lb to 8,000-lb static capacity.


I order these thrust bearings to restore my welded on tongue jack. They came in faster than they told me and are a perfect fit.


Ordered the bearing assembly, which,btw, came quickly. I removed the old rusted, deteorated original one which was a lot easier to replace than I realized. Exact match as indicated on their site. Added additional lube when reassembling. Jack works great now. The original one in the jack wasn't that old. I think when the trailer was manufactured, they welded the jack to the mounting bracket and damaged the bearings due to improper grounding while welding.
Great product and super site. Will deal with again in future. Big thank you

John W.


Works fine, even after a year. Dont even think about it anymore. Thanks


I bought all the parts to rebuild my Bulldog 8000lb boat trailer jack from etrailer. Everything fit like a glove . Now when I crank the jack up and down it it doesn't hang up. Great place to buy parts very knowledgeable people about the products they sell.


These parts replaced the rusty, broken bearings and washers on my Bulldog jack. It was easy to install and I recommend pre greasing all the components and the rest of the jack as well at this time, it will make using the jack much easier!


Rental trailers take a fair bit of abuse from customers, and this bearing seems to be standing up to the sometimes abusive use.
Fits perfectly in the jack housing, and winds smoothly even under heavy load.


Replacement bearing for my Bulldog trailer jack fit perfectly. Requires much less effort to raise the loaded dump trailer


My local trailer repair shop didn't want to fix my trailer jack thanks to I was able to fix it for small change.


great trailer jack still in service and solving our lifting problems !!

thanks for the great product.


I always order from They are the only place that carries everything under the sun for our equipment. Thanks for always being there!


Great transaction. Bearing fitted now trailer is back on the job . Thank you Phil


The bearings are what I needed and my parts came in one day ahead of scheduled.


Exact replacement part fit as expected.


The bearing arrived very fast and was an exact fit.

Bulldog R.


Better than the original Bearing


Product came quickly and saved us from replacing expensive hitch.


Exact replacement


Item was spot on replacement part. Already in use and working perfect


Correct part fair price on time


Nothing but good things to say!!! Thanks for the great service!!


Arrived as described. Product description was accurate. Price was reasonable.


Great prices and fast shipping. Will be ordering again!!


product worked great. it took awhile to receive but all's good


Affordable and good quality


Thanks for your help selecting the right bearing


Bearing fit right in place. Thanks


I have bought these bearing they are working excellent.

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Info for this part was:

Employee Lindsey S
Written by:
Lindsey S
Employee Jameson C
Expert Research:
Jameson C
Employee Kathleen M
Video Edited:
Kathleen M
Employee Laura H
Updated by:
Laura H
Employee Wilson B
Updated by:
Wilson B
Employee Alexander C
Updated by:
Alexander C
Employee Randy B
Installed by:
Randy B

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