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Replacement Gear Kit for Bulldog Sidewind Jacks w/ 12,000-lb Capacity
Bulldog

Replacement Gear Kit for Bulldog Sidewind Jacks w/ 12,000-lb Capacity

Part Number: BD500212
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$83.78
Retail:$101.26
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Replaces the gears for your Bulldog square-tube jacks with 12,000-lb static weight capacity (BD182800, BD182804, BD182805, BD182815, BD182300, BD182304, BD182400, BD182404, BD182411, BD182415, BD182500, or BD182524). 1-800-940-8924 to order Bulldog accessories and parts part number BD500212 or order online at etrailer.com. Free expert support on all Bulldog products. Great prices and Fastest Shipping for Replacement Gear Kit for Bulldog Sidewind Jacks w/ 12,000-lb Capacity. Accessories and Parts reviews from real customers.
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  • Reviews (48)
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Bulldog Accessories and Parts - BD500212

  • Camper Jacks
  • Trailer Jack
  • Motor and Gear Parts
  • Gears
  • Bulldog

Replaces the gears for your Bulldog square-tube jacks with 12,000-lb static weight capacity (BD182800, BD182804, BD182805, BD182815, BD182300, BD182304, BD182400, BD182404, BD182411, BD182415, BD182500, or BD182524).


Features:

  • Replaces the gears for your Bulldog square-tube jacks with 12,000-lb static weight capacity
    • BD182800, BD182804, BD182805, BD182815, BD182300, BD182304, BD182400, BD182404, BD182411, BD182415, BD182500, or BD182524
  • Includes all that you need to replace or repair gears


Specs:

  • Large gear dimensions:
    • Height: 1.43"
    • Outer diameter: 3.42"
    • Inner diameter: 0.875"
  • Small gear dimensions:
    • Height: 1.25"
    • Outer diameter: 2.50"
    • Inner diameter: 1.00"
  • Two hex nuts/washers dimensions:
    • Height: 0.50"
    • Outer diameter: 1.5"
    • Inner diameter: 1.00"
  • Washer dimensions:
    • Outer diameter: 1.75"
    • Inner diameter: 0.875"
  • Long roll pin dimensions:
    • Length: 1.50"
    • Diameter: 0.30"
  • Short roll pin dimensions:
    • Length: 1.25"
    • Diameter: 0.25"
  • Spring dimensions:
    • Length: 4.47"
    • Large end outer diameter: 1.45"
    • Tapered end outer diameter: 1.17"
    • Inner diameter: 1.00"


Fits:

  • Bulldog jacks with 12,000-lb static weight capacity: BD182800, BD182804, BD182805, BD182815, BD182300, BD182304, BD182400, BD182404, BD182411, BD182415, BD182500, and BD182524


500212 Replacement Gear Kit for Bull Dog - 12,000 lbs





Customer Satisfaction Score:


Customer Reviews

Replacement Gear Kit for Bulldog Sidewind Jacks w/ 12,000-lb Capacity - BD500212

Average Customer Rating:  4.9 out of 5 stars   (48 Customer Reviews)

Replaces the gears for your Bulldog square-tube jacks with 12,000-lb static weight capacity (BD182800, BD182804, BD182805, BD182815, BD182300, BD182304, BD182400, BD182404, BD182411, BD182415, BD182500, or BD182524).

by:

great service great price thank you we will do bz again-lee



by:

Fast shipping and good communications. etrailer has constantly delivered with all parts ordered and the one and only time there was damage to an item ordered, they sent me a new one next day. Awesome outfit to deal with.

Tyson profile picture

Tyson

1/13/2025

Still works well after a year !



by:

Delivered fast. Perfect fit for my 12k square bulldog



by:

Everything looked fine but maybe to small of a box I got a replacement handle shaft and it popped out of the box in transit, either a bigger box or a tighter fit with some paper or something so it can't move around as much



by:

These parts were a great time and money saver. The tongue jack on this trailer was welded to the trailer cross member by the trailer manufacture, so removing the old jack and welding on a new one was going to be expensive and time consuming; plus the trailer would be out of service for a couple of weeks. With the parts to rebuild the jack, we did the repair in less than two hours. As a bonus, the parts actually arrived two days sooner than promised. Thank you etrailer.com for the great service.



by:

It was too late



by:

Went to drop my gooseneck horse trailer after use and no-go! Apparently the screw jack became stripped over the years and needed to be replaced. The hardest thing about this project was removing the entire unit from beneath as shown in the pictures. For clearance I had to not only drive the rear wheels onto small ramps but also dig beneath the jack to drop everything out. Everything fit perfectly. The video was great at explaining things. Brendan gave me a few shipping options and items arrived promptly without breaking the bank.



by:

Parts came in a timely manner and were just what we needed. One year later and still going strong



by:

It works as it should.



by:

Exact fit parts. Instructions were helpful as were the available videos. Works much better and easier now. The original bulldog hitch worked for almost 20 years.



by:

Product was delivered quickly and was exactly what we were after. Turns out the kit covered several different versions of the jack assembly, but only minor modification (drilling out the pin hole in the cross shaft) was required for the included parts to drop into place. Great service, great product!!



by:

Did not know the make of the landing gear as all tags were removed when builder painted trailer. James with etrailer was very helpful in figuring out what was needed and the parts are are a perfect replacement for the damaged parts. Parts look to be well made and should last for many years. Thanks James and etrailer for the help.



by:

Just what we needed! Worked perfectly.
Thank
you etrailer!



by:

I RECIVED MY ORDER IN A TIMELY. MANER PARTS WERE WHAT I WANTED. THEY WORKED GREAT. I WOOD BUY FROM ETRAILER ALLWAYS



by:

Had just what I needed at a good price. It shipped immediately . . .and my trailer is back in business.



by:

prompt delivery. Still waiting for customer to come in for installation.



by:

I had questions if my old jack could be converted to electric and Conner answered
Immediately with how and the part number needed, these folks are spot on.



by:

Excellent Product. Very fast shipping. I will buy from etrailer again.



by:

Exact replacement



by:

Parts worked out great. Jack back in se rvice.



by:

Great service great parts



by:

It all was great but the shipping took forever, my fault I chose basic but damn that took long!! I just order the rod bc that ended up being the real problem and used priority shipping and you tell me how long it will take?



by:

Product worked exactly as described. I am very pleased, and it has saved my back.



by:

Website was great. Easy to use and full of useful information. Processing was quick and order arrived promptly. I was kept informed all the way through. Will definitely reuse and recommend.



by:

Great products. Other than a hard time driving out the old pin from sprocket, all parts assembled daily. Better than cutting of old assembly and welding new one one.


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Show More Reviews

See what our Experts say about this Bulldog Accessories and Parts

  • Gear Replacement for Bulldog Trailer Jack BD182404
    Could you get me the brand of the jack possibly?
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  • Will Bulldog Replacement Gear Kit Fit Pro Series Square Jack
    Hi Jeff; I'm fairly certain the # BD500212 gear kit will not work with the Pro Series jack but you can compare the measurements from the gear kit page to see if they match. The product images show the dimensions for all of the included parts. You can also try reaching out to the manufacturer to see if they have a gear kit but since it is a Pro Series I doubt they do. If you need a single gear there are some companies that can manufacture a new one for a reasonable price if you send them...
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  • How to Remove Pin in Handle Shaft to Replace Gears on an Older Bulldog Model 12 Square Jack
    I spoke to my contact at Bulldog who said that the Model 12, 180 Series Bulldog jack that you have is the older version of the the current 10K jacks like part # BD182500. Since you have the older version without the spring that you mentioned seeing in other videos it means that pin you are trying to remove has knurls on it. When it was first installed that pin hole was smooth and the knurls on the pin basically "carved" into that pin hole. To remove it you need to use a punch and quite...
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  • What is the Purpose of the Spring Inside of a Bulldog 12K Square Jack
    The spring that comes with gear set # BD500212 for Bulldog 12K jacks is a compression spring. It keeps tension on the upper gear to help keep in place and aligned. I have included a picture that shows where the inner pieces go inside the jack.
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  • Replacement Gear Kit for Ram Jack With 12,000 lb Capacity
    The # BD500212 is specifically made for Bulldog jacks. Based on the 12,000 lb capacity and 10,000 lb lift on your Ram jack it sounds like you have a TJD-12000 series jack like the # TJD-12000SP-F2. The correct gear kit would be the # TJD-12000-GR. If you need additional replacement parts we have the following: -Replacement Sidewind Crank for etrailer and Ram Square, Direct Weld Jacks - 10,000 lbs # TJD-12000-HD -Replacement Handle Shaft for etrailer and Ram Square, Direct Weld Jacks -...
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  • Troubleshooting A Roll Pin That Won't Slip Into Place In A Bulldog 10K Square Jack
    If you have the correct pin in place for your Bulldog Square Jack # BD182500 and it's sticking out that far then you would want to push it into the slot more to secure the gear in place. Cutting it off will most likely lead to it eventually failing and your gear working itself out of place. I'm assuming this is probably going to be challenging to do but you can try rotating it to have the pin facing up so you can try to push it in further or you could leave it how it is in the picture and...
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    Image 1 for
  • Gear Set and Replacement Spring for Bulldog 180 Series Sidewind Jack
    Hey Tyson, it looks like the kit you are needing is the part # BD500212 which is a gear set for your Bulldog 180 series jack that comes with the spring as well.
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  • Replacement Gears for 12,000 lb Leg from Unknown Brand
    The Replacement Gear Kit for Bulldog Sidewind Jacks w/ 12,000-lb Capacity # BD500212 are not a confirmed fit for all 12K legs. I've attached a photo with measurements to help you determine if this gear kit will work for your application. The Replacement Sidewind Gear Kit for etrailer and Ram Square, Direct Weld Jacks # TJD-12000-GR is another option. On this kit the taller gear has an inner diameter of 1-3/4 inches and an outside diameter of 2-1/2 inches. The shorter/wider gear has...
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    Image 1 for Image 2 for
  • Replacement Screw for Bulldog 12K Jack with 1 Inch Diameter Rod
    It doesn't sound like you have a 12K Bulldog Trailer Jack as they all used a 1-1/4" diameter threaded rod both pre-2003 and post-2003. Please keep in mind that the rod is measured by the threaded portion. If you can confirm the threaded rod is measured correctly then you would need to look for other identifying marks on the jack. If none are present then the only option I have for you is a full replacement like the Bulldog Square Jack part # BD182701 which has a 12,500 lb capacity and offers...
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  • Replacement Gears for Bulldog 10K Square Jack 182417
    Thanks for reaching out! To replace the inner gears of your Bulldog square jack you need the Bulldog Replacement Gear Kit # BD500212 which I confirmed with my contact at Bulldog will work for your 182417 jack. I've attached a few videos for you to check out as well.
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  • Which Replacement Screw And Gear Kit For Older Bulldog 180 Series Jack?
    We have exactly what you are looking for. For your older Bulldog 180 series jack you will need the Replacement Screw and Nut Kit for 12000-lb Capacity Bulldog Jacks # BD500217, and Replacement Gear Kit for Bulldog Sidewind Jacks # BD500212. You will need grease for the new gears so if you do not already have some I recommend using the LubriMatic Multi-Purpose Lithium Grease # L11316. I included videos for the products mentioned for you to take a look at.
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  • Replacement Screw And Gear Kit Needed For 12K Bulldog 180 Series Jack
    We do have the replacement screw and gear kit for your 12K Bulldog 180 Series Jack. You will need Gear Kit # BD500212 and Screw and Nut Kit # BD500217. You will also need grease for the new gears, so if you don't have any use # L11316. I included a video of a 12K Bulldog 180 Series Jack being rebuilt for you to take a look at.
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  • Does Replacement Gear Kit BD500212 Fit 3-Car Trailer Jack
    The Bulldog Replacement Gear Kit # BD500212 will not fit a 3-car trailer jack; this kit is only a direct replacement for Bulldog sidewind jacks with a 12,000 lb capacity. I have added a link below to our entire selection of replacement gears for trailer jacks, though you will need to know the model and capacity of your jack to ensure you get the right replacement.
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  • Replacement Parts for Bulldog Square Jack
    The replacement parts we have for the Bulldog Square Jack # BD182500 are a Replacement Gear Kit # BD500212 and a Replacement Screw and Nut Kit # BD500217. These are the two most likely aspects of the jack to be causing your problem. I have attached the only two diagrams we have related to this trailer jack. The inner tube is held to the outer tube by the screw and nut assembly.
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    Image 1 for Image 2 for
  • What is the Inner Diameter of Replacement Bearing for Bulldog Square Jacks, # BD001015
    I spoke with my contact at Bulldog regarding the Replacement Bearing for Bulldog Square Jacks, # BD001015. He stated that the inside diameter is 0.876 inches. This is 1 thousand of an inch larger than 7/8 inches. The outer diameter is 2 inches. We carry several other replacement gears for Bulldog jacks including # BD500106, # BD5002581360, # BD500156, and # BD500212.
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  • Recommended Rebuild Gear Kit for Bulldog Jack
    Without the spring that holds the shaft pin and gear in place, you likely will need to drive that pin out as it is likely pressed in. If it is really stuck in there, you may need to drill it out to ensure you don't damage the jack. Then you can use the Replacement Gear Kit for Bulldog Sidewind Jacks w/ 12,000-lb Capacity # BD500212.
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  • Are the Spring Returns of Bulldog Jacks Repairable if the Spring Return Function Stops Working
    It sounds like you have a spring return Bulldog landing gear jack that has a broken spring and now won't retract when you activate the release lever. I spoke to my contact at Bulldog and he said the springs aren't repairable so you would need to replace the jack with something like the part # BD182701.
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  • Can Bulldog 180 Series Landing Gear Jack be Rebuilt
    We do have the replacement screw and gear kit for your 12K Bulldog 180 that you could use to rebuild it. You will need Gear Kit # BD500212 and Screw and Nut Kit # BD500217. You will also need grease for the new gears, so if you don't have any use # L11316. I included a video of a 12K Bulldog 180 Series Jack being rebuilt for you to take a look at.
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  • Correct Replacement Motor for a Bulldog 12K Jack
    It sounds like either the motor is shot or the gears are worn. You're going to want to test the voltage of the motor first before deciding to replace it. If your motor is not getting enough voltage then you're just going to need to replace it with the Bulldog Powered-Drive Kit for Single-Speed Jacks w/ 12,000-lb Capacity # BD1824200100. This kit is going to include the powered-drive assembly, the torque stop tube with energy absorber, a terminal box, a wiring harness and switch box, a...
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  • Repair Kit for 12000-lb-Rated Bulldog Square Tube Jack
    The Bulldog Replacement Sidewind Gear Kit # BD500212 that you referenced is the correct repair kit for your Bulldog square tube jack according to my contact at Bulldog. The top cap you can use is part # BD017802. After you repair the jack you will want to apply some general purpose grease and extend and retract the jack fully a time or two to distribute the grease before installing the new top cap.
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  • Recommended Replacement Gears for a 015796 Hammerblow 180 Series Jack
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  • Replacement Spring for Bulldog Sidewind Jack with 12000-lbs Capacity
    I have a solution for you, but in order to replace the spring component on your Bulldog jack you would need to purchase the entire Replacement Gear Kit for Bulldog Sidewind Jacks w/ 12,000-lb Capacity # BD500212. This would be the only way to get the appropriate spring for this jack. Parts like this do malfunction occasionally, so it might be worth having the extra parts on hand in the event that the gears stripped out at some point in the future. You could also completely change all...
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  • Replacement Pins for Bulldog Square 12K Jack
    In order to repair a Bulldog 10K/12K Square Jack like part # BD182500 you must purchase the Replacement Gear Kit for Bulldog Sidewind Jacks w/ 12,000-lb Capacity part # BD500212. The individual replacement parts within the gear kit are no longer available separately from the manufacturer unfortunately.
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  • Instructions for Disassembling a 12,000 lb Bulldog Jack
    I attached a picture that details how to disassemble the Bulldog 12,000 lb jacks.
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Info for this part was:

Employee Mike L
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Mike L
Employee Jameson C
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Employee John H
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Employee Lindsey S
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Employee Jacob T
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