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

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

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BD500212 - Gear Parts Bulldog Trailer Jack,Camper Jacks
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Replacement gear kit fits Bulldog sidewind jacks with a 12,000-lb capacity. Call 800-298-1624 to order Bulldog accessories and parts part number BD500212 or order online at etrailer.com. Free expert support on all Bulldog products. Guaranteed Lowest Price 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 (31)
  • Q & A (36)
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Bulldog Accessories and Parts

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

Replacement gear kit fits Bulldog sidewind jacks with a 12,000-lb capacity.


Features:

  • Replacement gear kit fits Bulldog sidewind jacks with 12,000-lb capacity
  • May be needed to install Bulldog powered-drive kit (BD1824200100) on your jack


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"


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

Item # BD500212






Customer Reviews

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

Average Customer Rating:  4.8 out of 5 stars   (31 Customer Reviews)

Replacement gear kit fits Bulldog sidewind jacks with a 12,000-lb capacity.

- BD500212
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.



- BD500212
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.



- BD500212
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.



- BD500212
by:

Exact replacement



- BD500212
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.



- BD500212
by:

It works as it should.



- BD500212
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!!



- BD500212
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.



- BD500212
by:

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



- BD500212
by:

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



- BD500212
by:

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



- BD500212
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.



- BD500212
by:

gears were right from casting ,should have been had the gear teeth cleaned and machined smooth. thank you for all the help.



- BD500212
by:

Product showed up when they said it wou ld.



- BD500212
by:

Parts worked out great. Jack back in se rvice.



- BD500212
by:

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



- BD500212
by:

No problems. ...



- BD500212
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.



- BD500212
by:

The parts were perfect



- BD500212
by:

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



- BD500212
by:

The new gear works good. Thanks



- BD500212
by:

Part is perfect. Worked great. Just what I ordered



- BD500212
by:

Great service great parts



- BD500212
by:

Exactly what I ordered



- BD500212
by:


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Show More Reviews

Ask the Experts about this Bulldog Accessories and Parts

  • 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.
    view full answer...
  • 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.
    view full answer...
  • 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...
    view full answer...
  • Heavy-Duty 12000 lb Bulldog Jack Replacement Cross Shaft and Bushings Recommendation
    I have an option for you, but I spoke to my contact at Bulldog to try and get a replacement cross shaft for you and he said they are not available. He said that you will just need to get a 12 inch long section of 1 inch cold rolled steel and then drill a .4 of an inch on either end of the rod 1-1/4 from the ends and then a 1/4 inch hole near the middle of the shaft but not completely centered. To get an idea what I am talking about check out the picture I attached. The Replacement...
    view full answer...
    Image 1 for
  • 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.
    view full answer...
  • Instructions for Disassembling a 12,000 lb Bulldog Jack
    I attached a picture that details how to disassemble the Bulldog 12,000 lb jacks.
    view full answer...
    Image 1 for
  • Are There Replacement Parts for my Frozen 12,000 lb Gooseneck Bulldog Jack
    The gooseneck trailer jacks are repairable. It is hard to say exactly what is wrong with your jack and how difficult it would be to repair, but we sell replacement parts that could fix your jack. We sell a Replacement Screw and Nut Kit, part # BD500217, as well as the Replacement Bulldog Sidewind Gear, part # BD500212, that you referenced. I would recommend that you take yours off and take it apart carefully and see if you can find what is causing the jack to be frozen and then replace...
    view full answer...
  • How to Install the Replacement Gear Kit for Bulldog Sidewind Jacks Part # BD500212
    In order to remove the .25" diameter pin that is included with the Replacement Gear Kit for Bulldog Sidewind Jacks part # BD500212 you will need to push the spring back to one side with a flathead screwdriver and the pin should fall right out. If it does not you may need to take a hole punch and tap it out. I have attached an install video of this process for you as well. Skip to 1:30 to see the .25" diameter pin removed.
    view full answer...
  • 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.
    view full answer...
    Image 1 for
  • Can a 10K Bulldog Drop Leg Trailer Jack be Trimmed to be Shorter
    The issue is that there is a screw inside the jack that turns in either direct to raise or lower the jack. It threads through a fixed nut. At the very top of the screw the threads are all mashed up so that the leg can't just fall out. Basically there isn't a way to take the legs out without having to cut open the jack and then it is pretty much useless because it will have lost its capacity. Could you go with a 7,200 pound jack? Drop leg jack # BD180354 is rated for 7,200 pounds at will...
    view full answer...
  • How to Install the Replacement Gear Kit # BD500212
    There is an initial pin that holds the shaft at the top of the jack into place. You will simply need to use a flat head screwdriver to compress the spring that is covering up that pin and the pin should fall right out. From there it is just a matter of pulling the internal gears and equipment out so that you can replace it with the Replacement Gear Kit # BD500212. I have attached a video of this process being done that you can use as a reference. This will then enable you to install...
    view full answer...
  • Replacement Gears for Bulldog Sidewind Jack BD182701
    We do carry the gears for your Bulldog Jack # BD182701; you need the Replacement Gear Kit for Bulldog # BD500212. The price can be found on the linked product page. I've added a link to a video review for you to take a look at as well.
    view full answer...
  • How to Access the Gears for the Heavy-Duty 12000 lb Bulldog Jacks
    To access the gears inside of the heavy-duty Bulldog jacks, like part # BD182415, you simply remove the screws that are holding on the plate covering the top of the jack. Once that plate is removed, the gears, pins and handle should be exposed. We also offer the Replacement Screw and Nut Kit, # BD500217, for the heavy-duty 12,000 lb capacity Bulldog jacks. I have attached two photos that show the inner workings of the heavy-duty Bulldog jacks for you to check out. The cross shaft...
    view full answer...
    Image 1 for Image 2 for
  • Replacement Repair Parts for 5th Wheel Landing Gear & Replacement Landing Gear Sets
    Since trailer makers don't maintain spec on the jacks they install (especially for a 5th wheel that is close to 17 years old) you'll want to check the jack for any part numbers to help you choose the correct repair kit. We do have bevel gear repair kits for jacks and landing gear from most major makers including Atwood, Stromberg Carlson, Fulton and others. In some cases repair kits for one brand will work fine for another since many of these products do share a common manufacturing...
    view full answer...
  • Inside and Outside Diameters of Bulldog # BD500212 Replacement Gear Set
    The # BD500212 Bulldog Replacement Sidewind Jack Gears are compatible with Bulldog-branded sidewind 12K capacity jacks. The larger of the two gears has an OD of 3.42 inches and an ID of .875. The smaller gear has an OD of 2.50 inches and an ID of 1 inch.
    view full answer...
    Image 1 for
  • 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.
    view full answer...
  • Bulldog 12k Jack Recommendation where the Pull Pin is on the Same Side as the Crank Handle
    What you would need is a Bulldog Square Jack # BD182804. This jack has the handle on the same side as the pull pin for the jack extension and should be exactly what you need. I attached a review video for this product for you to check out also.
    view full answer...
  • Replacement Gear Kit for Bulldog 12,000 lb Capacity Sidewind Jack
    We do have the inner workings of a Bulldog 12,000 lb capacity sidewind jack, if you were referring to the gears. If you have a sidewind jack, the correct replacement part is the Replacement Gear Kit for Bulldog Sidewind Jacks with 12,000 lb Capacity # BD500212.
    view full answer...
  • Is Gear Kit Needed to Install Bulldog Powered-Drive Kit for 12,000 Pound Trailer Jacks
    The Replacement Gear Kit # BD500212 is only needed with the Powered-Drive Kit # BD1824200100 if the jack was manufactured before 2006.
    view full answer...
  • 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.
    view full answer...
  • 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.
    view full answer...
  • 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...
    view full answer...
    Image 1 for Image 2 for
  • 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...
    view full answer...
    Image 1 for Image 2 for
  • 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.
    view full answer...
  • 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.
    view full answer...
  • Gear Replacement for Bulldog Trailer Jack BD182404
    Could you get me the brand of the jack possibly?
    view full answer...
  • Replacement Parts For 12,000 lb Jack
    We don't have any Trailer Tough brand jacks, however, the Replacement Screw and Nut Kit for 12000-lb Capacity Bulldog Jacks, # BD500217 may work. If you trade out the gears # BD500212 and bearing # BD001015, you will basically have a new jack on the inside. You could also just replace the entire jack with the Bulldog Side Wind Jack Assembly - 12,500 lbs # BD182700. If you want the hand crank you will need # BD015181.
    view full answer...

Do you have a question about this Accessories and Part?




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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee John H
Expert Research:
John H
Employee Lindsey S
Written by:
Lindsey S
Employee Jacob T
Video Edited:
Jacob T
Employee Laura H
Updated by:
Laura H
Employee Rachael H
Updated by:
Rachael H
Employee Wilson B
Updated by:
Wilson B
Employee Randy B
Installed by:
Randy B
Employee Zach D
Video by:
Zach D

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