Bulldog | Replacement Sidewind Bevel Gear Kit

SKU 500106

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5 In Stock as of 11/25/2020 5:22:05 AM EST.

Rebuild your trailer jack with a replacement sidewind bevel gear kit from Bulldog. Designed for 800 lbs., 1,000 lbs. and 5,000 lbs. Bulldog trailer jacks. This bevel gear kit is designed for use with 139, 159 and 170 Series jacks, and is a genuine Bulldog part.

Product Specs for Bulldog 500106

  • UPC: 086693001067
  • MPN: 500106
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Bulldog 500106 Details

Rebuild your trailer jack with a replacement sidewind bevel gear kit from Bulldog. Designed for 800 lbs, 1000 lbs, and 5000 lbs Bulldog trailer jacks.

Customer Q&A - Bulldog 500106

Could you tell me the shaft size that this gear fits???? And the measurement of the gear itself like across the base??? My gears are for a 1/2" shaft and measure about 1 3/8" across the bottom of the gear

The ID on these gears is 0.505" The OD across the base is 1.365" The thickness is 0.700"

will it fit a bulldog 12000lb jack

These will not fit a 12,000 lbs jack. Bulldog gear kit 500212 is designed for Bulldog 12,000 lbs jacks. Part 500212 are the gears located at the top of the jack that the sidewind crank would be connected to. We also carry the replacement screw for 12,000 lbs. jacks, part 500217, it is the screw that will raise and lower the leg

Will this product fit a 3000 lb. Crown Jack?

Bulldog bevel gear kit 500106 will also work with Crown jacks that have capacities of 2,000 lbs, 3,000 lbs or 5,000 lbs.


Bullodg trailer jacks are the unquestionable leader in the trailer and towing industry. Bulldog has been manufacturing the highest quality trailer jacks since 1919.

Whether it’s for livestock trailers, utility trailers, boat trailers or cargo haulers, every rugged and proven Bulldog product is certified ASABE S485 compliant – the ”gold standard” in proven performance for trailer jacks. Bulldog Trailer Jacks offer you proven quality, performance, and versatility. At TruckSpring we carry a wide range of Bulldog products and have you covered whatever your application.

Bulldog Warranty

1 Year Limited Warranty on all products

Some products have longer warranty coverage periods. This coverage is item by item and you should review the warranty information included. Bulldog warrants its products against defects in workmanship or material.

What the warranty does not cover

Normal wear and tear over time, damage from abuse or neglect, and damage resulting from accidents is not covered. Improper installation including welding will void any warranty. Any alteration of products beyond the included installation instructions will void the warranty.

You can view the full details of Bulldog’s warranty here.

How to get service

For warranty claims on Bulldog products contact Cequent Performance Products by phone at 1-800-521-0510.

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