Trailer Jack | 2-Speed Direct Weld Square | Bulldog | 12,000 lbs. Capacity

SKU 183903

Availability: Typically ships in 2 to 3 business days.

2-Speed Direct Weld Square Jack, Sidewind, 12.5 inch Travel, 29.5 inch Bracket to Ground Retracted, 12,000 lbs. Capacity.

Product Specs for Bulldog 183903

  • Capacity:12,000 lbs.
  • Trailer Jack Style:Sidewind
  • Jack TypeLanding Gear
  • Mount Type:Weld On
  • Foot or Wheel: Includes Foot
  • Gear Box Type:Traditional
  • Travel:12.50 inches
  • A Retracted:29.50 inches
  • B Extended:55.60 inches
  • Note:Crank Sold Separately
  • Instructions: Click to View Installation Instructions.
  • Manufacturer's Warranty:Limited 5 Year
  • UPC: 016118095906
  • MPN: 183903
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Bulldog 183903 Details

Bulldog’s 2-Speed Square Jacks makes cranking easier when fully loaded and faster when unloaded.

• State of the art 2 speed gearbox with power and speed for the most effective and efficient jack at all loads
• Designed for today’s standard agricultural, construction and industrial trailer applications
• User friendly design makes operation smooth and easy
• Engineered alloys for enhanced strength, stability and side load capability
• Planetary gearbox fits within the width profile of the jack’s outer tube, eliminating the need for spacers

Customer Q&A - Bulldog 183903

what powered drive kit will work with this unit that will lift 12000 pounds

Bulldog has a drive kit for the 2-speed jacks, part 1824180100. The use of the power drive kit reduces the lift capacity of the jack to 7,500 lbs. We contacted Bulldog and confirmed that there is no other higher-rated motor kit available for this jack.

What is the lift per crank revolution or the revolutions per inch of travel? I need to mate this jack to an existing jack of unknown manufacture.Thanks,Bob

Bulldog 2 speed jack 183903 has the following specs: Low gear: 1" every 29 turns High gear: 1" for every 9 turns


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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