A-Frame Trailer Jack With Foot And Mounting Hardware Bulldog
(Bulldog Part #: JB-155157-73)
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Delivered by 04/02/19 if ordered by 2:30pm CT today

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This item is a Sidewind, Bulldog Tongue Jack with a Corrosion Resistant Gunflint Grey Paint. It is Ideal for RV and Travel Trailer Applications. This A-Frame Jack has a Front-Facing Sidewind Crank with a High Quality Gear Train.

  • Bulldog model number SWL 155X (RV)
  • Please note that the foot is removable and not fixed. If you need the foot to become fixed onto the jack, drill a hole into the foot post matching the hole diameter of the inner jack post. A retaining pin will be needed but is not included with this assembly.


Rating2,000 lbs
Travel13 inches
Extended (B)21.5 inches
Outer Tube2.25 inches
Inner Tube2 inches
Retracted (A)8.60 inches
Clearance (C)13 inches


  • The High Strength Mounting Bracket Provides Easy Bolt-On or Weld-On Installation - Mounting hardware included
  • Foot has a zinc plated finish


1919 - In a small third floor room over his car dealership in Wausau, Wisconsin, Thomas J. Jacob begins making high-quality precision tools of his own design. His venture becomes known as the Hammer Blow Tool Company. The death of a favorite hunting dog due to an accident involving a poorly-designed trailer hitch leads Jacob to develop the first drop-forged ball-and-socket trailer hitch, which he names the "Never Lets Go" Bull Dog. More inventions follow, positioning Hammer Blow at the forefront of the trailer industry at its infancy.

1930's - Demonstration models of camper trailers built by Jacob at the Chicago World's Fair set off a period of rapid growth in the industry.

1940's - Jacob dies in 1945. His wife, Lula, takes over Hammer Blow and guides it with great success for more than 20 years.

1960's - In 1967, Lula Jacob sells Hammer Blow to Neway Equipment Company of Muskegon, Michigan, which later sells to Lear Siegler, Inc.

1970's - In 1977, private investors led by Thomas J. Reinhart purchase and rename The HammerBlow Corporation. Expansion of the mechanical jack line and related products continues for more than a decade.

The above information has been provided by the Manufacturer, and we cannot guarantee the accuracy thereof or endorse the opinions expressed.