![]() ![]() ![]() On weld on jacks, the retracted length will be from the top of the jack to the bottom of the retracted leg.Ĭlearance Height: This is a measurement taken from the center of the trailer jack mount to the top of the jack. Retracted Height: The length of the jack from the center of the mount to the bottom of the retracted leg. On weld on jacks, the extended length will be from the top of the jack to the bottom of the extended leg. Jacks will be listed with a retracted and extended length and some with clearance height.Įxtended Height: The length of the jack from the center of the mounting bracket to the bottom of the extended leg. Travel is the next specification to consider when purchasing a jack. There are also other more advanced options beyond the basic trailer jack. Different trailer configurations will allow clearance for different crank styles and the correct crank location can save you from busted knuckles. ![]() The first feature to consider is whether a side crank or a top crank jack will be more suitable. There are extra features to consider when selecting a trailer jack that may make using the jack and trailer more convenient. Typically, side frame trailer jacks mounted with brackets will offer a swivel function that swings the jack upwards, parallel to the trailer to keep it out of the way and away from road hazards. Side frame mounting jacks will mount to the side of the frame near the coupler using bolt-on or weld-on brackets, or they may be directly welded to the frame depending on the style chosen. Side frame trailer jacks are typically used on trailers with straight tongues, but they will also work on A-Frame style trailers that may not have the mounting plate for an A-Frame trailer jack. ![]()
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