Equalizer Systems for Horse Trailers & Cargo Trailers:Do you have a to hand crank your trailer? I would imagine it’s a burden for you to do it. We have the answer to your problem the Equalizer Hydraulic Jacks. Let your Equalizer Jack do the work for you with speed and ease. We carry different hydraulic jacks for different weights. Equalizer Hydraulic Jacks are the #1 lift systems in the trailer industry providing the most advanced lifting systems around. Free shipping on most Equalizer Hydraulic Lift Systems. FREE SHIPPING 48 STATES. Best Prices in the country.