Position the under-reach under the front axle of the tractor and determine if you will need to do a pre-pick.
Stabilize the trailer by chocking the wheels.
If the trailer is on gravel or asphalt, WreckMaster recommends placing two hardwood 4 x 6 under each trailer leg.
Adjust the hardwood so that the trailer legs are directly over and in the center of the cribbing. The cribbing should be parallel to the trailer.
Lower the trailer legs until they come into contact with the surface of the ground or cribbing.