EASY INSTALLATION 1.Block the wheels and support the trailer ″A″ frame securely. 2.Remove the existing jack. 3.Install the Electric Tongue Jack using original nuts and bolts. Align the motor head so that the motor housing is facing the front of the “A” frame. 4.Connect the red positive lead to the positive terminal of the battery. Connect the black ground wire to negative terminal of the battery. MOTORIZED OPERATION 1. Block trailer wheels securely. 2. The 4000 Electric Tongue Jack is operated by means of the Toggle Switch located under the motor housing. 3. Extend the jack by holding the Toggle Switch in the Extend position. 4. Retract the jack by holding the Toggle Switch in the Retract position. The jack is now fully retracted. MANUAL OPERATION 1. Remove twist cap in the access hole. (located top center of the housing cover) 2. Insert the 11mm deep well socket (included) in the access hole, over the drive spindle tang. Rotate the socket clockwise to retract and counter clockwise extend. 3. When complete, remove socket and replace twist cap, and reassemble the fuse connection. Sturdy Base Plate Our electric tongue jack is equipped with 6-inch diameter quick extension feet plate gives you more stable support. Vertical Trave The height of electric trailer jack can be adjusted between 27.11-50 inches. The inner tube diameter is 2 inches, the outer tube diameter is 2.25 inches, working voltage is 12V DC, with a working current of less than 30A. High Quality Construction This 12V DC Power Tongue Jack is made from sturdy, corrosion-resistant steel, and can hold up to 4000lbs.