Refer to the owner’s manual. Before operating the hand crank to telescope the tripod up or down, make sure the tripod is on level ground and the legs have been completely extended creating a 90 degree angle with the legs and support arms connecting to the mast. Then ensure that the T-knobs on the telescoping mast at the handle (and above if using the 12ft tripod) are loosened. Try to operate the hand crank. If the tripod telescoping function still is not working call 877-246-4169 for additional assistance.