If you've properly and safely disengaged the safety locks and the frames still do not lower, there are a couple things to check:

NOTE: If there is a vehicle on the lift and it is not lowering, contact QuickJack Technical Support before proceeding.

  1. Check the pressure in the air cylinders; inflate to 40 to 50 psi, but do not exceed 50 psi.
  2. Check to make sure the power unit has the correct power supplied. You should hear a clicking sound from the power unit when pressing Down on most power unit models.