Specifications include, but are not limited to: Contractor agrees to regularly and systematically examine, clean, lubricate and adjust the vertical transportation equipment and provide unlimited call back service 24 hours a day 7 days a week and, as conditions warrant, in the judgment of the Owner, repair or replace all portions of the elevator equipment including but not limited to the following: Elevator machine, including worm, gears, thrust bearings, drive sheaves shaft bearing, brake pulleys, brake coils, brake contacts, linings and all other components and parts of the machine and brake. Hoist motors, and solid state motor drives, including motor windings, rotating elements, including commutators, brushes, brush holders and bearings, and all other components and parts.