Twice a year, the Contractor will check all safety devices on unit (up/down limits, door switches, pressure relief valves). Check for presence and proper setting of all snap rings and clips on axles, cylinders, and rollers. Check rollers, pins, and bushings for any sign of wear (flat spots, missing fasteners, or dislodged bearings materials). Check all hydraulic fittings for cracks or leaks and clean up any seepage on or beneath the cylinders, also check hoses and electrical lines for abrasions or other abuse and check for snug connectors. The Contractor will check and change hydraulic fluid in cylinder if needed. The Contractor will clean the upper portion of the plate, lower rollers, and between the sides and curb angles. Clean all debris from the pit or from the vicinity of floor mounted units to avoid interference with the lift mechanism or rollers. Contractor will inspect the push-in bar and push-out plate assemblies for damage. Inspect the safety leg system and return spring operation and all welds under the leveler for fatigue or failure, particularly the top plate understructure. Check general condition of the dock leveler. Operate the dock leveler after service. Check for any abnormal noise or vibrations and the bumper protection condition. Any adjustment required between regularly scheduled visits is included at no charge. Lubricate as recommended by factory maintenance recommendations. Change oil as recommended. Repair or replace any commonly worn or damaged parts.
