Access Rail System – R3212d Inspect endstop screws - Check to make sure that endstop screws have not loosened. They must be flush withthe top of the endstop.dWARNING! If endstop screws loosen, trolleys can roll off end of rail resulting in a fall, severe injury ordeath.12 - INSPECTION BEFORE EACH USE (Continued)12e Inspect ball bearings - If trolley assembly hasbeen removed from rail, make sure each trolley containsall 72 balls. Do not load trolley onto rail and use trolleyassembly if balls are missing.IMPORTANT! - If transferring trolley assembliesfrom one rail to another, be sure to have extra ballson hand.WARNING! If trolley has been removed fromrail, some balls may be lost. Do not use trol-leys if balls are missing. Trolleys with miss-ing balls can come off rail, resulting in a fall,severe injury,or death.eMissing balls