TM 5-6675-322-14 Table  9-1. OPERATOR   PREVENTIVE   MAINTENANCE   CHECKS   AND   SERVICES NOTE If   the   equipment   must   be   kept   in   continuous   operation,   check   and   service only   those   items   that   can   be   checked   and   serviced   without   disturbing   oper- a t i o n . Make   the   complete   checks   and   services   when   the   equipment   can   be shut   down. B - Before W - Weekly AN - Annually (Number)   -   Hundreds   of   Hours D - During M - Monthly S - Semiannually A . After Q - Quarterly BI - Biennially ITEM NO. 1 2 3 B B Q ITEM TO BE INSPECTED PROCEDURE SUPPORT ITEMS Magnifier    Lamp. 1. I n s p e c t    l e n s    f o r    c r a c k s ,    b r e a k s ,    o r    d i r t. Clean   as   required. 2. Inspect   arms   and   base   for   cracks   or   breaks. Service   Magnifier   Lamp. 1. Turn   off   magnifier   lamp. 2. Apply   small   amount   of   liquid   lens   cleaner   to lens   and   wipe   clean   with   cheesecloth. 3. Turn   on   magnifier   lamp. Vacuum    Cleaner. Inspect   vacuum   cleaner   for   damage   to housing,   frayed   or   worn   power   cord,   and   proper operation   of   motor. For  Readiness Reporting, Equipment Is Not Ready/ Available If: Lens    cracked or   broken. Arms   or   base cracked   or broken. Cracked   or broken housing. Frayed, worn   or damaged power   cord or   plug. Noisy   or improper motor o p e r a t i o n . 9-16