TM 5-4310-451-14 2-8. LEAKAGE DEFINITIONS (Con’t). CAUTION When operating with Class I or II leaks, check fluid levels In addition to that required In PMCS.  Parts without fluid will stop working or may be damaged. b. Equipment operation Is allowed with minor (Class I or II) leakage.  Fluid levels in an Item/system affected with such leakage must be checked more frequently than required in PMCS.  When In doubt, notify your supervisor. c. Report Class III leaks IMMEDIATELY to your supervisor. Table  3-1. Operator/Crew Preventive Maintenance Checks and Services (PMCS) (Con’t) B-BEFORE D-DURING A-AFTER W-WEEKLY INTERVAL ITEM TO BE INSPECTED EQUIPMENT IS NOT ITEM B D A W PROCEDURE: CHECK FOR AND HAVE REPAIRED, READY/AVAILABLE IF NO. FILLED, OR ADJUSTED AS NEEDED. NOTE Perform Weekly (W) as well as Before (B) PMCS If: • You are the assigned operator but have not operated the air compressor unit since the last Weekly. • You are operating the air compressor unit for the first time. 1 VEHICLE EXTERIOR • a.  Check for fluid leakage or appearance of fluid leak- Any Class III leaks are found. age. • b.  Visually check for damaged piping or hoses, and Piping or hoses are leaking loose, missing, or damaged parts or broken.  Parts are missing or damaged. 2 HANDBRAKE LEVER • Check for tension in cable when applied No tension in cable. 3 TIRES • a Inspect tires for unusual wear or damage Tires have damage which could result in failure. • • b Visually check for evidence of low air pressure. • • c Inspect wheels for cracks and other damage Wheel is damaged or wheel Check for signs of looseness or missing wheel nuts are loose or missing. nuts. 2-9