TM 10-4320-226-14 Item No. 7 8 9 10 11 12 Table 2-2 Operator preventive Maintenance Checks and Services for-the 350 GPM pumping Assembly. (continued) Interval Before Before Before Before Before Before Location Item  to Check/Service ENGINE  ASSEMBLY CONTROL  PANEL ASSEMBLY CONTROL  PANEL PUMPING  ASSEMBLY SUCTION  AND DISCHARGE  VALVES FUEL  TANK FUEL TANK WHEEL  MOUNTED FRAME  ASSEMBLY TIRES AND WHEELS AXLE AND FRAME ASSEMBLY Procedure a. Check oil level. If Engine oil level is on or below the lower mark, add oil. b. Visually inspect unit for oil leaks. Inspect for damage and secure mounting  of  controls  and instruments. Check that valve turns. Check for leaks around attachment points. Service fuel tank (paragraph 3.7). Notify unit level maintenance of any leaks or  problems. Check for proper inflation; be sure tires are not excessively worn. Check that both tires are worn  evenly. Check for damaged wheels. Check that lug nuts on wheels are securely  tightened.  Check  that bearing caps are properly seated and  tight. Visually inspect for broken welds,    torsion spring, bent or otherwise damaged axle. Inspect for broken welds, reflectors,  damaged  landing  leg assemblies and damaged towbar. Not  Fully Mission Capable if: Oil leaks prevent proper  oil level to be maintained. Excessive damage  to control panel . Valve  does not  turn. Fuel tank leaks at any class or fuel tank not serviceable. Tires  flat  or missing. 2-9