Table   2-1.   Preventive   Maintenance   Checks   and   Services Item No. 9 10 11 12 13 14 15 Interval Semi- annually Semi- annually Semi - annually Semi- annually Semi - annually Semi- annually Semi- annually for  Pumping  Assembly  Model  609-A.  (Continued) Location Item   to Check/Service PUMPING  ASSEMBLY Control   Panel Assembly ENGINE Engine Intake   and Exhaust    Manifolds Rocker  Arm Assembly Fuel   Transfer Pump  Assembly Cooling   System Hoses Water  Pump Assembly   and   Fan Procedure Remove  control  panel  cover ( p a r a    2 . 1 6 . 1 ) .    I n s p e c t    f or leaks   and   loose   hose connections.   Tighten   loose hose   connections.   Inspect for   damaged   wiring   harness, loose   wires,   and   corrosion. Tighten   loose   wire connections.   Replace   or repair   damaged   wiring harness   (para   2.17). Replace   damaged   or inoperable   gauges   and switches. Inspect   engine   for   cracks and   leaks.   Tighten   loose mounting   hardware.   Replace missing   mounting   hardware. If  engine  is  damaged  or leaking,   notify   direct support  maintenance. Inspect   for   cracks   and leaks.   Replace   intake   or exhaust   manifold   as required   (para   2.21.36). Check  and  adjust  valve clearance   as   required   (para 2 . 21 . 4 9 ). Inspect   for   loose   mounting hardware   and   fuel   line connections.   Inspect   pump for   cracks   and   leaks. Tighten   loose   mounting hardware   and   connections. Replace   fuel   transfer   pump as   required   (para   2.21.6). Inspect   cooling   system hoses   for   leaks,   damage, and   wear.   Replace   hoses   as required   (para   2.20.2). Inspect   for   loose   hose clamps.   Tighten   loose   hose clamps. Inspect  water  pump  assembly for   cracks   and   leaks. Inspect   fan   for   damage. Replace  fan  or  water  pump as   required   (para   2.21.43 or    2.21.42). Not   Fully   Mission Capable   if: Class   III   leak. Damaged   wiring harness   or   hoses. Class   III   leak. Damaged  or cracked  engine. Damaged  or missing   mounting hardware. Damaged  or cracked   manifold. Improper  valve clearance. C l a s s    I ,    I I ,    or III leak. damaged  or cracked   fuel transfer   pump. Missing   mounting hardware. Class   III   leak. Damaged   hoses. Missing   hose clamps. Class   III   leak. Damaged  or cracked   water pump  or  fan. 2-12 TM  10-4320-344-24