TM    9-6115-668-13 Table  2-4  Operator  Preventive  Maintenance  Checks  and  Services-continued. Item Location Not Fully Mission No. Interval Item   to   Check/Service Procedure Capable if: 81 After ENGINE  COMPART- MENT- continued Subcurrent filter 82 After 83 After Oil cooler and cylinder cooling fins Scavenge pump 84 After 85 After Supply air duct (cooling air in- let for diesel engine) Slave receptacle 86 After Oil level 87 After Fuel prefilter and two step fuel filter 88 After Battery charging alternator 89 After V belts 90 91 After Flame Glowplug System After Heating unit and heat exchanger inspect subcurrent filter for leaks, loose, or damage parts. Check oil cooler and cylinder cooling fins for dust buildup or oil leaks. Inspect scavenge pump for leaks or loose, damaged, or missing parts. Inspect supply air duct for looseness, Supply air duct is damage, or dirt. clogged. Inspect slave receptacle, and protec- Slave receptacle tive cover for looseness, damage, or connector is dam- corrosion. aged. Check diesel engine oil level (check Oil level is below cold oil level dots on dipstick). required   level. Inspect fuel prefilter and two step fuel filter for leaks, loose or damaged parts. Check battery charging alternator for Loose, damaged, or loose, damaged, or missing parts. missing parts. Inspect V belts for cracks, fraying and V belt(s) is (are) looseness. frayed or broken. Check that fuel line and cables are Any fuel leak, loose, firmly attached to both flame glow- damaged, or missing plugs. fuel  lines. Check that heating unit and heat ex- changer box are firmly attached to mounting plate; and check for loose, missing, or damaged hardware. Class III oil leak. Class III oil leak. Class III oil leak. Loose,  damaged,  or missing  parts. Any fuel leaks. If box is loose or any damaged,   loose   or missing hardware. 2 - 3 1