TM 10-3930-659-10 Table 2-1.  Preventive Maintenance Checks and Services (Con’t). LOCATION ITEM ITEM TO NOT FULLY MISSION NO. INTERVAL CHECK/ PROCEDURE CAPABLE IF: SERVICE 5 Before Engine Oil Level CAUTION · DO NOT overfill engine crankcase.  Dam- age to engine will result. · DO NOT permit dirt, dust, or grit to enter en- gine   oil   level   gage   tube.      Internal   engine damage  will  result  if  engine  oil  is  contami- nated. Check engine oil level (3) (see paragraph 3-6).  Level should be between ADD and FULL.  If level is below ADD, add oil to bring level between ADD and FULL marks. TA704483 2-17