ARMY TM 9-6115-639-13 AIR FORCE TO 35C2-3-386-51 MARINE CORPS TM 10155A-13/1 Table 2-1.  Operator Preventive Maintenance Checks and Services for MEP 831A / 832A (continued) Item No. Interval Location: Item to Check/ Service Procedure Not Fully Mission Capable If: 13 Before   A8 Open  enclosure  cover.    Inspect  A8  and  area around  A8  for  signs  of  water.    If  water  is present, thoroughly dry out A8 before starting generator. Water is in A8 14 Before Engine oil a.  Open enclosure cover.  Remove oil fill cap      and check oil level.  If servicing is      required, refer to para. 3-1. b.  Inspect areas around oil filter and oil drain      hose for leaks. Class III oil leaks are present.  Refer to leakage class defini- tions (para. 2-5).   15 Before Engine air filter Inspect  air  filter  for  clogging  in  accordance with para. 3-9. Filter is clogged. 16 During VOLTAGE and LOAD meters (control panel) Monitor   output   levels   during   generator   set operation.    Adjust  output  as  required  using VOLTAGE ADJUST rheostat. Adjustments cannot be made. 17 During FUEL LEVEL Meter (located on control panel) a.   Monitor fuel level during generator set       operation. WARNING: Never service generator set while engine is   running.  Shut down unit before filling with   fuel.  Injury to personnel can occur if proper procedures are not followed. b.   Replenish fuel as follows:  Shut down       generator set.  Remove fuel fill cap and         fill with proper fuel.  Install fuel fill cap. Fuel level is empty or level meter is inoperable. 2-16 Change 1