TM   10-3930-643-20 BRAKE  TROUBLESHOOTING  AND  MAINTENANCE.  (cont) 8-3. Air   System   Troubleshooting. MALFUNCTION TEST OR INSPECTION CORRECTIVE   ACTION c.  OIL  IN  AIR  RESERVOIRS. Oil   in   air   reservoirs   indicates   compressor   problems. R e p l a c e     a ir compressor,   refer   to   paragraph   8-17. d. COMPRESSOR  OVERHEATS/CYCLES  CONSTANTLY. Step   1. Inspect   governor   for   proper   operation.   Listen   to   air   compressor load   and   unload.   Feel   governor. If   governor   is   unusually   hot   or   governor   does   not   unload   compressor, governor   is   defective   or   needs   adjustment.   Replace   or   adjust,   refer to   paragraph   8-20. Step   2. Inspect   for   broken   or   damaged   air   lines   and   fittings. If   replacement   is   necessary,   refer   to   paragraphs   8-16   and   8-17. If   hoses   and   fittings   are   good,   no   air   leaks   are   present   and   problem continues,   notify   Direct   Support. 8 -6