ARMY TM 9-2805-257-14 AIR FORCE TO 38G2-103-2 NAVY NAVFAC P-8-612-14E 4-32. Breather  Line. This task covers: a.  Removal  (oil  bath) d. Removal (dry) b.  Inspection  (oil  bath) e.  Inspection  (dry) c.  Installation  (oil  bath) f.  Installation  (dry) INITIAL  SETUP Tools Equipment   Condition General Mechanic’s Tool Kit (Item 1, Appendix B) Cylinder  head  covers  removed  (para.  4-15). Materials/Parts Rags, Wiping (Item 6, Appendix D) Solvent,  Drycleaning  (Item  7,  Appendix  D) Rubber  Sleeve  (NSN  5365-00-215-7421) a.   Removal. Oil Bath. (figure 4-24) (1) Loosen coupling nut (1) on crankshaft side rocker cover (2). (2) Loosen coupling nut (3) on flywheel side rocker cover (4). (3) Loosen coupling nut (5) on air cleaner (6) and remove breather line (7). (4) Remove coupling nut (5) and rubber sleeve (8) from breather line (7). b. Inspection. (1) (2) (3) (4) 4-54 WARNING Drycleaning  solvent  PD-680  used  to  clean  parts  is  potentially  dangerous  to  personnel  and property. Avoid repeated and prolonged skin contact. Do not use near open flame or excessive heat. Flash point of solvent is 100°F-138°F (38°C-60°C). Clean  breather  line  and  coupling  nut  with  dry  cleaning  solvent  and  dry  thoroughly Ensure there are no obstructions in breather line. Inspect coupling nuts (1), (3) and (5) for signs of stripped threads or other damage, and replace breather line if damage is found. Inspect rubber sleeve (8) replace if ripped or otherwise damaged.