TM   10-3930-643-20 ENGINE, FUEL, EXHAUST AND COOLING TROUBLESHOOTING AND MAINTENANCE. 4-26. Muffler   and   Aspirator.   (Sheet   1   of   4) This   task   covers: a.   Removal b . Cleaning/Inspection c . I n s t a l l a t i on INITIAL  SETUP Tools Materials/Parts Tool   Kit,   General   Mechanic’s Cleaning   solvent   P-D-680 Automotive (App.   C,   Item   2) NSN   5180-00-177-7033 Clean   cloth   (App.   C,   Item   10) Small  tag  (App.  C,  Item  12) Torques Except   for   special   torques   shown, all   fasteners   are   tightened   to   a standard  torque. Refer   to Appendix  E. EQUIPMENT  CONDITION References Condition   Description Paragraph   12-4 Engine   side   access   covers   removed. Go  to  sheet  2 4-109