TM 10-3930-659-34 Section III.  EXHAUST SYSTEM MAINTENANCE Paragraph Page Number Paragraph Title Number 4-20 Exhaust Elbow and Exhaust Adapter Replacement................................ 4-81 4-21 Exhaust Manifold Replacement .............................................................. 4-83 4-20.  EXHAUST ELBOW AND EXHAUST ADAPTER REPLACEMENT. This task covers: a. Removal b. Installation INITIAL SETUP: Equipment Conditions: Tools/Test Equipment: • Muffler removed (see TM 10-3930-659-20) • General mechanic's tool kit (Item 71, Appendix E) • Torque wrench, 0-175 Ib.-ft (Item 81, Appendix E) References: • TM 10-3930-659-20 General Safety Instructions: • DO NOT perform engine cooling system mainte- nance unless engine is cold. 4-81