TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 2 Download
Page 114 of 953
3-50. CROSSOVER PIPE REPLACEMENT This task covers: a. Removal b. Installation INITIAL SETUP: Tools General mechanic’s tool kit: automotive (Appendix B, Item 1) Materials/Parts Nine locknuts (Appendix G, Item 128) Two manifold seals (Appendix G, Item 197) Gasket (Appendix G, Item 42) Manual References TM 9-2320-280-10 TM 9-2320-280-24P Equipment Condition • Engine access cover removed (para. 10-15). • Right exhaust manifold rear heat shield removed (para. 3-54). General Safety Instructions Do not touch hot exhaust system components with bare hands. WARNING Do not touch hot exhaust system components with bare hands. Severe injury will result. 1. Remove two clamps (17) and heat shield (18) from crossover pipe (3). 2. Remove three locknuts (1), washers (2), capscrews (4), washers (2), and crossover pipe (3) from right exhaust manifold (5). Discard locknuts (1). 3. Remove three locknuts (14), washers (13), capscrews (16), washers (13) , and crossover pipe (3) from muffler (12). Discard locknuts (14). 4. Remove three locknuts (10), washers (8), capscrews (7), washers (8), and crossover pipe (3) from left exhaust manifold (9). Discard locknuts (10). 5. Remove and discard two manifold seals (6) and (11) and gasket (15). 1. Install manifold seal (11) and crossover pipe (3) on left exhaust manifold (9) with three washers (8), capscrews (7), washers (8), and locknuts (10). 2. Install gasket (15) and crossover pipe (3) on muffler (12) with three washers (13), capscrew (16), washers (13), and locknuts (14). 3. Install manifold seal (6) and crossover pipe (3) on right exhaust manifold (5) with three washers (2), capscrews (4), washers (2), and locknuts (1). 4. Tighten locknuts (1), (10), and (14) to 26 lb-ft (35 N•m). 5. Install heat shield (18) on crossover pipe (3) with two clamps (17). b. Installation a. Removal TM 9-2320-280-20-2 3-92 Change 3