TM-9-2320-280-20-2
TRUCK, UTILITY: M998 SERIES
TECHNICAL MANUAL; UNIT MAINTENANCE; VOLUME 2 OF 3
JANUARY 1996
TM-9-2320-280-20-2 - Page 114 of 951
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
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