TM 9-6115-664-13&P
4-42.
ENGINE EXHAUST DUCT ASSEMBLY MAINTENANCE
B.
INSPECTION.
1.
Inspect exhaust bellows for cuts, tears, or other damage. Ensure bellows material is sound.
2.
Inspect air outlet duct for holes, dents, cracks, warping, or other damage. Inspect for corrosion.
C.
INSTALLATION.
1.
Remove old silicon adhesive from air outlet duct (3, Figure 4-32). Make sure that mating surfaces are clean.
2.
Fit air outlet duct (3) in place around cylinder head. Secure using two bolts (7), lockwashers (8), and washers (9).
3.
Install two bolts (4), lockwashers (5), and washers (6). Apply a silicon bead to exposed edges of air outlet duct (3) to
seal junction of duct and cylinder head.
4.
Apply a thin layer of silicon to lip of air outlet duct (3) where it mates with exhaust bellows (1).
5.
Install exhaust bellows (1) onto air outlet duct (3) using new rivets.
6.
Mate exhaust bellows (1) to air duct (2, located in valve access door). Secure using screw (10), washer (11), and
lockwasher (12).
7.
Install engine air filter and filter base (Para. 4-43).
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