TM 9-6115-664-13&P
4-41.
INTERNAL EXHAUST ASSEMBLY MAINTENANCE
This task covers inspection and repair.
INITIAL SETUP
Tools:
Equipment Condition:
Shop Equipment, Automotive Maintenance
External Muffler Removed (Para. 4-40)
and Repair (Item 1, App. B)
In-Line Fuel Filter Detached From Mounting
Bracket (Para. 4-44)
Parts/Materials:
APU Cover Assembly Removed (Para. 4-12)
Adhesive, Silicon (Item 2, App. E)
Fuel Module Removed (Para. 4-30)
Anti-Seize Compound (Item 3, App. E)
Safety Wire (Item 13, App. E)
A.
REMOVAL.
WARNING
Internal exhaust assembly may be hot. Use caution when handling to prevent
bums. Allow time for parts to cool before removing.
NOTE
Discard and replace all lockwashers and locknuts when removed.
1.
Disconnect exhaust inlet hose (1, Figure 4-31) from fan shroud (2) by loosening clamp (3).
2.
Disconnect flexible exhaust hose (4) from adapter pipe (6) by loosening clamp (5).
3.
Remove exhaust assembly (11) from APU enclosure by removing two screws (12), lockwashers (13), and washers
(14). These screws also secure external muffler housing (16).
4.
Remove muffler blanket from exhaust assembly (11).
5.
Remove and discard safety wire that secures insulating wrap on exhaust pipe (10) and adapter pipe (6). Remove
insulating wrap.
6.
Loosen hose clamp (7) and disconnect engine exhaust hose from adapter pipe (6).
7.
Disconnect adapter pipe (6) from exhaust pipe (5) by removing screws (8) and lockwashers (9).
B.
INSPECTION.
1.
Inspect exhaust assembly for holes, dents, cracks, warping, or other damage. Inspect for corrosion.
4-100
