TM 9-6115-664-13&P
4-40.
EXTERNAL MUFFLER MAINTENANCE
3.
Inspect housing gasket for damage. Ensure secure
attachment. Replace as required using silicon
adhesive.
4.
Inspect external muffler for clogs, holes, cracks, or
other damage. Check for corrosion.
C.
INSTALLATION.
1.
Apply anti-seize compound to threads of two screws
(14, Figure 4-30). Secure housing (2) to APU
enclosure using screws (14), lockwashers (15), and
washers (16). These screws also secure internal
exhaust assembly to the inside of the APU
enclosure.
2.
Fit rain cap (12) and clamp (13) onto external muffler
(8). Secure by tightening clamp.
3.
Mate external muffler (8) to exhaust assembly air
duct.
4.
Apply anti-seize compound to threads of two screws
(9).
Secure
muffler
(8)
using
screws
(9),
lockwashers (10), and washers (11).
5.
Apply anti-seize compound to threads of four screws
(3). Install muffler cover (1) using screws (3),
lockwashers (4), washers (5), and spacers (6).
Figure 4-30. External Muffler
4-99
