TM 5-4310-393-14
3-15.3. ENGINE EXHAUST MUFFLER AND SPARK ARRESTER.
This task covers: A. Inspect B. Replace.
Tools:
Materials/Parts:
Tool kit, General Mechanic's Set Scratch
Shim Set (P/N 01284600)
Wire Brush NSN 7920-00-044-4857
Muffler (P/N MUF-0018)
Spark Arrester (P/N 18782-AP)
Equipment Conditions:
Engine secured, Muffler Cold
A.
Inspect.
1.
Cleaning the Muffler for Inspection.
a.
Remove two hex nuts (Figure 3-15, Item 6),
and washer (9) and remove the long bolt (2).Remove the
bottom cup (10).
b.
Remove u-bolt (7) and spark arrester (8).
c.
Remove hex nut (11) and disassemble
spark arrester.
d.
Using a stiff brush, clean soot, carbon, and
dirt from the cup, each spark arrester plate, and from the
inside of muffler (1) and bottom cup (10).
NOTE
For best results, clean all parts dry,
without solvents.
e.
examine the cleaned parts for corrosion or
burn-through
f.
If parts are satisfactory, reassemble in
reverse order. If unserviceable, replace the muffler.
FIGURE 3-15. ENGINE EXHAUST MUFFLER AND SPARK ARRESTER
B.
Replace
1.
Replacing the Muffler.
a.
Remove hex nuts (5) from studs (4) which secure the muffler to the crankcase. Remove and discard the shim
set (3).
b.
Replace the shim set, complete muffler and spark arrester with new parts as necessary, in reverse order of
removal.
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