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Section VII. MAINTENANCE OF EXHAUST SYSTEM
4-14. Description
b. Cleaning and Inspection.
The muffler (fig. 1-1) is a hollow cylinder con-
Clean all parts in a well-ventilated area.
taining internal baffles which break up the flow
Avoid inhalation of solvent fumes and
pattern of the exhaust gases expelled by the engine
prolonged exposure of the skin to
to provide quiet engine operation. It is mounted on
cleaning solvent. Wash exposed skin
top the engine and connected to the manifold
thoroughly.
exhaust port by a pipe nipple.
4-15. Muffler and Piping
a wire brush. Wipe with a cloth dampened with
a. Removal and Disassembly. R e m o v e and
cleaning solvent (fed. spec. P-D-680).
disassemble the muffler and related parts from the
(2) Clean all remaining parts with cleaning
engine by following the sequence indicated in figure
solvent.
4-1.
(3) Inspect the muffler for cracks, holes,
severe rust, and other damage; replace a damaged
muffler.
(4) Inspect the remaining parts for cracks,
distortion, damaged threads, and other damage;
replace damaged parts.
c. Reassembly and Installation. R e a s s e m b l y o f
the muffler and piping is the reverse of disassembly.
Refer to figure 4-1.
1. Weather cap
3. Muffler
2. Clamp
4. Pipe nipple
Section VIII. MAINTENANCE OF FUEL SYSTEM
4-16. Description
the air before it enters the carburetor. A system of
hoses, pipes, and clamps connects the air cleaner
and carburetor. You maintain the air cleaner by
mounted on the left side of the flywheel housing. It
cleaning and replacing the filter element when
is a dry-type unit which uses a porous paper
necessary.
element to screen the particles of dust and dirt from
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