Section VII. MAINTENANCE OF EXHAUST SYSTEM

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.

(1) Clean the muffler and exhaust piping with

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

Figure 4-1. Muffler and piping, exploded view.

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

a. Air Cleaner. The air cleaner (fig. 1-1) is

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

4-6