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 TM 55-1925-204-12
(h) Repeat the procedure in steps (b) through
(c) Remove and clean the thermocouples of
(g) above for each cylinder of the engine.
all accumulations of carbon, then lay aside for later installation.
(d) Use the ratcheting device to turn the
engine over until the piston (of the cylinder which is to be
NOTE
cleaned) is at bottom dead center.
To effectively clean air receivers, first use a
(e) Reach in through hand hole in exhaust
cloth -dampened in clean fuel oil, then wipe
manifold, and thoroughly clean the exhaust ports of all carbon
dry with a clean cloth.
deposits, as well as the interior of the manifold section.
(f) Remove the cylinder compression relief
(i) Remove the air receiver covers by
valve (para 3-6 f.), insert a ships service air hose through the
removing nuts (fig. 4-4) and repeat the procedures in steps (b)
opening, and blow the carbon off the piston so it is perfectly
through (f) above on all cylinders then reinstall covers. Use a
clean.
new gasket under each cover.
CAUTION
located in the smoke stack. It can be reached for cleanout from
Turn the engine over one complete
door in stack on the boat deck. Proceed as follows:
revolution, to make sure no carbon has
cover from silencer.
ledged on top of the piston.
(b) Remove the accumulation of carbon from
the bottom of the silencer. When the accumulation is above
(g) Remove all carbon from the exhaust
normal, disconnect the exhaust pipe at top and bottom. Slide it
manifold and piping. When that cylinder is clean, install the
over on outlet section (fig. 4-8) and away from silencer
thermocouple, install new gasket at handhole cover, install the
cover and secure with nuts on the studs.
Figure 4-9. Silencer (muffler).
4-18
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