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 TM 55-1925-204-12
further isolation may be necessary if it is one of the power panel
Continue testing of individual circuits until source of interference
(18, 21, 23, 24, 25, or 32, fig. 2-5).
is detected and corrected.
Section VII. MAINTENANCE OF THE PROPULSION ENGINE
4-13. Cylinder and Sleeve
4-12. General
The propulsion engine is a Fairbanks-Model 37F16, slow speed,
a. General. The cylinder is a one piece casting with an
two cycle diesel fuel injection engine. It has six vertical
integral water jacket. The water jacket is a cored annular space
individual cylinders, with a bore of 16 inches, and a stroke of 20
thru which cooling water is circulated. The cylinder wall is
inches. It turns with a maximum speed of 300 rpms, and
lubricated through tubes, with oil supplied by the force feed
develops 1,200 hp. Intake and exhaust ports are openings on
lubricator. A sleeve is bolted to the lower part of each cylinder,
the sides of cylinders, at approximately 65o above bottom dead
holding three oil scraper rings. These rings collect surplus oil in
center. Scavenging air enters cylinders from the air receiver
order to prevent an oversupply of oil in the lower base.
(intake manifold) upon opening of intake ports by the passing of
b. Removal.
the piston on its downward (power) stroke. This fresh air, at a
(1) Remove the cylinder head and valves (para 3-
pressure of from one and one-half to two and one-half psi,
assists in removing the exhaust gases from the cylinder, as well
(2) Remove the piston and connecting rod (para 3-
as forming the combustible when the piston moves upward on
the compression stroke. This engine is directly reversible, and
(3) Remove the exhaust manifold section (fig. 4-3),
is attached to the propeller and shaft through a thrust bearing at
by removing all connection, and side hole covers, then reach
the stern (flywheel) end.
through side hole covers and disconnect manifold from exhaust
port by removing nuts from the studs. Remove the water
header section (para 3-19).
4-8
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