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 TB 740-97-4
idle until running smoothly. The engine will then be accelerated to 3/4 speed, without load, to assure coverage of all interior surfaces
of the lubricating system.
(b) Air-cooled dry sump engines which operate with no oil in the crankcase, the inspection plate, air box cover or
the plugs from the bottom of the crankcase will be removed and the entire interior of the crankcase will be sprayed with P-10
preservative lubricating oil, type I, grade 30, while rotating the engine crankshaft at least three complete revolutions.
c. Cooling System.
(1) Fresh water systems. Fresh water systems will be drained. Systems rusty or otherwise contaminated will be cleaned
using cleaning compound conforming to MIL-C-10597. Cleaned systems will be blown dry with dry compressed air. Filler caps and
drain plugs will be left open to provide ventilation. Removed caps and plugs will be bagged, identified and secured on or near the
point of use.
(2) Raw water systems. Raw water systems will be flushed with clean fresh water and blown dry with dry compressed
air. Circulation of air through the system will be provided by removal of filler caps, drain plugs and open valves. Extensive
disassembly of piping will not be accomplished to provide ventilation.
d. Fuel Systems.
(1)
Spark-ignition gasoline engines.
(a) Engines with carburetors. A portable container with two compartments will be positioned to provide gravity
feed to the engine. One compartment will contain gasoline and the other compartment will contain type P-9 preservative oil. The
engines fuel supply line will be disconnected at the most convenient point A flexible line from the portable container will be connected
to the fuel supply line leading to the engine. The container selector valve will be turned to the gasoline position. The engine will be
started and operated at fast idle until running smoothly, then accelerated to 3/4 speed without load. At the same time the fuel supply
selector valve will be switched to the preservative oil position. The instant the oil reaches the combustion chambers (evidenced by
loss of speed, misfiring, and excessive smoking) the ignition will be turned off. After the engine has stopped, the line from the
portable container will be disconnected from the engine fuel supply line. The engine fuel supply line will be reconnected. Fuel filters
and sediment bowls will be drained.
(b) Engines with fuel injectors. The injector fuel return coupling will be disconnected. A line will be connected to
the injector fuel return coupling on the engine to permit draining into a recovery container. The fuel system will then be preserved as
specified in (a) above. (The recovered fuel and oil mixture will not be used to preserve other fuel systems.)
(2)
Compression-ignition (diesel and multifuel) engines (2 and 4 cycle).
(a) Gasoline starting engines. A portable container with two compartments will be positioned to provide gravity
feed to the engine. One compartment will contain gasoline and the other compartment will contain type P-9 preservative oil. The
flexible line from the portable container will be connected to the engine fuel pump intake line. The engine fuel return line will be
disconnected at the quick-disconnect coupling. A transparent plastic line will be connected to the disconnected engine fuel return
line, and the other end will be inserted into a recovery container to collect the returned fuel. Another portable container will be
provided and will contain type P9 preservative oil. The diesel or multifuel engine fuel supply line will be disconnected at the most
convenient point nearest the fuel pump. The line from the portable container will be connected to the fuel-to-engine line at the point of
disconnect. Controls will be positioned for gasoline operation. The three-way valve of the two compartment container will be turned
to the gasoline "ON" position. The engine will be started and operated until running smoothly The engine speed will then be
increased to 3/4 speed and the container selector valve turned to the preservative oil "ON" position. Engine will be operated until it
begins to misfire, and the engine controls will immediately be switched to diesel or multifuel operation The engine will be operated at
1/2 speed until undiluted preservative oil is flowing into the recovery container. The engine will then be increased to 3/4 speed for
approximately 15 seconds and the engine then turned off. Portable container valves will be turned to "OFF" position and the lines
disconnected from the engine fuel intake lines. The engine fuel intake lines will be reconnected. The temporary fuel return line will be
disconnected and the permanent fuel return line reconnected. Fuel filters and sediment bowls will be drained. (The recovered fuel oil
mixture will not be used to preserve other fuel systems).
(b) Straight diesel and multifuel engines. The engine fuel intake line will be disconnected at the most convenient
accessible point nearest the fuel supply tank. A line from a portable container containing fuel conforming to VV-F-800 will be
connected to the fuel intake line leading to the
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