inder with piston displacement between 50 and 75 cubic
OPERATING
LEVEL
WITH
PRESERVATIVE
inches.
LUBRICATING OIL GOOD FOR OPERATION UNTIL
(4) Two ounces for each cylinder with piston
THE FIRST REQUIRED LUBRICANT CHANGE-DO
displacement over 75 cubic inches.
NOT DRAIN-CHECK OIL LEVEL -IF LOW FILL TO THE
OPERATING LEVEL WITH THE OPERATING OIL (MIL-
CAUTION
L-2104 APPLICABLE GRADE)". Tag will be attached to
Precaution will be taken to assure that the
the crankcase fill tubes.
amount of oil injected into the combustion
(2) Dry sump.
chambers and manifolds will not result in
(a) Crankcases of air-cooled engines that
hydrostatic lock-up of the engine. Prior to
are lubricated by adding lubricating oil to the fuel P-10
preserving additional engines, the first engine
preservative lubricating oil, type I, grade 10, 30 or 50 as
preserved will be allowed to stand idle for 12
applicable, will be added to the fuel in the ratio specified
hours. The engine crankshaft will be rotated
for normal operation The engine will be started and
manually, or by the starting motor if manual
operated at fast idle until running smoothly. The engine
rotation is not possible, to assure that the
will then be accelerated to 3/4 speed, without load, to
amount of oil injected into the combustion
assure coverage of all interior surfaces of the lubricating
chambers and manifolds permit free rotation of
system.
engine.
(b) Air-cooled dry sump engines which
b. Crankcases. Prior to preservation of the system
operate with no oil in the crankcase, the inspection plate,
and combustion chambers, the engine crankcase and
air box cover or the plugs will be removed from the
the crankcase of engine accessories will be preserved as
bottom of the crankcase and the entire interior of the
follows:
crankcase will be sprayed with P-10 preservative
(1) Wet sump.
lubricating oil, type I, grade 30, while rotating the engine
(a) Spark-ignition engines and compression-
crankshaft for at least three complete revolutions.
ignition engines operating at output level up to 150 psi,
(c). Cooling Systems. The cooling systems will be
brake mean effective pressure (bmep). At the beginning
drained. Systems rusty or otherwise contaminated will
of engine preservation the engine crankcase, and the
be cleaned using compound conforming to MIL-C-10597.
crankcases of any mounted accessories having a
Cleaned systems will be blown dry with dry compressed
separate crankcase from the engine, will be filled to the
air. Filler caps and drain plugs will be bagged, identified,
operating level with P-10 preservative lubricating oil, type
and secured on or near the point of use.
I, grade 10, 30 or 50, as applicable. Upon completion of
d. Fuel Systems.
engine preservation, the preservative oil will remain in
(1) Spark-ignition gasoline engines.
the crankcases. A tag will be prepared for each
(a) Engines with carburetors. A portable
crankcase indicating :"THIS CRANKCASE IS FILLED
container with two compartments will be positioned to
TO THE OPERATING LEVEL WITH PRESERVATIVE
provide gravity feed to the engine. One compartment will
LUBRICATING OIL GOOD FOR OPERATION UNTIL
contain gasoline and the other compartment will contain
THE FIRST REQUIRED LUBRICANT CHANGE-DO
type P-9 preservative oil. The engines fuel supply line
NOT DRAIN-CHECK OIL LEVEL-IF LOW FILL TO THE
will be disconnected at the most convenient point. A
OPERATING LEVEL WITH THE OPERATING OIL (MIL-
flexible line from the portable container will be connected
L-2104, APPLICABLE GRADE)". The tags WILL be
to the fuel supply line leading to the engine. The
attached to the crankcase fill tubes.
container selector valve will be started and operated at
(b) Compression-ignition engines operating
fast idle until running smoothly, then accelerated to 3/4
at output levels of 150 psi (bmep) and above. At the
speed without load. At the same time the fuel supply
beginning of engine preservation, the engine crankcase,
selector valve will be switched to the preservative oil
and the crankcases of any mounted accessories having
position The instant the oil reaches the combustion
a separate crankcase from the engine, will be filled to the
chambers (evidenced by loss of speed, misfiring, and
operating level with P-10 preservative lubricating oil, type
excessive smoking) the ignition turned off. After the
II grade 10, 30 or 50, as applicable. Upon completion of
engine has stopped,
engine preservation, the preservative oil remain in the
crankcases. A tag will be preared for each crankcase
indicating: "THIS CRANKCASE IS FILLED TO THE
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