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 TB 740-97-4
2. Engines without compression release start feature. The combustion chambers and valves will be preserved as
specified in 1 above. EXCEPTION: Due to tendency of the engine to fire and run on the preservative lubricating oil, the crankshaft
will be rocked with the starting motor in lieu of continuous rotation. The engine will be tagged as specified in 1 above.
(c) Two cycle engines.
1. Engines with intake ports and valves. The fuel throttle will be completely closed. The air box covers on the side of
the engine opposite the blower will be removed. The exhaust manifolds and the rocker arm covers will be removed. The engine
crankshaft will be rotated with the starting motor until the piston in the cylinder to be sprayed is below the intake port. The spray
nozzle will be inserted into the open port. Maximum air pressure will not exceed approximately 25 psi. One-half of the determined
amount (a above) of P-10 preservative lubricating oil, type I or II, grade 10 will be sprayed into the open port. The preservation cycle
will be performed on each cylinder until all cylinders have been atomized sprayed with the preservative lubricating oil, after which the
crankshaft will not be rotated. With each exhaust valve manually depressed, the remaining one-half of the determined amount of
preservative lubricating oil, will be atomized sprayed through each open exhaust valve port. The interior of the air box covers will be
coated with preservative lubricating oil as specified. The air box covers will be reinstalled using new gaskets, if the ones originally
used show evidence of damage. The exhaust manifolds will be reinstalled using new gaskets, if the ones originally used show
evidence of damage. The rocker arm assemblies, springs, guides, valve stems, push rods and the inside of the rocker arm covers
will be atomized sprayed with preservative lubricating oil as specified. The rocker arm covers will be reinstalled using new gaskets, if
the ones originally used show evidence of damage. A tag will be prepared indicating: "ENGINE PRESERVED - DO NOT CRANK
UNTIL ISSUED TO THE USER". The tag will be attached near the engine start control.
2. Engines without valves. The fuel throttle will be completely closed. The exhaust manifolds will be removed. The
engine crankshaft will be rotated until the piston in the cylinder to be sprayed is below the exhaust port. The spray nozzle will be
inserted into the open exhaust port. Maximum air pressure will not exceed approximately 25 psi. One half of the determined amount
(a above) of P-10 preservative lubricating oil, type I or II, grade 10 will be atomized sprayed through the open exhaust port. The
crankshaft will be rotated until each cylinder has been sprayed through its open exhaust port. The preservation cycle will then be
repeated, after which the crankshaft will not be rotated. The exhaust manifolds will be reinstalled using new gaskets, if the ones
originally used show evidence of damage. A tag will be prepared indicating: "ENGINE PRESERVED - DO NOT CRANK UNTIL
ISSUED TO THE USER". The tag will be attached near the engine start control.
30. Air Cleaners.
a. Oil Bath Type. Oil bath type air cleaners will be filled to operating level with P10 preservative lubricating oil, type I or II, grade
30. Unpainted surfaces above operating level will be coated with the same type and grade of preservative.
b. Dry Type. After engine has been processed, when equipped with a dry type removable filtering element, the element will be
removed. The interior surfaces will be atomized sprayed with P-10 preservative lubricating oil, type I or II, grade 30. The metallic
elements will be dipped in the same type and grade preservative and the excess preservative allowed to drain prior to installation.
Element will be reinstalled. Caution will be exercised to prevent preservative from contacting nonmetallic surfaces and the felt of the
felt type elements.
31. Governors.
a. Hydraulic Type. Hydraulic systems will be filled to operating level with approved operating fluid.
b. Wet Type Mechanical. Prior to engine preservation, wet type mechanical governors having separate lubricating systems, will
be drained of operating lubricant and filled to operating level with P-10 preservative lubricating oil, type I or II, grade 30.
c. Dry Type Mechanical. Dry type governor mechanism, such as weights, springs, pins, linkage and other parts or assemblies
within the governor housing will be sprayed with P-10, preservative lubricating oil, type I or II, grade 30. Governor control linkage,
devices, and pins not inclosed within the governor housing will be coated with type P-2 preservative.
32. Reduction Gears.
a. Hydraulic Type. Prior to engine preservation, the hydraulic reduction gear systems will be inspected for proper fluid level and
contamination. Add approved fluid to bring to operating level, or if contaminated, drain and flush with operating fluid. Cleaned
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