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 TB 740-97-4
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 lubrication
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 blocked open in
place with spacers 1/4 to 1/2 inch to permit circulation of dry air over the rocker arm mechanism. It wood or metal spacers dissimilar
to the block or cover are used, they will be insulated at point of contact with barrier material conforming to MIL-B-121, grade A tag will
be prepared indicating: "ENGINE PRESERVED-DO NOT CRANK UNTIL ISSUED TO USER". The tag will be attached near the
engines 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 shown 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.
65. Air Cleaners.
a. Oil Bath Type. Oil bath type air cleaners will be drained and fogged with type P-10, type I or II, grade 10 or 30 preservative
oil.
b. Dry Type Dry type air cleaners will be cleaned and dried. Contaminated non-metallic and felt type elements will be replaced.
66. 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 filled to operating level with P-10, preservative lubricating oil, type I or II, grade 30.
c. Dry Type Mechanical. No preservation required.
67. 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
systems will be filled to operating level with approved fluid and operated during the preservation cycle of the engine. Any exposed
exterior ferrous surfaces of the hydraulic systems will be coated with P-10 preservative lubricating oil type I or II, grade 30.
b. Mechanical Type. Mechanical reduction gears having separate lubricating systems will be inspected for level of lubricant
and for evidence of water and contamination of lubricant. Add lubricant specified by the applicable lubrication order to raise existing
lubricant to operating level or if contaminated, drain the lubricant, flush the gear housing with type P-3 preservative. Agitate with dry
compressed air and thoroughly drain. The cleaned gear case will be filled to operating level with approved lubricant and operated
under no load to insure coating of all interior surfaces and components. If impracticable to operate, agitate the lubricant with dry
compressed air sufficiently to insure coverage of gears and internal parts of the housing. The flexible tubing employed for air
agitation will be of a smaller diameter than the opening of the housing so that pressure will be released simultaneously with the
agitation process.
68. Inclosed Gears. Oil lubricated gears not otherwise provided for will be inspected for level or lubricant and for evidence of water
and contamination of lubricant. Add lubricant specified by the applicable lubrication order to raise existing lubricant to operating level
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