TM 5-2420-231-10
0025
LEVEL A PREPARATION CONTINUED
c.
After completing engine processing, reconnect all fuel lines and install new filters.
d. Seal all engine air intakes. Annotate following deprocessing instructions on DA Form 2258: "MAIN
ENGINE PRESERVED WITH PRESERVATIVE OIL. DO NOT CRANK" and "BEFORE CRANKING,
REMOVE CAPS, TAPE, OR PLUGS FROM INTAKE EXHAUST, BREATHER OPENINGS, OIL
LEVEL DIPTICK TUBE, ETC."
11. Preservative Dye. Add oil soluble red dye conforming to MIL-D-81298 (WP 0029, Item 9) to preservative
oil to establish time periods and ensure coverage for engine preservation. The concentration of dye shall
be sufficient to impart marked coloring to oil. Prior to vehicle shipment/storage, flush out dye with
preservative oil.
12. Alternate Processing. Some manufacturers recommend use of Volatile Corrosion Inhibitor (VCI) to
prevent internal engine corrosion damage. Specify these special processing procedures in EPDS. VCI oil
should not be used full strength on non-ferrous metals where it will have direct prolonged contact. Follow
instructions as specified in the EPDS, MIL-PRF-21260, Type I, Grade PE-10 (WP 0029, Item 18) is the
normal preservative oil used in engine processing. Use of other oils, especially VCI oils, shall only be
used based on manufacturer's recommendations detailed in the EPDS.
CAUTION
Some VCI products have been known to promote corrosion of certain metals (e.g.,
brass, cadmium, copper, lead, magnesium, zinc, solder) and may also attack certain
organic materials (e.g., natural rubber). It is always a good idea to check with the
commercial vendor to ensure compatibility.
13. Preservation Through Dipstick Shroud Opening and Oil Filler Tube.
a. Spray six ounces of preservative oil (e.g., MIL-PRF-21260, Type I, Grade PE-10 (WP 0029, Item 18),
oil filler cap opening with atomizer.
b. Use an extension of sufficient length to permit spray nozzle to be within crankcase without being sub-
merged in the crankcase oil.
c.
After atomizer spraying has been accomplished, install dipstick, close oil filter cap, and seal all
openings to engine interior, including dipstick shroud opening and oil filler cap with tape conforming
to SAE-AMS-T-22085, type IV (WP 0029, Item 32).
14. Preservation Through Main Engine Exhaust Systems.
a. Spray two ounces of preservative oil (e.g., MIL-PRF-21260 (WP 0029, Item 18), MIL-PRF-46002
engine with atomizer.
b. Spray one ounce of specified preservative oil into turbocharger exhaust with atomizer.
c.
Seal openings with tape conforming to SAE-AMS-T-2085, type IV (WP 0029, Item 32).
d. Seal engine crankcase breathers with caps and plugs (WP 0029, Item 3) or with tape conforming to
SAE-AMS-T-22085, type IV (WP 0029, Item 32).
e. Seal opening of tailpipes, vertical and horizontal, with tape conforming to SAE-AMS-T-22085, Type IV
(WP 0029, Item 32).
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