MIL-DTL-62220C
8. After allowing the engine to cool, turn the three-position "engine preheat"
switch located on the main control panel to the preheat position and crank the
engine for 20 seconds to preserve main engine intake manifold heater.
9. Disconnect the preservative container and reconnect the fuel lines.
3.4.2.1.1.1 Preservation of turbochargers and combustion air intake.
CAUTION: For the next procedure, each cranking period shall not be less than
15 seconds or more than 25 seconds. Special precautions shall be taken to
assure that these time limits are kept, otherwise the engine starter or starter
solenoid may be damaged.
1. Shut off the fuel supply to the engine by pulling out the main engine manual
fuel shut-off handle.
2. Disassemble the air hose elbow from each turbocharger inlet (see Figure 4).
3. While the engine is cranked for 20 seconds, atomizer spray preservative/
lubricating oil conforming to MIL-L-21260, grade 10 into both turbocharger
inlets for the first five seconds of engine cranking. One ounce of preservative
shall be used. The engine may briefly fire during this cranking. Allow the
engine starter to cool for three minutes.
4. Repeat this procedure four more times for a total of five times.
5. Reinstall the hose to each turbocharger inlet. Push in the manual fuel shut-off
handle to allow fuel to flow to the engine.
6. Apply tape conforming to MIL-T-22085, type IV to the engine air intake
openings located externally near the top rear roof section.
7. The following deprocessing instruction shall be marked on DA Form 2258:
"MAIN ENGINE PRESERVED WITH PRESERVATIVE/LUBRICATING
OIL MIL-L-21260. DO NOT CRANK" and "BEFORE CRANKING,
REMOVE CAPS, TAPE, OR PLUGS FROM INTAKE, EXHAUST AND
BREATHER OPENINGS."
3.4.2.1.1.2 Preservation through dipstick shroud opening and oil filler tube. Six ounces
of preservative/lubricating oil conforming to MIL-L-21260, grade 30 shall be atomizer sprayed
into the crankcase through the oil filler cap opening. Use an extension of sufficient length to
permit the spray nozzle to be within the crankcase without being submerged in the crankcase oil.
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