TM 9-2330-381-14
4-120. APU PREPARATION (CONT)
f. Remove rust and scale from exhaust pipe (6), manifold (7), and muffler (8) using a wire brush (item 16, appx. B).
Apply touch-up paint to chipped and scratched surfaces. Apply tape (item 13, table 4-1) to opening of exhaust
pipe (6) under rain cap.
g. Remove filler cap (9) and strainer element from fuel tank. Remove fuel supply line (10) at fuel filter (11) and drain
preservative oil from tank. Lightly spray interior of fuel tank with preservative oil (item 8, table 4-1). Reinstall
supply line (10).
h. Prepare tag (item 12, table 4-1): "THIS CRANKCASE FILLED TO OPERATING LEVEL WITH PRESERVATIVE
LUBRICATING OIL. GOOD FOR OPERATION UNTIL FIRST REQUIRED LUBRICANT CHANGE. DO NOT
DRAIN. CHECK OIL LEVEL. IF LOW, ELEVATE TO OPERATING LEVEL WITH OIL MIL-L-2104, GRADE
10W30." Attach tag to crankcase dipstick (12).
i. Prepare tag (item 12, table 4-1): "COOLING SYSTEM FILLED WITH WATER AND ANTIFREEZE SOLUTION IN
EQUAL PARTS BY VOLUME. DO NOT DRAIN. CHECK COOLANT LEVEL. IF LOW, ADD COOLANT OF
SAME MIXTURE." Attach tag to radiator neck (13).
j. Prepare tag (item 12, table 4-1): "FUEL SYSTEM PRESERVED WITH PRESERVATIVE OIL MIL-L-21260,
GRADE PE 10-1. DRAIN FUEL LINES BEFORE OPERATING. CHANGE FUEL FILTER AFTER 1 HOUR OF
OPERATION. NO FURTHER DEPROCESSING IS REQUIRED." Attach tag to fuel filter petcock (14).
k. Remove gooseneck step (15) to gain access to APU battery (para. 4-56).
l. Disconnect both battery terminals (para. 4-30). Apply preservative (item 9, table 4-1) to battery terminals. Use
tape (item 13, table 4-1) to secure battery cables (16) in place away from battery. Remove filler caps (17), place
pieces of barrier material (item 2, table 4-1) on top of filler holes, and then install filler caps.
m. Secure battery to APU frame with steel strapping (item 11, table 4-1) using cardboard cushion material (item 4,
n. Install step section (15) back on gooseneck and secure gooseneck steps over APU (para. 2-13).
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