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 TB 740-97-4
43. Heat Exchanger. Raw water sides will be flushed with clean fresh water, dried and flushed with type P-3 preservative. All
excess preservative will be drained. Potable or domestic water sides will be drained, flushed and thoroughly dried. No preservation
will be applied to the potable or domestic water sides of the exchangers but they will remain open as much as feasible to permit
ventilation. When possible, end covers will be stowed in the off set position. Surfaces normally in contact with oil, such as oil sides
of oil cooler, will be flushed with P10 preservative lubricating oil, type I or II, grade 30. All excess preservative will be drained.
44. Refrigerating Units. Refrigerant will be pumped into reservoirs, leaving sufficient pressure in the system to prevent the entry of
air. Sealed systems will not be disturbed. No preservation will be applied to the interior surfaces of refrigerant systems including
refrigerant compressor. Interior compartments of walk-in coolers, reefer sections, and cold storage compartments will not be cleaned
or preserved with any toxic type preservatives. Unprotected, bare ferrous metal surfaces, requiring a contactpreservative, will be
coated with Type P-14 preservative conforming to MIL-P-116, or Phenolic primer conforming to MIL-P-12742, Type I. Wood surfaces
within the cooler or cold storage compartments, requiring a preservative, will be coated with Phenolic primer conforming to MIL-P-
12742, Type II. The compressor crankcase will be filled to operating level with approved operating lubricant. All bare exterior ferrous
metal surfaces of the compressor will be coated with P-10 preservative lubricating oil, Type I or II grade 30.
45. Electrical Equipment.
a. Rotating Electrical Equipment. Explosion-proof motors and generators specially constructed for marine use, can endure a
lengthy exposure to humidity without deterioration. Ferrous metal slip rings will be coated with type P-11 preservative.
b Switchboards, Panels, and Controllers. Switchboards, panels and controllers will be cleaned using the most applicable
process of MIL-P-116. Ferrous metal bus bars and other ferrous surfaces, not requiring removal or preservatives for activation, will
be coated with petrolatum. Petrolatum will not be applied to contact surfaces of switches, points or terminals Switchboards and
panels will be ventilated.
c. Receptacles. Receptacles exposed to the weather will be sealed against entrance of water by applying water-proof pressure-
sensitive tape between the receptacles and its cover. Receptacles in compartments will not be sealed.
d. Gages and Instruments. Gages and instruments will be cleaned using the most applicable process of MIL-P-116. No
preservative materials will be applied to gages and instruments.
e. Horns, Bells, Buzzers, Navigational and Flood Lights. All external mounted horns, bells, buzzers, navigational and flood
lights, provided with waterproof protection will be removed, packaged in accordance with the most applicable method of MIL-P-116,
identified, and stowed within compartments. Bare exterior ferrous surfaces of removed or mounted units will be coated with type P-1
preservative.
46. Heating Boilers. The hot water heating boilers will be cleaned and thoroughly dried with dry compressed air. Drain plugs will be
removed and lines disassembled sufficiently to effect complete draining of water. Fire sides of boilers will be cleaned and coated with
type P10 preservative lubricating oil, type I or II, grade 30. Lines disassembled for draining will be reinstalled.
47. Oil Burners.
a. Pot Type. The fuel supply line will be disconnected and the carburetor will be flushed with type P-9 preservative. The
interior ferrous surfaces of the burner pot will be sprayed with P-10 preservative lubricating oil, type I or II, grade 30. Fuel lines will be
reinstalled.
b. Atomizing Type. The fuel system, from the suction side of the fuel pump, and the atomizing air system, from the atomizing
shutoff valve, will be filled with type P-9 preservative and drained. The atomizer will be removed from the burner, disassembled,
cleaned and coated with P-10 preservative lubricating oil, type I or II, grade 30. The atomizer will then be reassembled and
reinstalled.
48. Valves.
a. Weather Exposed Valves. Weather exposed valves will be turned to full open position, the stems will be coated with type P-
2 preservative, and the valves will then be closed. Unpainted ferrous metal surfaces remaining exposed will be coated with type P-1
preservative.
b. Sea Valves and Overboard Discharge Valves. Sea valves and overboard discharge valves will be secured in a closed
position with wire to prevent accidental opening. Sea strainer baskets will be cleaned and coated with type P-3 preservative. The
baskets will be left in place and strainer covers left in a closed position on wet stored vessels and in an open position on dry stored
vessels.
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