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 TB 740-97-4
oil sides of oil coolers will be drained.
79. 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.
80. Electrical Equipment.
a. Rotating Electrical Equipment. Explosion proof motors and 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 P-10 preservative lubricating
oil, type I or II, grade 30.
b. Switchboards, Panels and Controllers. No preservation required.
c. Receptacles. Receptacles exposed to the weather will be sealed against entrance of water by applying waterproof pressure
sensitive tape between the receptacle 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 Floodlights. All external mounted, horns, bells, buzzers, navigational and floodlights
provided with a waterproof protection will remain mounted. Units not provided with waterproof protection will be removed, identified
and stowed in the dehumidified area. No preservation required.
81. 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. Lines
disassembled for draining will be reinstalled. Boilers will be left open to provide circulation of air.
82. Oil Burners. Pot and atomizing type oil burners will be drained, cleaned and dried.
83. 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. 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.
c. Other Valves within Compartments. Packing gland nuts will be loosened and the valves will be left in an open position.
84. Capstans, Winches and Windlasses. The above deck portions of capstans, winches and windlasses such as exposed gears
and pinions will be coated with type P-2 preservative. Gear boxes will be filled to operating level with P-10 preservative lubricating oil,
type I or II, grade 30. The gears will be turned to insure distribution of the preservative throughout the assembly. If turning of the
gears is not practical, the upper parts of the assembly will be preserved by atomized spraying with P-10, preservative lubricating oil,
type I or II, grade 30, or by completely filling the gear box with the preservative and draining to operating level. Brake bands and
drums will be preserved in accordance with paragraph 73. All exposed ferrous surfaces of shafts, linkages and threaded adjustment
will be coated with type P-1 preservative. Shelters will be constructed and placed over the entire units in a manner to protect from
entry of water but to permit ventilation. The shelters shall be painted as specified and shall incorporate the fabrication features as
specified herein. Drive units for capstans,
Change 2 4-16
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