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 TB 55-1900-231-15
L. Oil Purifiers and Filters. No preservation required. Leave primed and ready for service. New filters will be tied
to the equipment after activation and maintenance cycle.
M. Heat Exchangers: The raw water sides of heat exchangers shall be drained and blown dry with compressed air.
Drain plugs shall be reinstalled.
N. Refrigeration Units: No preservation required. Belts and pulleys shall be preserved IAW 3. E. above. Doors on
refrigerators inside the watercraft should be blocked and wired open.
O. Electrical Equipment:
(1) Rotating Electrical Equipments: Motor and generators can endure a lengthy period of exposure without
deterioration. No preservation is required. Ensure that sealed motors exposed to the elements are
properly sealed.
(2) Switch Boards, Panels, and Controllers: No preservation required. Tie doors on panels and controllers
located within the dehumidified area in an open position. Ensure that sealed controllers on the exterior,
exposed to the elements are properly sealed and protected with herculite covers.
(3) Receptacles: Non-watertight receptacles exposed to the elements will be sealed with glue and pressure
sensitive tape.
(4) Horns, Bells, Buzzers and Lights: All externally mounted horns, bells, buzzers and lights provided with
waterproof protection will remain in place. Units not provided with waterproof protection will be removed,
identified and stowed in the dehumidified area.
(5) Gauges and Instruments: No preservation required.
P. Sewage Collecting, Holding and Transfer (CHT) Systems:
(1) CHT Systems with Raw or Fresh Water Flush: Applicable to the Design 3006 Tugs and the Design
1466A LCU's. While the vessel's power systems are still operational (early on in the preservation
evolution) the system shall be operated IAW posted instructions, that is flushing and pumping the
collecting tank into the holding tank, then flushing the holding tank into a shore sewage receptacle leaving
both the collecting and holding tanks empty and ready for service. Pumps shall be preserved IAW 3. K.
(1) and (2).
(2) CHT Systems with Mineral Oil Flush Medium: Applicable to the Design 264B (Modified) cranes. While
the vessel's power systems are still operational, flush the commode with the oil pressure pump switch off to
relieve the system pressure. Pump the collecting tank into the holding tank. Pump the holding tank to a
shore sewage receptacle leaving both the collecting and holding tanks ready for service. The oil pressure
pump does not require preservation. Sewage pumps shall be preserved IAW 3. K. (1).
(1) Water Sides and Systems: Shall be drained and thoroughly dried with dry compressed air. Drain plugs
will be removed and lines disassembled sufficiently to effect complete draining of water. After drying,
reinstall plugs and reassemble lines to assure that the boiler is left in a ready for service condition.
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