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Several parts of a towboat’s engines, such as the exhaust
systems, mufflers and ductwork attached to the towboat’s engines,
the piping on the front and aft ends of the towboat’s engines,
and the towboat engines’ camshafts (including the camshaft gear
trains), crankshafts, and the drive gears (including the gear
boxes) attached to the engines are not included in the above-
described periodic procedures. This equipment is not inspected
as part of the procedures unless a specific operational problem
has been previously identified.
No part of a towboat’s main propulsion system other than its
main engines is affected as part of the above-described
procedures. In addition, none of the equipment located in the
wheelhouse, the upper deckhouse, the main deck, the upper engine
room, the deck stores area, the steering room, the fuel and
ballast areas, and the shaft alley is affected by the procedures.
None of the equipment located in the main engine room other than
the main engines is affected by the procedures. So for example,
the fire pump, the bilge and ballast pump, the deck wash pump,
the air compressors and tanks, etc., are not included in the
procedures.
The engines under consideration weigh 37,700 pounds and
measure almost 16 feet long, 5 feet wide and 9� feet high. They
are designed and constructed so that a power pack can be
regularly removed from the engine so that the procedures involved
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