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 TM 55-1925-204-12
Section III. TROUBLESHOOTING
(e) Cold weather operation requires special
3-3. General
precaution, due to tendency of personnel to restrict ventilation
a. When performing maintenance (troubleshooting)
for personnel comfort. Be sure ventilation blowers are
observe carefully for the following safety precautions:
operating and that air is freely circulating when hot water
(1)
When working around electrical equipment
boiler oil burner is in operations.
observe for the following:
(3)
During fueling or defueling operations, the
(a) Faulty electrical equipment constitutes
following safety precautions will be observed:
a hazard to the associated equipment and personnel.
(a) Inspect the fuel tank vents and make
(b) Do not attempt electrical repairs while
sure the flame arrestor screens are in place and free of
circuits are energized.
corrosion. (b) Do not permit smoking on the tug and within 50
(c) Danger tag the electrical controls or
feet of fueling connection, or greater distance if required by
switches while performing repairs to associated equipment; if
the local harbor regulations.
possible, remove fuses.
(c) Ground fueling nozzle to filling
(d) Do not attempt adjustments to the
connection with the grounding wire provided.
running generators.
(d) Have a member of the crew standing by
(e) Do not energize the electrical circuits if
with a 15 pound CO, extinguisher during the operation.
heavy water condensation is present.
(e) Close all ports in the vicinity of fueling
(f) Do not overload the circuits with
connections.
unauthorized appliances or electrical tools.
(f) Keep a close watch at all times so as
(g) Do not add to or supplement the
not to overflow tanks while fueling.
circuits.
(4)
Around batteries, observe for the following:
(h) Do not work on electrical apparatus
(a) Keep flame and sparks away from the
when hands or clothing are wet.
vicinity of batteries.
(i) When working within four feet of
(b) When using tools around batteries,
electrical equipment, do not wear any clothing with exposed
exercise care not to short circuit battery.
zippers, buttons or metal fasteners.
(c) Never open batteries unless the area is
(j) Personnel shall not wear loose or
ventilated.
flapping clothing in the vicinity of rotating equipment.
(d) Keep
the
battery
compartment
(k) Do not wear flammable articles such as
temperature below 95 ., if possible.
F
celluloid cap visors.
(e) Do not make repairs to battery circuits
(l) Personnel will remove rings, wrist
when the circuit is energized.
watches, bracelets or other metal items before performing
(f) Battery acid must be poured carefully.
work on or within four feet of electrical equipment with
Never pour water into acid. The acid must be poured slowly
exposed current-carrying parts.
and carefully into water. Guard eyes and skin from splashing
(m) Sparking electrical equipment is an
acid.
3xplosion and fire hazard. Stop the equipment, letermine the
(5)
Around compressed air, observe for the
cause and take corrective action.
following:
(2)
Around gaseous conditions observe for the
(a) Do not attempt repairs on air lines or
following:
associated equipment unless the air lines are turned off and
(a) Volatile gases being heavier than air
the air pressure is released.
tend to collect to the bottom of the hull. Accumulations of oil
(b) Do not "dust off" clothing with air hose.
fumes present an explosion hazard and must be prevented by
Flying particles can lodge in eyes.
ventilation.
(c) Do not under any circumstances use
(b) Battery gases (hydrogen) are explosive.
the propulsion engine air lines for any other purpose than
(c) Carbon monoxide is a deadly
what they were designed for.
poisonous gas, which is colorless and odorless. It is a by-
(d) Air tools must be connected properly
product of combustion in internal combustion engines. To
and inspected before using.
safeguard against personnel casualties from carbon
b. This section contains troubleshooting information for
monoxide, adequate ventilation must be provided in the
locating and correcting most of the operating troubles which
spaces where engines are running; exhaust silencers and
may develop in the tug
associated piping must be free from leaks.
(d) Ventilate the compartments thoroughly
for at least ten minutes to remove fumes before starting the
engines.
Change 1 3-9
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