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 TM 55-1925-204-12
Table 3-1. Operator/Crew Preventive Maintenance Checks and Services - Continued
Tug Diesel Large Design 3006
B - Before
A - After
M - Monthly
D - During
B/A - Biannually
Q - Quarterly
Intervals
Item
Item To Be
Procedure
Equipment Will Be Reported
No.
BDA
M Q B/A
Inspected
Not ready/Available If:
compressed air to clear chest of sea
growth and other foreign materials.
n. Pyrometer
The pyrometer is used to measure
engine load by temperature of
Flight II 3500F. Recommended
580 . Flight II 800oF. Maximum
F
600 . Flight II 900oF. Temperature
F
at or above 600 , must be
F
investigated, and the engine RPM
must be lowered until cause is
determined/rectified. Flight II vessels
temperature at or exceeding 900 .
F
o. Tachometer
Ensure the tachometer indicates
Tachometers are defective/
properly, and reflects engine
nonoperational.
revolutions. Check tachometer
with wheel house indicator for ac-
curacy, and equal readings.
p. Automatic alarm
Check that the panel box, delay
system
and alarm relay, terminal block,
electric horn and horn silencing
switches are properly mounted
and functioning correctly. Ensure
the lights function correctly by
exercising test switch. If lights
are out check circuit, bulbs and
fuses.
44
Shaft thrust bearing
Ensure bearing oil level is at
No oil evidenced in bear-
(Kingsbury)
prescribed level. Half the length
ing by sight glass check.
of the sight glass with shaft in
On Flight II vessels
motion. Check every two hours
engine oil pressure gauge.
with vessel underway.
45
Heat exchangers,
Ensure the piping is secured, cor-
Heat exchangers are
lubrication oil and
rectly assembled, securely
restricted impeding pro-
fresh water
mounted and not leaking. Inspect
per engine cooling.
heat exchangers for leaks at end
plates, and connections. Pull end
plates, check core and zinc plates
for dirt, clogging and corrosion.
Replace zinc plates if 50% or
more deterioration evidenced.
Use water lance to clean heat ex-
changer core, if necessary.
Change 1 3-8.9
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