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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:
may require throttling down the
S.W. overboard discharge to
maintain the engine coolant at
normal operating temperature
(130-135oF at heads). On Flight II
vessels 160-165 .
F
j. Startingair
The starting air pressure gauge
Low air pressure engine
pressure gauge
indicates the pressure of the star-
fails to turn over/start.
ting air available in the storage
flasks.
Air pressure readings in excess of
265 psi, and less than 125 psi,
should be investigated.
k. Lubricating oil
Ensure the gauge indicates properly.
Oil pressure is at or below
pressure gauge
If the gauge does not indicate, stop
10 psi.
the engine immediately, investigate
the cause and correct deficiency.
Normal operating pressure of engine
is 15 psi.
l. Fuel oil pressure
Indicates the pressure of the fuel
Extremely low/no fuel oil
gauge oil being delivered to the injection pressure indicated. Flight
pumps. Normal operating
II vessel 3500 psi.
pressure is 2-6 psi. Readings
below normal pressure indicate a
restriction/dirty fuel oil filters.
On Flight II vessels minimum
4000 psi maximum 7000 psi.
m. F.W. &S.W.
The F.W. pressure gauge in-
No pressure indicated at
pressure gauge
dicates the water pressure at the
pressure gauge. Defective
pump discharge. Engine
FW/SW pump.
temperature should increase
gradually during warm-up period.
In case of extremely high indication,
caused by defect in the cooling
system, engine should be slowed or
stopped immediately, and cause
investigated. Normal operating
pressure is 10-15 psi. S.W. pressure
fluctuates with engine RPM. A drop
in pressure indicates a restriction in
the S.W. side. Check S.W. strainer
for debris or foreign bodies. On
Flight II vessels 6-7 psi. Should
the strainer evidence no restric-
tion, back blow sea chest with
3-8.8
Change 1
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