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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. Clean with hot
water and blow dry. Dip in
OE/HDO 30/40 oil and reinstall.
e. Expansion tank
Check coolant in engine, and heat
No coolant evidenced in
exchanger expansion tank 1/2
engine/operating at ex-
high in sight glass column. Dur-
cessive high tempera-
ing winter months when anti-
tures. Temperature ex-
freeze is used, make hydrometer
ceeds 140 . Flight II
F
vessels 170oF.
test, and add anti-freeze as local
conditions dictate. Normal
operating temperature is 135 .
F
o
On Flight II vessel 165 F.
f. Attached pumps
Inspect FW and SW. Pumps for
SW/FW pump is/are in-
proper operation and leakoff.
operative.
Normal leakage is 10-15 drops per
minute. Ensure pumps are pro-
perly vented.
g. Lubricating oil,
Check all standby pumps for
Salt water and fresh water
fresh water and
leaks and proper operation. Start
pressure exceeds 30 psi.
salt water stand-
all pumps and observe for vibra-
by pumps
tion, loose pump connections, and
faulty drive couplings.
Lube oil:
175 GPM 35 psi
Salt water:
300 GPM
25 psi
Fresh water: 580 GPM
15-20 psi
All should stay lined up (all perti-
nent valves open in system). Ex-
ception S.W. standy pump sea
chest suction should be closed
when pump is not in use.
h. Zinc anode
Check zinc pencils and discs on
engine salt water side; wire brush
zincs and check deterioration.
Should the zincs be more than
50% deteriorated, replace with
new zinc pencil or disc.
i. S.W. induction
The S.W. induction thermometer
thermometer
indicates the temperature of the
S.W. entering the heat exchanger.
When the thermometer indicates
50 or below, check the F.W.
F
temperature at the engine as it
Change 1
3-8.7
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