Table C-1. Preventive Maintenance Checks and Services for Electrical Power Systems (Continued)
B - Before
D - During
A - After
H - Hourly Interval
Item to be
Check for and have repaired
or adjusted as necessary
Check zinc anode module on right side of
heat exchanger (Figure 3-20). Unscrew
plug. Remove anode and compare to
new anode. If 50 percent or more has
been consumed, replace anode.
Remove red tag from SSG switchboard
m. Drain, flush it necessary, and refill cooling
1) Remove coolant filler cap and engine
block drain plug between oil filter and
power end of block Also remove
drain plug from coolant interchange
tank Allow coolant to drain to bilge.
When operation is completed, pump
2) Clean drain plug and install.
3) Check filler cap gasket. If damaged,
obtain new cap or install new gasket
4) Fill coolant system slowly with 5 gal of
clean fresh water.
5) Drain fresh water from cooling system
and check for impurities and discol-
oration. 11 water is dean, install drain
plug and proceed. If water is exces-
sively dirty or cloudy, flush using the
(a) Remove engine block and radiator
drain plugs to completely drain
(b) Install drain plugs. Fill system with
a commercially available cleaning
solution or 1 kg (2 lb) Sodium
Bisulfate (NaHSO4) per 40 L (10
US gal.) water.
(c) Start and run for 112 hour. Stop
engine and drain cleaning solution.
(d) Flush system with clean water
until draining water is dean. Do
not run engine while flushing.