Table 9-3. Preventive Maintenance Checks and Services for Electrical Power Systems(Continued)
B - Before
D - During
A - After
H - Hourly Interval
CHECK FOR AND HAVE
IS NOT READY/
REPAIRED OR ADJUSTED
B D A
When coolant is at proper level and
level stabilizes, replace radiator cap.
n. Check tubes in heat exchanger expan-
sion tank for scaling.
If obstructed or scaled, clean tubes by
passing a rod slightly smaller than the
internal tube bore thru the tubes. Do
not use excessive force.
If expansion tank tubes are so
clogged that a rod cannot be passed
thru them, completely remove the
core and clean by boiling in a caustic
soda solution or with a commercial
cooling system cleaner.
Reassemble the heat exchanger and
o. Remove red tag from generator switch-
a. Service primary and final fuel filters by
performing the following:
Redtag affected SSG on switchboard
panel indicating, "WARNING-DO
NOT ACTIVATE. REPAIRS BEING
Shut off fuel tank supply valve on
Loosen nut on top center of primary
filter body. Lower filter case.
Remove filter element. Wash both ele-
ment and filter case in clean, non-
Reinstall element in reverse order.
Remove and discard final filter ele-
ment by turning from left to right
(right- hand thread).
Remove all old gasket material. Clean
gasket sealing surface in filter mount.