Preventive Maintenance Checks and Services for Electrical Power Systems (Continued)
CHECK FOR AND HAVE
IS NOT READY/
REPAIRED OR ADJUSTED
B D A D
b. Drain and clean fuel tank.
c. Remove red tag from switchboard con-
Notify Direct Support maintenance to per-
form the following maintenance:
Every 800 hours of operation.
a. Check and service the heat exchange
system for corrosion and scaling.
b. Redtag auxiliary generator switchboard
control panel indicating. "WARNING - DO
NOT ACTIVATE - REPAIRS BEING
c. Perform check of seawater pump
impeller as follows:
1) The rubber impeller type water pump
is used for raw water circulation. It
should never be run in a dry condition
(impeller blades will tear). If the engine
is not to be operated for any length of
time, it will be necessary to pack the
water pump with MARFAK 2HD
grease. (If this is not available, glycer-
ine may be used.) This is effected by
removing the pump end plate to give
access to the interior of the pump.
Insert the grease, or glycerine, thru
the top-most pipe connection (after
removing the rubber hose). Turn the
engine over to spread the lubricant.
This treatment is usually effective for
about 3 months and should be
repeated if stored for a longer period
2) A heat exchanger usually consists of
a casing with a core (tube stack),
which is the actual heat exchanger.
The oil cooler usually has a smaller
core and is sometimes an integral part
of the engine heat exchanger.