TP-6953 7/19 105Section 6 Cooling System
6.3 Coolant Replacement Including
Heat Exchanger Service
Accidental starting.
Can cause severe injury or death.
Disconnect the battery cables before
working on the generator set.
Remove the negative (- ) lead first
when disconnecting the battery.
Reconnect the negative (- ) lead last
when reconnecting the battery.
WARNING
Disabling the generator set. Accidental starting can
cause severe injury or death. Before working on the
generator set or equipment connected to the set, disable the
generator set as follows: (1) Press the generator set off/reset
button to shut down the generator set. (2) Disconnect the
power to the battery charger, if equipped. (3) Remove the
battery cables, negative (- ) lead first. Reconnect the negative
(- ) lead last when reconnecting the battery. Follow these
precautions to prevent the starting of the generator set by the
remote start/stop switch.
At the interval specified in the Service Schedule, clean
the heat exchanger tube. In a closed cooling system,
seawater circulates through separate chambers within
the heat exchanger to cool the engine coolant. The
seawater then mixes with engine exhaust and ejects out
of the exhaust mixer’s outlet. See Section 1 for coolant
capacity, thermostat, and pressure cap ratings.
1. Press the generator set OFF/RESET button to shut
down the generator set.
2. Disconnect the power to the battery charger, if
equipped.
3. Disconnect the generator set engine starting
battery, negative (- ) lead first.
4. Disconnect the hose from the heat exchanger at
the location shown in Figure 6-3. Drain the
coolant.
1. Hose
1
Figure 6-3 Hose Location, Typical
5. Replace the hose and hose clamp.
6. Loosen the front cover screws of the heat
exchanger. See Figure 6-4 and Figure 6-5.
1. Heat exchanger’s front cover
1
Figure 6-4 Heat Exchanger Front Cover Location
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