TP-6811 7/16 53Section 4 Cooling System
Section 4 Cooling System
4.1 General
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.
The generator set engine is water cooled. The cooling
system includes the radiator and cooling fans.
Components of the cooling system are shown in
Figure 4-3. Cooling fans are described in Section 4.10.
The closed-loop engine cooling system includes the
engine water pump, which circulates the cooling water,
and the engine thermostat which opens and closes the
cooling water flow to maintain a constant engine
temperature. Refer to the engine service manual for
thermostat and water pump service information.
Hot coolant and steam.
Can cause severe injury or death.
Before removing the pressure cap,
stop the generator set and allow it to
cool. Then loosen the pressure cap
to relieve pressure.
WARNING
Before servicing, allow the engine to cool. Release
pressure from the cooling system before removing the
pressure cap. To release pressure, cover the pressure
cap with a thick cloth and then slowly turn the cap
counterclockwise to the first stop. Remove the cap after
pressure has been completely released and the engine
has cooled. Check the coolant level at the overflow
bottle.
Note: Block heater damage. The block heater will fail
if the energized heater element is not immersed
in coolant. Fill the cooling system before turning
on the block heater. Run the engine until it is
warm and refill the radiator to purge the air from
the system before energizing the block heater.