Coolant System Filling - Kohler 10CCOZ61 Service Manual

Coolant System Filling

The low-profile coolant system of the 10CCOZ-Mobile
generator set requires a coolant recovery system to
ensure that the cooling system remains full of coolant.
The system also requires that the unit be filled using
special precautions to ensure that it does, in fact, get
filled with fluid before the unit is placed into service. To
protect against operation with low coolant, the unit
includes a Low Coolant Level (LCL) switch.
Due to the configuration of the system and its extremely
low profile, it is necessary to fill the system with coolant
VERY SLOWLY to allow air to escape fully from the
radiator and the engine block. Once the coolant system
seems to be full, some air may still remain trapped in the
system. Often, when the unit has started and runs for
approximately 10-15 minutes after filling, a shutdown
will be experienced or the unit may continue to run but
will not start at the next attempt. If either of these
TP-5648 8/93
conditions occur, the shutdown may be due to low
coolant level in the radiator. As a remedy for this, add
one to two cups of coolant to the radiator. Be sure to
connect the coolant recovery tank to the system, as it is
an integral and required part of the cooling system.
Once the radiator is topped off, the coolant recovery
system will replace the last small amounts of air, which
remain trapped in the cooling system, with coolant.
Often a low coolant level or a low fuel level is overlooked
as possible causes for a shutdown. Any time a unit shuts
down, and no other cause can be found, check for a low
fuel or low coolant level condition. Remove the radiator
pressure cap from the engine very slowly. If the unit is
hot, it will release coolant into the recovery tank.
At scheduled maintenance intervals, check the coolant
while it is cold in the coolant recovery tank, as well as at
the pressure cap prior to starting the unit for its
maintenance. If it is not completely full, add coolant at
the recovery tank and the pressure cap to bring the level
to its appropriate mark.
Operation 2-5