Komatsu 830E-AC Shop Manual page 132

Radiator Filling Procedure
Cooling System is pressurized due to thermal
expansion of coolant. DO NOT remove radiator
cap while engine and coolant are hot. Severe
burns may result.
1. With engine and coolant at ambient tempera-
ture, remove radiator cap.
Note: If coolant is added using the Wiggins quick fill
system, the radiator cap MUST be removed prior to
adding coolant.
2. Fill radiator with proper coolant mixture (as
specified by the engine manufacturer) until
coolant is visible in the sight gauge.
3. Install radiator cap.
4. Run engine for 5 minutes, check coolant level.
5. If coolant is not visible in the sight gauge,
repeat steps 1 through 4. Any excess coolant
will be discharged through the vent hose after
the engine reaches normal operating tempera-
ture.
Engine coolant must always be visible in the
sight gauge before truck operation.
C3-8 Cooling System C03035