1. Stop the engine and allow the engine to cool.
Loosen the cooling system filler cap slowly to
relieve any pressure. Remove the cooling system
filler cap.
Illustration 42 g01301065
Drain plug option
Illustration 43 g06518652
Drain tap option
2. Remove drain plug (1) or open drain tap (2) for the
engine.
3. Remove the drain plug or open the drain tap on the
radiator.
4. Allow the coolant to drain.
NOTICE
Dispose of used engine coolant or recycle. Various
methods have been proposed to reclaim used cool-
ant for reuse in engine cooling systems. The full distil-
lation procedure is the only method acceptable by
Perkins to reclaim the coolant.
For information regarding the disposal and the
recycling of used coolant, consult your Perkins dealer
or your Perkins distributor.
Flush
1. Flush the cooling system with clean water to
remove any debris.
2. Close the drain tap or install the drain plug to the
engine.
3. Close the drain tap or install the drain plug on the
radiator.
NOTICE
Do not fill the cooling system faster than 5 L
(1.3 US gal) per minute to avoid air locks.
Cooling system air locks may result in engine
damage.
4. Fill the cooling system with clean water. Install the
cooling system filler cap.
5. Start and run the engine at low idle until the
temperature reaches 49 to 66 °C (120 to 150 °F).
6. Stop the engine and allow the engine to cool.
Loosen the cooling system filler cap slowly to
relieve any pressure. Remove the cooling system
filler cap. Open the drain tap or remove the drain
plug on the engine. Open the drain tap or remove
the drain plug on the radiator. Allow the water to
drain. Flush the cooling system with clean water.
Fill
1. Close the drain tap or install the drain plug on the
engine.
2. Close the drain tap or install the drain plug on the
radiator.
NOTICE
Do not fill the cooling system faster than 5 L
(1.3 US gal) per minute to avoid air locks.
Cooling system air locks may result in engine
damage.
66
SEBU8311-09
Maintenance Section
Cooling System Coolant (Commercial Heavy-Duty) - Change
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