Illustration 35
g03349949
2.
Open the drain cock or remove the drain plug (1)
on the engine. Open the drain cock or remove the
drain plug on the radiator.
Allow the coolant to drain.
NOTICE
Dispose of used engine coolant or recycle. Various
methods have been proposed to reclaim used coolant
for reuse in engine cooling systems. The full distilla-
tion procedure is the only method acceptable by Per-
kins 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 in order
to remove any debris.
2.
Close the drain cock or install the drain plug in the
engine. Close the drain cock 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.
3.
Fill the cooling system with clean water. Install the
cooling system filler cap.
4.
Start and run the engine at low idle until the
temperature reaches 49 to 66 °C (120 to 150 °F).
5.
Stop the engine and allow the engine to cool.
Loosen the cooling system filler cap slowly in order
to relieve any pressure. Remove the cooling
system filler cap. Open the drain cock or remove
the drain plug on the engine. Open the drain cock
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 cock or install the drain plug on the
engine. Close the drain cock 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.
2.
Fill the cooling system with Commercial Heavy-
Duty Coolant. Add Supplemental Coolant Additive
to the coolant. For the correct amount, refer to the
Operation and Maintenance Manual, “Fluid
Recommendations” for more information on
cooling system specifications. Do not install the
cooling system filler cap.
3.
Start and run the engine at low idle. Increase the
engine rpm to high idle. Run the engine at high idle
for 1 minute in order to purge the air from the
cavities of the engine block. Decrease the engine
speed to low idle. Stop the engine.
4.
Check the coolant level. Maintain the coolant level
within 13 mm (0.5 inch) below the bottom of the
pipe for filling. Maintain the coolant level in the
expansion bottle (if equipped) at the correct level.
72
SEBU8731
Maintenance Recommendations
Coolant (Commercial Heavy-Duty) - Change
