Perkins 400 Series Operation And Maintenance Manual page 60

60
Maintenance Section
Cooling System Coolant (ELC) - Change
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.
3. 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" topic (Maintenance Section)
for more information on cooling system
specifications. Do not install the cooling system
filler cap.
4. Start and run the engine at low idle. Increase the
engine rpm to high idle. Run the engine at high
idle for one minute to purge the air from the
cavities of the engine block. Stop the engine.
5. 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.
6. Clean the cooling system filler cap. Inspect the
gasket that is on the cooling system filler cap. If
the gasket that is on the cooling system filler cap is
damaged, discard the old cooling system filler cap
and install a new cooling system filler cap. If the
gasket that is on the cooling system filler cap is not
damaged, use a suitable pressurizing pump to
pressure test the cooling system filler cap. The
correct pressure for the cooling system filler cap is
stamped on the face of the cooling system filler
cap. If the cooling system filler cap does not retain
the correct pressure, install a new cooling system
filler cap.
7. Start the engine. Inspect the cooling system for
leaks and for correct operating temperature.
Cooling System Coolant (ELC)
- Change
NOTICE
Care must be taken to ensure that fluids are con-
tained during performance of inspection, mainte-
nance, testing, adjusting and repair of the product.
Be prepared to collect the fluid with suitable contain-
ers before opening any compartment or disassem-
bling any component containing fluids.
Dispose of all fluids according to Local regulations
and mandates.
SEBU7992-05
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