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58
Maintenance Section
Cooling System Coolant - Change
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.
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 Extended Life
Coolant (ELC). 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.
3. Start and run the engine at low idle. Increase the
engine rpm to high idle. Run the engine at high
idle for one minute in order to purge the air from
the cavities of the engine block. 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.
5. 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
in order 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.
6. Start the engine. Inspect the cooling system for
leaks and for correct operating temperature.
This document is printed from SPI². Not for Resale.
NOTICE
Cooling System Coolant -
Change
Illustration 30
Drain plug
NOTICE
Do not drain the coolant while the engine is still hot and
the system is under pressure because dangerous hot
coolant can be discharged.
Note: The radiator may not have been provided by
Perkins. The following is a general procedure for
changing the coolant. Refer to the OEM information
for the correct procedure.
1. Ensure that the vehicle is on level ground.
2. Remove the filler cap of the cooling system.
3. Remove the drain plug (1) from the side of the
cylinder block in order to drain the engine. Ensure
that the drain hole is not restricted.
4. Open the radiator drain tap or remove the drain
plug at the bottom of the radiator in order to
drain the radiator. If the radiator does not have a
radiator drain tap or a drain plug, disconnect the
hose at the bottom of the radiator.
5. Flush the coolant system with clean water.
6. Install the drain plugs and close the radiator drain
tap. Install the radiator hose if the radiator hose
was previously removed.
7. Fill the system with an approved antifreeze
mixture. The maximum flow rate is 1 L
(0.2200 Imp gal) per minute in order to fill the
system. Install the filler cap.
8. Run the engine and check for coolant leaks.
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