NOTICE
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened
component life.
Clean the cooling system and flush the cooling
system before the recommended maintenance
interval if the following conditions exist:
• The engine overheats frequently.
• Foaming of the coolant is observed.
• The oil has entered the cooling system and the
coolant is contaminated.
• The fuel has entered the cooling system and the
coolant is contaminated.
Note: Refer to Perkins Diesel Engines Fluids
Recommendations, Coolant Recommendations
(General Maintenance) for more information on the
service life of the recommended coolants.
Note: When the cooling system is cleaned, only
clean water is needed when the coolant is drained
and replaced.
Note: Inspect the water pumps and the water
temperature regulators after the cooling system has
been drained. This is a good opportunity to replace
the water pumps, the water temperature regulators
and the hoses, if necessary.
Drain
Pressurized System: Hot coolant can cause seri-
ous burns. To open the cooling system filler cap,
stop the engine and wait until the cooling system
components are cool. Loosen the cooling system
pressure cap slowly in order to relieve the
pressure.
Illustration 65 g07693467
Typical example
Illustration 66 g06258129
Typical example
1. Stop the engine and allow the engine to cool.
Isolate the electrical supply to the engine. Loosen
the cooling system filler cap (1) slowly to relieve
any pressure. Remove the cooling system filler
cap.
2. Clean the cooling system filler cap (1) and inspect
the seal (2). If the seal is damaged, discard the old
filler cap and install a new filler cap. If the seal is
not damaged, use a suitable pressurizing pump to
pressure test the filler cap. The correct pressure is
stamped on the face of the filler cap. If the filler
cap does not retain the correct pressure, replace
the filler cap.
3. Remove the drain plug (3) on the radiator.
M0163009 71
Maintenance Section
Cooling System Coolant - Change
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