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: When the cooling system is cleaned, only
clean water is needed when the ELC is drained and
replaced.
Note: Inspect the water pump and the water
temperature regulator after the cooling system has
been drained. This inspection can be a good
opportunity to replace the water pump, the water
temperature regulator, and the hoses, if necessary.
NOTICE
When any servicing or repair of the engine cooling
system is performed, the procedure must be per-
formed with the engine on level ground. Level ground
will allow you to check accurately the coolant level.
This check will also help in avoiding the risk of intro-
ducing an air lock into the coolant system.
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.
1. 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.
Illustration 48 g02513896
Typical example
2. Remove the drain plug (1) on the engine. Also,
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. 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, in order 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.
SEBU8726 89
Maintenance Recommendations
Coolant (ELC) - Change
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