Perkins 400 Series Operation And Maintenance Manual page 63

SEBU7992-05
1. Observe the coolant level in the coolant recovery
tank. Maintain the coolant level to "COLD FULL"
mark on the coolant recovery tank.
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.
2. Loosen filler cap slowly in order to relieve any
pressure. Remove the filler cap.
3. Pour the correct coolant mixture into the tank.
Refer to the Operation and Maintenance Manual,
"Refill Capacities and Recommendations" for
information on the correct mixture and type of
coolant. Refer to the Operation and Maintenance
Manual, "Refill Capacities and Recommendations"
for the cooling system capacity. Do not fill the
coolant recovery tank above "COLD FULL" mark.
Illustration 37
Filler cap
4. Clean filler cap and the receptacle. Reinstall the
filler cap and inspect the cooling system for leaks.
Note: The coolant will expand as the coolant heats
up during normal engine operation. The additional
volume will be forced into the coolant recovery tank
during engine operation. When the engine is stopped
and cool, the coolant will return to the engine.
Engines Without a Coolant
Recovery Tank
Check the coolant level when the engine is stopped
and cool.
Illustration 38
Cooling system filler cap
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. Remove the cooling system filler cap slowly in
order to relieve pressure.
2. Maintain the coolant level at the maximum mark
that is correct for your application. If the engine is
equipped with a sight glass, maintain the coolant
level to the correct level in the sight glass.
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3. Clean the cooling system filler cap and inspect the
gasket. If the gasket is damaged, discard the old
filler cap and install a new filler cap. If the gasket is
not damaged, use a suitable pressurizing pump in
order 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,
install a new filler cap.
Maintenance Section
Cooling System Coolant Level - Check
63
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