Operation and maintenance manual

98 SEBU8601-01
Maintenance Section
Cooling System Supplemental Coolant Additive (SCA) - Test/Add
Pressurized System: Hot coolant can cause seri-
ous burns. To open the cooling system fille r 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 pres-
sure.
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.
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.
4. Inspect the cooling system for leaks.
i03644
948
Cooling System Supplem ental
Coolan
t Add itive (SCA) -
Test/Add
Cooling system coolant additive contains alkali.
To help prevent personal injury, avoid contact with
the skin and the eyes. Do not drink cooling system
coolant additive.
Test for S CA Concentration
Heavy-Duty Coolant/Antifreeze and SCA
NOTICE
Do
not exceed the recommended six percent supple-
mental coolant additive concentration.
Use a Coolant Conditioner Test Kit in order to check
t
he concentration of the SCA.
Add the SCA, If Necessary
NOTICE
Do not exceed the recommended amount of sup-
plemental coolant additive concentration. Excessive
supplemental coolant additive concentration can form
deposits on the higher temperature surfaces of the
cooling system, reducing the engine's heat transfer
characteristics. Reduced heat transfer could cause
cracking of the cylinder head and other high temper-
ature components. Excessive supplemental coolant
additive concentration could also result in radiator
tube blockage, overheating, and/or accelerated water
pump seal wear. Never use both liquid supplemental
coolant additive and the spin-on element (if equipped)
at the same time. The use of those additives together
could result in supplemental coolant additive concen-
tration exceeding the recommended maximum.
Pressurized System: Hot coolant can cause seri-
ous burns. To open the cooling system filler cap,
stop th
e engine and wait until the cooling system
components are cool. Loosen the cooling system
pressure cap slowly in order to relieve the pres-
sure.
NOTICE
When any servicing or repair of the engine cooling
system is performed the procedure must be performed
with the engine on level ground. This will allow you to
accurately check the coolant level. This will also help
in avoiding the risk of introducing an air lock into the
coolant system.
1. Slowly loosen the cooling system filler cap in
order to relieve the pressure. Remove the cooling
system filler cap.
Note: Always discard drained fluids according to
local regulations.
2. If necessary, drain some coolant from the cooling
system into a suitable container in order to allow
space for the extra SCA.
3. AddthecorrectamountofSCA.Refertothe
Operation and Maintenance Manual, “Refill
Capacities and Recommendations” for more
information on SCA requirements.