Table des Matières
Publicité
76
Chapitre Entretien
Liquides conseillés
REMARQUE
Do not mix types and brands of coolant.
Do not mix brands and types of SCAs.
Do not mix SCAs and Extenders.
Only use SCAs or Extender approved by coolant ma-
nufacturer and compatible with coolant.
Adding the SCA to Heavy-Duty Coolant
at the Initial Fill
Coolants conforming to ASTM D4985 and not
conforming D6210 require the addition of SCA at
initial fill.
Use the equation that is in Table 11 to determine the
amount of SCA that is required when the cooling
system is initially filled.
Tableau 11
Equation For Adding The SCA To The Heavy-Duty Coolant At
The Initial Fill
V × 0.07 = X
V is the total volume of the cooling system.
X is the amount of SCA that is required.
Table 12 is an example for using the equation that is
in Table 11 .
Tableau 12
Example Of The Equation For Adding The SCA To The Heavy-
Duty Coolant At The Initial Fill
Total Volume of the
Multiplication
Cooling System (V)
Factor
15 L (4 US gal)
× 0.07
Adding The SCA to The Heavy-Duty
Coolant For Maintenance
Heavy-duty antifreeze of all types REQUIRE periodic
additions of an SCA.
Test the antifreeze periodically for the concentration
of SCA. For the interval, refer to the Operation and
Maintenance Manual, "Maintenance Interval
Schedule" (Maintenance Section). Cooling System
Supplemental Coolant Additive (SCA) Test/Add.
Additions of SCA are based on the results of the test.
The size of the cooling system determines the
amount of SCA that is needed.
Use the equation that is in Table 13 to determine the
amount of SCA that is required, if necessary:
Tableau 13
V is the total volume of the cooling system.
X is the amount of SCA that is required.
Table 14 is an example for using the equation that is
in Table 13 .
Tableau 14
Example Of The Equation For Adding The SCA To The Heavy-
Total Volume of the
Cooling System (V)
Cleaning the System of Heavy-Duty
Antifreeze
Nota: Before corrosion inhibitors can be effective the
cooling system must be free from rust, scale and
deposits.
• Drain the cooling system.
• Before filling the cooling system with acceptable
Amount of SCA
that is Required
(X)
Most commercial cooling system cleaning agents are
corrosive and their use is not recommended by
1.05 L (35.5 oz)
Perkins.
The cooling system must be thoroughly flushed with
clean water after using cleaning agents.
Cleaning agents for marine or industrial cooling sys-
tem must not be used. These cleaning agents are ve-
ry aggressive and can cause damage to cooling
system components.
• Run the engine for approximately 30 minutes and
• Take a sample of the solution from the cooling
• Allow the sample to sit for at least 30 minutes and
• Flush the system with clean water.
Equation For Adding The SCA To The Heavy-Duty Coolant
For Maintenance
V × 0.023 = X
Duty Coolant For Maintenance
Multiplication
Factor
15 L (4 US gal)
× 0.023
quality water, pre-dissolve the cleaning agent in
the water. Use a non-foaming detergent to clean
oil contamination, consult your Perkins dealer for
suitable product.
REMARQUE
then leave the engine to cool down.
system, drain the system.
check for signs of oil and deposits. If oil and
deposits are still present, repeat the procedure.
M0105860-02
Amount of SCA
that is Required
(X)
0.35 L (11.7 oz)
Publicité
Table des Matières
