Perkins 904D-E28T Operation And Maintenance Manual page 68

68
Maintenance Section
Fluid Recommendations
NOTICE
Do not mix types and specifications of coolant.
Do not mix types and specifications of SCAs.
Do not mix SCAs and Extenders.
Only use SCAs or Extender approved by coolant
manufacturer and are compatible with coolant.
Perkins engine cooling systems should be tested at
250 hour intervals for the concentration of SCA.
Additions of SCA are based on the results of the test.
SCA that is liquid may be needed at 250 hour
intervals.
Adding the SCA to Heavy-Duty Coolant
at the Initial Fill
Use the equation that is in Table 12 to determine the
amount of SCA that is required when the cooling
system is initially filled.
Coolants that conform to "ASTM D4985" and do not
conform to "ASTM D6210" will require addition of
SCA at initial fill.
Table 12
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 13 is an example for using the equation that is
in Table 12 .
Table 13
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 SCA to the Commercial Heavy-
Duty Coolant for Maintenance
Heavy-duty antifreezes of all types require periodic
additions of SCA.
Test the antifreeze periodically for the concentration
of SCA.
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 14 to determine the
amount of SCA that is required, if necessary:
Table 14
Equation for Adding the SCA to the Commercial Heavy-Duty
V is the total volume of the cooling system.
X is the amount of SCA that is required.
Table 15 is an example for using the equation that is
in Table 14 .
Table 15
Example of the Equation for Adding the SCA to the Commer-
Total Volume of the
Cooling System (V)
Cleaning the System of Heavy-Duty
Antifreeze
Clean the cooling system for the following conditions.
• Clean the cooling system after used coolant is
• Clean the cooling system whenever the coolant is
• The cooling system must be free from rust, scale,
To clean the cooling system of heavy-duty antifreeze,
perform the following steps:
1. Drain the cooling system.
2. Fill the system with suitable distilled or deionized
Amount of SCA
that is Required
(X)
1.05 L (35.5 oz)
Most commercial cooling system cleaning agents are
corrosive and their use is not recommended by Per-
kins. If these cleaning agents have to be used to
clean heavy deposits, then they should not be left in
the system any longer then recommended by manu-
facturers. Also the engine temperature should not ex-
ceed 30° C (86° F).
The system must be thoroughly flushed with distilled
or deionized water after use of cleaning agents.
Coolant for Maintenance
V × 0.023 = X
cial Heavy-Duty Coolant for Maintenance
Multiplication
Factor
15 L (4 US gal) × 0.023
drained or before the cooling system is filled with
new coolant
contaminated or whenever the coolant is foaming
and any deposits, before corrosion inhibitors can
be effective
water.
NOTICE
M0108133-04
Amount of SCA
that is Required
(X)
0.35 L (11.7 oz)