Perkins 1706EA-E93TA Operation And Maintenance Manual page 101

M0087475-06
Illustration 86
Typical filler cap gaskets
3. Clean the cooling system filler cap and check the
condition of the filler cap gaskets. Replace the
cooling system filler cap if the filler cap gaskets are
damaged. Reinstall the cooling system filler cap.
4. Inspect the cooling system for leaks.
Cooling System Supplemental
Coolant Additive (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 SCA Concentration
Heavy-Duty Coolant/Antifreeze and SCA
NOTICE
Do not exceed the recommended six percent supple-
mental coolant additive concentration.
Cooling System Supplemental Coolant Additive (SCA) - Test/Add
Use a Coolant Conditioner Test Kit in order to check
the concentration of the SCA.
Add the SCA, If Necessary
Do not exceed the recommended amount of supple-
mental 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 tempera-
ture components. Excessive supplemental coolant
additive concentration could also result in radiator
tube blockage, overheating, and/or accelerated water
g00103639
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 addi-
tives together could result in supplemental coolant
additive concentration exceeding the recommended
maximum.
Pressurized System: Hot coolant can cause seri-
i03644948
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.
When any servicing or repair of the engine cooling
system is performed the procedure must be per-
formed with the engine on level ground. This will al-
low 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. Add the correct amount of SCA. Refer to the
Operation and Maintenance Manual, "Refill
Capacities and Recommendations" for more
information on SCA requirements.
Maintenance Section
NOTICE
NOTICE
101