NOTICE
Failure to replace the water temperature regulator on
a regularly scheduled basis could cause severe en-
gine damage.
Perkins engines incorporate a shunt design cooling
system and require operating the engine with a water
temperature regulator installed.
If the water temperature regulator is installed incor-
rectly, the engine may overheat, causing cylinder
head damage. Ensure that the new water tempera-
ture regulator is installed in the original position. En-
sure that the water temperature regulator vent hole is
open.
Do not use liquid gasket material on the gasket or cyl-
inder head surface.
NOTICE
Care must be taken to ensure that fluids are con-
tained during performance of inspection, mainte-
nance, testing, adjusting, and repair of the product.
Be prepared to collect the fluid with suitable contain-
ers before opening any compartment or disassem-
bling any component containing fluids.
Dispose of all fluids according to local regulations
and mandates.
Note:
If replacing only the water temperature
regulator, only drain the coolant to a level that is
below the water temperature regulator housing.
Refer to Disassembly and Assembly, “Water
Temperature Regulator - Remove and Install” for the
replacement procedure.
i03644948
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.
Use a Coolant Conditioner Test Kit in order to check
the concentration of the SCA.
Add the SCA, If Necessary
NOTICE
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
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-
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.
NOTICE
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.
72
SEBU9074-01
Maintenance Section
Cooling System Supplemental Coolant Additive (SCA) - Test/Add