Perkins 1206E-E70TTA Operation And Maintenance Manual page 103

SEBU8601-04
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.
3. Add the correct amount of SCA. Refer to the
Operation and Maintenance Manual, "Refill
Capacities and Recommendations" for more
information on SCA requirements.
Crankshaft Vibration Damper - Inspect
4. 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.
Crankshaft Vibration Damper -
Inspect
Viscous Damper
The viscous damper has a inertia weight that is
located inside a fluid filled case. The inertia weight
moves in the case in order to limit torsional vibration.
Visually inspect the crankshaft damper. Ensure that
the cooling fins (1) on the crankshaft damper are
clean and free from dirt.
Illustration 58
Typical example
Inspect the damper and replace the damper for any
of the following reasons:
• The damper is dented, cracked, or leaking.
103
Maintenance Section
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