Def Filler Screen - Clean; Crankshaft Vibration Damper - Inspect - Perkins 1206F-E70TTA Operation And Maintenance Instructional Manual

SEBU8732-05
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 proce-
dure will allow you to check accurately the coolant
level. This procedure will also help in avoiding the risk
of introducing an air lock into the coolant system.
1. Remove the cooling system filler cap slowly in
order to relieve pressure.
2. Maintain the coolant level at the maximum mark
that is correct for your application. If the engine is
equipped with a sight glass, maintain the coolant
level to the correct level in the sight glass.
Illustration 71
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.
Note: The Diesel Exhaust Fluid (DEF) tank requires
coolant flow around the tank. The Coolant Diverter
Valve (CDV) will turn the flow on or off. If the coolant
system has been filled with the CDV in the closed
position, coolant level will drop because of the
opening of the CDV. The coolant flow will be diverted
when the ambient temperature is approximately
−5° C (23° F).
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 72
g02590196
Typical example
Inspect the damper and replace the damper for any
of the following reasons:
• The damper is dented, cracked, or leaking.
For information on removal of the crankshaft damper,
refer to Disassembly and Assembly, "Vibration
Damper and Pulley - Remove and Install".

DEF Filler Screen - Clean

Ensure that the engine is stopped before any servic-
ing or repair is performed.
Maintenance Section

Crankshaft Vibration Damper - Inspect

NOTICE
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