Table of Contents
Advertisement
SEBU8430-02
Illustration 37
Typical example
1. Remove the cooling system filler cap (1) or (2)
slowly in order to relieve pressure.
Illustration 38
Typical example
2. Maintain the coolant level within 25 mm (1.0 inch)
of the bottom of the filler cap.
3. 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
The crankshaft vibration damper limits the torsional
vibration of the crankshaft. The visconic damper has
a weight that is located inside a fluid filled case.
Damage to the crankshaft vibration damper or failure
of the damper can increase torsional vibrations. This
g01228685
can result in damage to the crankshaft and to other
engine components. A deteriorating damper can
cause excessive gear train noise at variable points in
the speed range.
A damper that gets hot could be due to excessive
torsional vibration. Monitor the temperature of the
damper during operation.
Note: If you use an infrared thermometer to monitor
the temperature of the damper, use the thermometer
during operation with similar loads and speeds. Keep
a record of the data. If the temperature begins to rise,
reduce the interval for inspecting the damper.
If the temperature of the damper reaches 100 °C
(212 °F), consult your Perkins dealer.
Inspect the damper for evidence of dents, cracks,
and leaks of the fluid.
If a fluid leak is found, replace the damper. The fluid
in the damper is silicone. Silicone has the following
characteristics: transparent, viscous, smooth and
sticky.
Inspect the damper and replace the damper for any
of the following reasons.
• The damper is dented, cracked, or leaking.
g01229602
• The paint on the damper is discolored from heat.
• The engine has had a failure because of a broken
crankshaft.
• There is a large amount of gear train wear that is
not caused by a lack of oil.
• The damper has been dropped.
Maintenance Section
Crankshaft Vibration Damper - Inspect
59
i02895011
Advertisement
Table of Contents
