8-5
Chapter 8 PERIODIC INSPECTION AND MAINTENANCE PROCEDURES
Damper - Inspect
Damper - Check Visually
Check the damper for oil leaks, scratches, deforma-
tions such as bulges of the cover (check with a scale
attached), and discoloration or peeling of paint due to
heat. Check carefully for bulges in the cover (use a
scale) and check for oil leaks from the shim, discolor-
ation and peeling of paint due to heat.
Note: If any defects are found in the damper, contact
your local dealer.
Fig. 8-3 Damper - Check Visually
Damper Temperature Control
To ensure the proper function of damper, heat must be dissipated from its surface to prevent excessive heating. Mit-
subishi Heavy Industries, Ltd. inspects each engine before shipment to make sure that the temperature of damper
does not excessively rise. However, the damper temperature varies depending on ambient conditions. Therefore,
make sure to provide sufficient ventilation for damper by following the instructions below.
1. Make sure the temperature of the damper outer surface does not exceed 90 °C [194 °F] when operating the en-
gine with rated power for an hour.
2. When installing a protective cover to damper, provide adequate ventilation so that the damper temperature re-
mains below 90 °C [194 °F].
3. We recommend the use of thermo label for temperature control.
The protective cover for the damper should not be
air-tight.
The damper deteriorates or slows down the perfor-
mance by heat, which may cause serious engine
problems.
Silicon oil
Cover
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