8 INSPECTION AND MAINTENANCE
Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL
131
Pub. No. 291Y1-40720 Revision: 5
Damper - Check
• For the location of the dampers, refer
to "2
ENGINE - OUTLINE" (→ Page 75).
1 Check the external appearance of
the damper for the items below:
• Oil leak from the cauking
•Flaw
• Deformation such as bulge of the cover
(by applying a scale on it)
• Paint discoloring with heat
• Peeling
Fig. 8-13 Damper - Check
• If the damper is defective, contact your
MHIET dealer "
CONTACT LIST" (→
Page 10).
Damper Temperature - Check
To ensure the proper function of damper, heat must
be dissipated from its surface to prevent excessive
heating.
Be sure to obey the instructions below:
• Make sure the temperature of the damper
outside surface does not exceed the temperature
described in the following table when operating
the engine at the rated power output.
• When installing a protective cover to the damper,
provide adequate ventilation so that the damper
temperature does not exceed the temperature
listed in the table below.
Install a protective cover which can
dissipate heat.
* Otherwise, deteriorated damper due to poor
heat dissipation and ventilation in an enclosed
condition may cause breakage of the
crankshaft.
Table 8-4 Limit Temperature of Damper
Type of damper Continuous
use engine
Emergency use
engine
Viscous damper 90°C [194°F] 100°C [212°F]
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