8 INSPECTION AND MAINTENANCE
Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL
132
Pub. No. 291Y1-40720 Revision: 5
â– Temperature Control with Thermo
Label
On the damper, a thermo label is attached as a
guide.
When the thermo label reaches the specified
temperature, the white heat-sensitive area turns
black.
Control and record the temperature regularly, and
check any abnormal temperature changes.
• Once the heat-sensitive area of the
thermo label turns its color, it will
never return to the original color again.
• A thermo label is attached as a guide. It
is recommended to measure the
temperature while operating the
engine with a non-contact
thermometer (thermo gun) and to
control and record it accordingly.
1 Make sure with a non-contact
thermometer (thermo gun) that the
surface of the engine is cooled down
so that you can touch.
2 Stick a thermo label (1) onto the
outer face of the damper.
• Avoid the stamped marking.
Fig. 8-14 Thermo Label - Stick
3 Operate the engine at the rated load
for about an hour.
4 Operate the stop switch "
Starting
and Stopping Devices Installed
during Manufacturing the Generator"
(→ Page 86) of the generator to turn
off the engine.
5 Check the heat-sensitive area of the
thermo label and record the highest
temperature.
ï‚®If a temperature rise is observed, locate the
defect in the engine or other causes. In
addition, replace the thermo label with a
new one and check the change of
temperature again.
• If the detected temperature comes
close to the limit temperature of the
damper, or if there is any abnormal
change in temperature, contact your
MHIET dealer "
CONTACT LIST" (→
Page 10).
• For the temperature limit of the
damper, refer to "Table8-4
Limit
Temperature of Damper" (→ Page
131).
(1)
Table 8-5 Types of Thermo Labels
Part name
Measurable tempera-
ture range (°C)
Thermo label 100-120 100 to 120
Thermo label 75-95 75 to 95
Thermo label 50-70 50 to 70
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