TM 55-2815-574-24
FIELD MAINTENANCE
ENGINE
TROUBLESHOOTING PROCEDURES - BELOW NORMAL READING ON ENGINE COOLANT
TEMPERATURE GAUGE
INITIAL SETUP:
Personnel Required
References (cont.)
Engineer 88L
TM 55-1925-205-23
References
TM 55-1925-205-10
NOTE
The following procedure is typical for both port and starboard engines.
Check oil pressure with the engine warmed up and a minimum water outlet
temperature of 160F (71C).
TROUBLESHOOTING PROCEDURE
BELOW NORMAL READING ON ENGINE COOLANT TEMPERATURE GAUGE
SYMPTOM
Diesel engine has below normal engine coolant operating temperature.
MALFUNCTION
Improper circulation.
CORRECTIVE ACTION
1.
Thermostat may not be closing. Remove, inspect, and test thermostat (WP 0025). Install new
thermostat if necessary (WP 0139).
2.
Perform operational check of diesel engine (TM 55-1925-205-10).
3.
Check for improperly installed heater. Re-install heater correctly (TM 55-1925-205-23).
4.
Perform operational check of diesel engine (TM 55-1925-205-10).
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