TM 55-2815-574-24
FIELD MAINTENANCE
ENGINE
TROUBLESHOOTING PROCEDURES - FRESH WATER COOLING SYSTEM THERMOSTAT TESTING
INITIAL SETUP:
Tools and Special Tools
Personnel Required
General mechanic's tool kit
Engineer 88L
(WP 0179, Table 1, Item 97)
Chemical gloves (WP 0179, Table 1, Item 40)
Equipment Condition
Heater (WP 0179, Table 1, Item 48)
Fresh water cooling system thermostat removed
Industrial goggles (WP 0179, Table 1, Item 42)
Self-indicating thermometer
(WP 0179, Table 1, Item 95)
Utility apron (WP 0179, Table 1, Item 6)
Utility pail (WP 0179, Table 1, Item 61)
TROUBLESHOOTING PROCEDURE
TEST FRESH WATER COOLING SYSTEM THERMOSTAT
SYMPTOM
Erratic cooling system temperature.
MALFUNCTION
Thermostat out of temperature range.
CORRECTIVE ACTION
1.
Fill utility pail (Figure 1, Item 3) with water.
NOTE
Do not allow thermometer to touch bottom of utility pail.
2.
Place thermometer (Figure 1, Item 2) in utility pail (Figure 1, Item 3).
3.
Place thermostat (Figure 1, Item 1) in utility pail (Figure 1, Item 3).
4.
Place heating element (Figure 1, Item 4) in utility pail (Figure 1, Item 3).
5.
Turn on heating element (Figure 1, Item 4).
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