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Page Title:
ENGINE COOLANT HEATER TESTING - continued |
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 TM 9-2320-361-24-2
0426 00
ENGINE COOLANT HEATER TESTING (Contd)
RESTRICTION THERMOSTAT TEST
1.
Place switch (4) in START position.
2.
When indicator lamp (5) illuminates, place switch (4) in RUN position. Allow heater to run.
3.
Check temperature of coolant at thermometer (1). Temperature should be 140170 F (60.076.7 C).
Replace restriction thermostat if coolant temperature is not within limits (WP 0421 00).
4.
Place switch (4) in OFF position.
OVERHEAT SWITCH TEST
1.
Place switch (4) in START position.
2.
When indicator lamp (5) illuminates, place switch (4) in RUN position. Allow heater (8) to run.
3.
Partially restrict air inlet with a sheet of cardboard or sheet metal. Overheat switch (9) should
activate and shut down heater (8) within five minutes. Replace overheat switch (9) if heater (8)
does not shut down after five minutes (WP 0433 00).
4.
Check temperature of coolant at thermometer (1). Temperature should be 220250 F
(104.4121.1 C).
5.
Replace overheat switch (9) if coolant temperature is not within limits (WP 0433 00).
6.
Place switch (4) in OFF position.
TEST EQUIPMENT REMOVAL
WARNING
Allow time for heater to cool before removing from test
equipment. Failure to do so may result in injury to personnel or
damage to equipment.
1.
Disconnect lead (2) from 24-volt power source (3).
2.
Install guard (6) on heater (8) with four screws (7).
3.
Remove heater (8) from test equipment.
4.
Install engine coolant heater (WP 0357 00).
5.
Connect battery ground cable (WP 0126 00).
6.
Release parking brake and remove wheel chocks (TM 9-2320-361-10).
0426 00-8
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