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TM 5-4210-220-12
Table 4-2 UNIT TROUBLESHOOTING - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
7a
LOSS OF COOLANT FROM RADIATOR SYSTEM - Continued
Step 6
Check winterization pump seal for leaks
Replace pump, (see para. 4-20)
Step 7
Check battery heater for leaks
Repair or replace heater, (see para. 4-20)
Step 8
With tanks empty, check water and foam tank heat exchangers for leaks.
Repair or replace heat exchanger (water tank) or whole tank (foam tank), (see para. 4-20)
Step 9
Check for water in engine oil. Tank a sample with engine running.
Refer to Direct Support
Step 10
Check for water in transmission oil
Refer to Direct Support
7b
OIL IN RADIATOR COOLANT
Sample radiator coolant and determine whether oil is from transmission or engine
Refer to Direct Support
7c
FAN AND SHUTTER WILL NOT OPERATE IN AUTO
Step 1
Check engine at working temperature (190 deg. F)
Allow engine to reach normal temperature
Step 2
Check air lines to multistat and to shutter and fan
Replace/repair connectors or hoses as required, (see para. 4-22)
Step 3
Check multistat for operation
Replace as required, (see para. 4-22)
4-36
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