TM 10-4520-259-13&P
Table 4-2. Unit Troubleshooting Procedure
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 2.
Determine if nuts securing smoke box cover and burner head assembly are torqued
properly.
Torque nuts in accordance with Appendix H.
12.
WATER TEMPERATURE GAGE INDICATES WATER OVERHEATING
Step 1.
Inspect 320-250°F (0-121° C) temperature control setting and determine if it is set too
high.
Adjust 320-250°F temperature control.
Step 2.
Inspect 32°-250°F temperature control for any defects.
Replace 320-250°F temperature control.
Step 3.
Determine if low water probe is defective.
Notify direct support maintenance if any defects are found.
13.
BLOWER AND FUEL PUMP MOTOR ARE NOISY
Step 1.
Inspect blower for any obstructions.
Remove obstructions.
Step 2.
Check for overheated blower.
a.
Loosen setscrew at fuel pump shaft and check blower rotation.
b.
If noise continues, replace blower.
c.
If noise ceases, replace fuel pump.
4-16
