TM-9-2350-277-20-1 Unit Maintenance Manual Volume 1 M113A3 M577A3 M1064A3 M1068A3 M58 Download
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TM 9-2350-277-20-1 PERSONNEL HEATER MALFUNCTIONS—Continued 0086 00 4Y 1. Turn HEATER SWITCH to ON. Do not stop at OFF position. 2. Do blower and pump stay on? YES NO 4YN 1. Replace heater ON/OFF/START switch. See task: Repair heater control box (WP 0702 00). 2. Verify no faults found. 5Y 1. Does heater continue producing hot air for 10 minutes? YES NO 5YN 1. Replace heater (WP 0703 00 or WP 0704 00). 2. Verify no faults found. 6Y 1. Listen to heater blower. 2. Turn HI/LO switch to HI. 3. Does blower speed increase? YES NO GO TO AY (PAGE 0086 00-3) 7Y 1. Feel heater hot air outlet. 2. Has air temperature increased? YES NO 7YN 1. Shut off heater (see your -10). 2. Replace heater (WP 0703 00) or (WP 0704 00). 3. Verify no faults found. 8Y NOTE Heater will automatically shut off when air inlet temperature is 60 degrees or above. This is normal. 1. Run heater on HI for 10 minutes. 2. Does heater continue producing hot air? YES NO 8YN 1. Shut off heater (see your -10). 2. Replace heater (WP 0703 00 or WP 0704 00). 3. Verify no faults found. 9Y 1. Turn HEATER SWITCH to OFF. 2. Does blower remain on? YES NO 9YN 1. Heater does not purge. 2. Replace heater (WP 0703 00) or (WP 0704 00). 3. Verify no faults found. 0086 00-2 Change 1