TM-9-2350-247-20-1 Unit Maintenance Manual Volume 1 M548A1 M548A3 Tracked Cargo Carrier Download
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TM 9-2350-247-20-1 COOLANT HEATER MALFUNCTIONS—Continued 0086 00 5Y 1. Turn HEATER SWITCH ON. Do not stop at OFF position. 2. Does BLOWER stay ON? YES NO GO TO IY (PAGE 0086 00-9) 6Y 1. Run heater on HI for ten minutes 2. Feel exhaust temperature. Does heater continue to produce hot exhaust for ten minutes? YES NO GO TO JY (PAGE 0086 00-10) 7Y 1. Check to see if flame detector switch has been adjusted. 2. Has flame detector switch been adjusted? YES NO 7YN 1. Flame detector switch needs adjustment. 2. Notify your supervisor. 8Y 1. Faulty flame detector switch. 2. Notify your supervisor. BY 1. Remove indicator cover lens (1) and bulb (2). 2. Measure resistance between bulb center contact and base for continuity. 3. Does multimeter indicate any continuity? YES NO BYN 1. Replace indicator bulb (WP 0472 00). 2. Verify no faults found. 0086 00-2