TM 9-2350-247-10OPERATE ENGINE COOLANT HEATER KIT (M548A1) 0040 00THIS WORK PACKAGE COVERS:Operation (page 0040 00-1).INITIAL SETUP:Maintenance LevelOperatorPersonnel RequiredDriverEquipment ConditionMASTER SWITCH ONOPERATIONNOTEThe engine coolant heater is a kit installed to prepare the carrier for extreme cold. The kit heatscoolant, and circulates the heater coolant through the engine and a heat exchanger plate in thebattery compartment. The kit is designed to operate safely while left alone for up to 12 hours.The engine coolant heater controls are on a control box mounted below the middle windshield.Two manual shutoff valves in the power plant compartment let you stop the flow of coolantthrough the engine coolant heater when it’s not running. Here’s how to turn it on:1. Make sure MASTER SWITCH is ON.2. Turn FUEL PUMP switch OFF.3. Do the During Preventive Maintenance Checks and Services (WP 0057 00).4. Open both coolant valves by turning valve handles counterclockwise as far as they’ll go. The coolant shutoff valve is atthe upper right front corner of the engine behind the secondary fuel filter. The coolant diverting valve is on the lower leftfront corner of the engine.0040 00-1
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