TM 9-2350-277-20-2PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS), INCLUDINGLUBRICATION INSTRUCTIONS — Continued0155 00ITEMNO.INTERVALMAN-HOURITEM TO BECHECKED ORSERVICEDCREWMEMBERPROCEDUREEQUIPMENTNOT READY/AVAILABLEIF:61Semi-AnnualOperate Air BoxHeater Air PumpNOTEThe purpose of the item is to exercise thevanes in the air box heater air pump.a. Disconnect lead from fuel shutoff solenoid(WP 0205 00).b. To prevent engine from starting, pull fuel cutoffout (see your -10).CAUTIONAir pump can be damaged if switch is heldtoo long. Do not exceed a total of 20seconds of operation.c. Have helper crank engine and run air pump atthe same time intermittently for a total of 20seconds. Listen for air pump operation(see your -10).d. Connect lead to fuel shutoff solenoid.e. Lubricate air motor with OE/HDO every 150hours/1500 miles, semiannually or as required.0155 00-107
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