TM 9-2350-287-10STARTING MAIN ENGINE IN COLD WEATHER (continued)9.With brakes still locked, set throttle to run engine at 1200 rpm and shift transmission to fourth gear position. Whenengine coolant temperature gage indicates 120°F to 140°F, shift into neutral and idle engine. (If transmissiontemperature approaches 300°F during warm-up, immediately shift to neutral until temperature approaches normalrange.)10. During warm-up, refer to instrument panel checkout procedure (p. 2-88).STARTING THE APU IN EXTREMELY COLDWEATHERCAUTIONTo avoid damaging radio components, turn OFF all electrical and radio switches before startingthe APU.NOTE•Before you start the APU in extremely cold weather(0° to -65°F; -17.80C to -53.90C), refer to AppendixE to check:-Engine crankcase oil grade and level-Chaincase oil grade and level-Hydraulic oil grade and level•Change oil as necessary (see Appendix E).•When temperature is below -25°F (-31.7°C) outside, preheat APU compartment (p. 2-219) prior tostarting the APU.Starting When Temperature is 00° to -25°F (-17.8°C to -31.7°C)CAUTIONTo avoid excessive demand on batteries, do not crank engine longer than 1 minute at a time. Donot attempt to start the APU for longer than 5 minutes total. If the APU does not start in 5 minutes,notify Unit maintenance.2-215
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