TM-9-2350-311-10 M109 Operator's Manual for M109A2, M109A3, M109A4 and M109A5 Download

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TM 9-2350-311-10 2-10 OPERATING PROCEDURES — CONTINUED 2-10.1 Starting Procedures — Continued a. Starting Engine — Continued 5 6 7 8 Before starting engine, check for hydrostatic lock as indicated by engine starting to turn over with starter, then stopping or starter sounds as if straining when cranking engine. If hydrostatic lock is suspected, stop cranking immediately and notify unit maintenance. Check for hydrostatic lock by intermittently actuating STARTER control switch (7). Release FUEL SHUTOFF control assembly handle (6). Place hand throttle control lever (8) in IDLE position. If fuel filters have been drained, turn FUEL PRIME control switch (9) to ON, hold for 45 seconds, and then release. • Do not operate starter over 30 seconds (on M109A2 and M109A3 vehicles this must be timed). If engine does not start, allow two minute cooling-off period before trying to start again. Four start attempts should be made before combat override switch (M109A4/M109A5) is used or unit maintenance is notified. • Combat override switch (M109A4/M109A5) determined by section chief. Excessive use damage to starter or low battery voltage. NOTE should be used in emergencies only, as of combat override switch could result in • Refer to cold weather starting procedures when temperature is below 30° F (– 1° C) when using engine model 7083-7396 or 40° F (4° C) when using LHR engine model 7083-7391, or if engine will not start in moderately cold weather (para 2–20.4). 2-96