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 Item No. 10 Interval Before Table 2-1. PREVENTIVE MAINTENANCE CHECKS AND SERVICES FOR M109 SELF-PROPELLED HOWITZER — CONTINUED Location Item to Check/ Service Driver’s Fixed And Portable Instrument Panels (LHR Engine Model 7083-7391) Crewmember Procedure DRIVER Check the following: a. b. c. MASTER switch indicator light (1) is lit when MASTER switch (2) is in ON position. MASTER WARNING indicator light (3) isn’t lit 15 seconds after engine starts. At temperatures above 50°F (10° C) the GLOW PLUGS indicator light (4) flashes light for one second when GLOW PLUGS switch (5) is turned to ON position. At temperatures below 50° F (10° C) the GLOW PLUGS indicator light (4) is lit for 35 seconds and flashes light for one minute when GLOW PLUGS switch (5) is turned to ON position. NOTE Depending on climatic conditions, it may take several minutes to obtain these readings. d. ENGINE OIL PRESSURE gage (6) reads 30 to 70 psi (207 to 483 kPa) at fast idle. e. ENGINE WATER TEMP gage (7) reads 170° F minimum, 230° F maximum. NOTE Not Fully Mission Capable If: Operation is to occur in tempera- ture below 40° F (5° C) and if GLOW PLUGS indicator light (4) remains lit. ENGINE WATER TEMP gage (7) or ENGINE OIL PRESSURE gage (6) is inop- erative or does not read within limits. 2-23