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 Change 3 2–54.3 Table 2–1. PREVENTIVE MAINTENANCE CHECKS AND SERVICES FOR M109 SELF-PROPELLED HOWITZER — CONTINUED Location Item No. Not Fully Mission Capable If: Crewmember Procedure Item to Check/ Service Interval 34.2 During Driver’s Fixed And Portable Instrument Panels (LHR Engine Model 7083–7391) DRIVER Check the following: a. MASTER switch indicator light (1) is lit when MASTER switch (2) is in ON position. b. MASTER WARNING indicator light (3) is not lit 15 seconds after engine starts. c. 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. Operation is to occur in tempera- ture below 40° F (5° C) and if GLOW PLUGS indicator light (4) remains lit. NOTE Depending on climatic conditions, it may take several minutes to obtain these readings. d. ENGINE OIL PRESSURE gage (6) reads: mini- mum of 5 psi (34 kPa) at idle (650 RPM) 30-50 psi (207-345 kPa) at 1800 RPM. ENGINE WATER TEMP gage (7) or ENGINE OIL PRESSURE e. ENGINE WATER TEMP gage (7) reads 170° F minimum, 230° F maximum. gage (6) is inop- erative or does not read within limits. 1 3 5 4 7 6 2 NOTE M109A4/M109A5 configuration shown.