TM-9-2350-311-20-1 Maintenance Manual for Volume 1 M109 Hull Download
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TM 9-2350-311-20-1 2-15 PROCEDURES FOR SEMIANNUAL/ANNUAL SERVICES — CONTINUED ITEM NO. 28 TABLE 2-1 UNIT PMCS FOR M109A2/M109A3/M109A4/M109A5 HOWITZERS — CONTINUED INTERVAL Annual ITEM TO BE INSPECTED Starter Protection Relay — Continued PROCEDURE NOTE During normal operation when starter is cranking, starter protection device should automatically cut starter off after cranking for the following period of time: 25 to 35 seconds at 50°F (10°C) or above. 55 to 65 seconds at 0 to 50°F (-18 to 10°C). 100 to 140 seconds at 0 to -50°F (-18 to -45°C). Starter protection device should reset in 105 to 140 seconds. if starter does not shut off as indicated or device will not reset, replace device. c. If starter cranks for only 1 to 2 seconds, troubleshoot batteries for low power (para 3-3). d. If starter cranks longer than listed times, troubleshoot starter protection circuit (para 3-3). e. If starter cranks for listed times, wait 1 minute and try to engage again. If starter operates, troubleshoot starter protection circuit (para 3-3). CAUTION Combat override switch should be used only in an emergency or when tested as in this step. Excessive use may cause damage to starter. NOTE Combat override switch is found only on M109A4/M109A5 Howitzers. NOT FULLY MISSION CAPABLE IF: 2-38