TROUBLESHOOTING CHART (continued) - TM-9-2350-287-20-1

(9) TACHOMETER FAILS TO OPERATE WHEN ENGINE IS RUNNING

TROUBLESHOOTING CHART (continued) - TM-9-2350-287-20-1_182

TM-9-2350-287-20-1 Carrier Ammunition Tracked M992A21 (2350-01-352-3021) EIC:AE6 Manual
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TM 9-2350-287-20-1 2-19. TROUBLESHOOTING CHART (continued). g. GAGES (continued). (9) TACHOMETER FAILS TO OPERATE WHEN ENGINE IS RUNNING (continued). Replace tachometer (para 7-9). Verify problem is solved. WARNING B. A protective fan screen must be installed prior to doing main- tenance in the engine compartment, when the engine is running or engine is in ground hop mode. Contact with a rotating fan can cause injury. 1. Reconnect tachometer drive shaft to ta- chometer. 2. Install protective fan screens (para 2-8). 3. Disconnect tachometer drive shaft from ta- chometer drive on engine. 4. Have assistant hold fuel shutoff out and crank engine (refer to TM 9-2350-287-10). 5. Observe tachometer drive for rotation. Does tachometer drive rotate? GO TO STEP E C. 1. Connect tachometer drive shaft to tachom- eter drive on engine. 2. Disconnect tachometer drive shaft from bulk- head coupling. Continued on next page 2-129

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