TM 9-2350-287-20-1
2-19. TROUBLESHOOTING CHART (continued).
g. GAGES (continued).
(9) TACHOMETER FAILS TO OPERATE WHEN
ENGINE IS RUNNING (continued).
C. 3. Have assistant hold fuel shutoff out. Crank
engine (refer to TM 9-2350-287-10).
4. Observe tachometer flexible drive shaft for
rotation.
Does tachometer flexible drive shaft rotate?
Replace tachometer drive shaft from
tachometer drive to bulkhead coupling (para
20-2).
D. 1. Connect tachometer drive shaft to bulkhead
coupling.
2. Disconnect tachometer drive shaft from pulse
tachometer.
3. Have assistant hold fuel shutoff out. Crank
engine (refer to TM 9-2350-287-1 O).
4. Observe pulse tachometer for rotation.
Does pulse tachometer rotate?
Replace pulse tachometer (para 20-2).
Verify problem is solved.
Replace tachometer drive shaft from pulse
tachometer to tachometer (para 20-2).
Verify problem is solved.
END OF TASK
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