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 TM 55-1905-223-24-3
Table 2-2. Troubleshooting-Cont
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
STEP 6.
Check for poor quality fuel.
Check, clean, drain and replace.
38. Engine operates below idle speed in idle.
STEP 1.
Check if "Idle" is not adjusted correctly.
Adjust idle.
STEP 2.
Check if throttle is not opening. Check for defective actuator.
Replace fuel pump (para. 2-37).
39. Engine operates at high idle in idle.
STEP 1.
Check if no voltage is going to the governor control.
Check wiring connections on the governor control. Check for voltage to the control (para. 2-26).
STEP 2.
Check if magnetic pickup voltage is below 1.5 Vac when operating engine.
Check for loose terminals at the governor control (para. 2-26).
STEP 3.
Check for EFC or governor control failure.
Replace EFC or governor control (para. 2-26).
40. No voltage output from generator.
STEP 1.
Check for broken or loose leads.
n
Secure leads.
41. Generator voltage too low.
STEP 1.
Check for defective panel voltmeter.
Replace the voltmeter (para. 2-26).
STEP 2.
Check for low RPM.
Adjust "Idle" and "Run" potentiometer (para. 2-10).
STEP 3.
Check if fuel line is restricted.
Refer to Malfunction 17, Step 4.
STEP 4.
Check for defective voltage regulator.
a.
Operate engine at rated speed.
b.
Turn voltage adjust rheostat on the AVR from maximum to minimum volts. (AVR is operating if the
generator output voltage changes.)
c.
Replace regulator (para. 2-23), as necessary.
2-48
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