Table 4-3. Organizational Troubleshooting (Contd)
TEST OR INSPECTION
FREQUENCY FLUCTUATES OR DROPS UNDER LOAD
Check the governor adjustment or the engine power. Refer to TM 5-2805-259-14. or TO 38G2-89-41.
Correct the deficiency, refer to TM 5-2805-259-14, or TO 38G2-89-41.
ENGINE OIL PRESSURE NOT INDICATED ON GAGE
Inspect oil pressure gage for serviceability, loose or corroded wiring, metal to metal contact,
incorrect wiring and cracks or breaks in wiring. If any of the above deficiencies exist, correct them.
Tighten wires, replace wires, etc., if oil pressure gage is damaged, replace it. (Refer to
figure 4-61 or 4-62.) If none of those deficiencies exist go on to step 2.
Remove the top engine shroud, figure 4-41. Test the oil pressure gage transmitter with a
multimeter (paragraph 4-15) for continuity between terminals of the transmitter. inspect the
transmitter for cracks, breaks and loose terminals.
Replace defective transmitter, fig. 4-42. Install the top engine shroud, fig. 4-41. If
transmitter is not damaged, go on to step 3.
Check for a broken or cracked oil pressure indicator. Inspect for loose or corroded wiring and
incorrect wiring. Test with a multimeter. refer to paragraph 4-15.
Repair the wiring as necessary, or replace the indicator, refer to figures 461 or 4-62.
VOLTMETER INDICATION TOO HIGH OR TOO LOW.
Inspect voltmeter for loose wires, corroded wiring, incorrect wiring, and breaks and cracks. Also,
test the voltmeter with a multimeter to verify readings.
Test the voltage adjusting rheostat (variable resistor) by referring to para. 4-46c. If test renders the
rheostat defective, replace it. Refer to figure 4-61 or 4-62 to remove rheostat from the applicable
model generator set.
VOLTMETER FAILS TO REGISTER
Inspect the voltmeter for cracks or breaks. loose or corroded wiring, and incorrect wiring. Use a multimeter
(para 4-15) and test the voltmeter.
Tighten loose wiring and clean corroded wiring. If test shows meter to be defective,
4-48 Change 8