ARMY TM 9-6115-639-13
AIR FORCE TO 35C2-3-386-51
MARINE CORPS TM 10155A-13/1
Table 4-4. Unit Level Troubleshooting (continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
17. FAN (B3) DOES NOT OPERATE AT HIGH TEMPERATURE
a. Check temperature switch S21 as follows (60 Hz model MEP 831A):
(1)
Connect positive (+) probe of multimeter to switch at S21-2.
(2)
Connect negative (-) probe to terminal board TB3, test point TP35.
(3)
Start generator set. Enclosure temperature must be above 100F.
(4)
120 } 2 VAC present?
If not present, remove and replace temperature switch (Para. 4-48).
b. Check temperature switch S21 as follows (400 Hz model MEP 832A):
(1)
Connect positive (+) probe of multimeter to switch S21-2.
(2)
Connect negative (-) probe to terminal board TB3, test point TP31.
(3)
Place START / RUN / STOP switch in RUN position. Enclosure temperature must be
above 100F.
(4)
20 to 32 VDC present?
If not present, remove and replace temperature switch (Para. 4-48).
c. Defective fan B3.
Remove and replace fan (Para. 4-48).
18. ENGINE EMITS WHITE SMOKE
a. Check engine oil level to see if it is too high.
If high, drain and service engine lubricating oil (Para. 4-1).
b. Check for contaminants in the oil system.
If contaminated, drain and service engine lubricating oil (Para. 4-1).
c. Check for clogged fuel filter / water separator element.
If clogged, remove and replace filter / separator element (Para. 4-49).
d. Adjust engine valve clearance in accordance with TM 9-2815-257-24.
e. Refer trouble to direct support level maintenance.
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