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Test Receptacle Connector Terminals Identification
B. Operational Test Procedures
(1) Start the engine in accordance with instructions in 1-3; Para. 2, A thru C.
(2) Check operation of engine instruments: DC ammeter (17, Fig. 1), coolant temperature indicator
(21), oil pressure gage (23), and hourmeter (19).
(3) Check engine idle speed. Should be 825 to 875 RPM. Adjust, if necessary, in accordance with in-
structions in Engine Operator's Manual.
NOTE: A stroboscope is required for this check.
(4) Again check for oil, fuel, and coolant leaks and correct any leaking condition.
(5) Position switches and controls for automatic voltage regulation and power delivery as follows:
(a) Place automatic-manual switch (33, Fig. 1) in AUTOMATIC position.
(b) Place test-bank switch (34) in AIRCRAFT position.
(c) Meter switch (5) may be in any position except pointing straight down.
(d) If the adjustment of the voltage regulator rheostat (See TM-759/OM-2020) has been dis-
turbed, position the knob to mid-range position.
(6) Bring the engine up to governed speed and also energize the generator by holding the engine-gen-
erator control switch (18) in BUILD-UP-VOLTS position momentarily. Release switch and allow it to
position in "center" RUN position.
If the engine "comes-up" to governed speed and a voltage value appears on the voltmeter (2), the
electric governor and excitation deenergization relay circuits are functioning.
(7) Observe frequency meter (1). If engine speed is properly adjusted, frequency will be exactly 400
Hz. If not, adjust engine governed speed. See Fig. 8.
(8) Observe voltmeter (2). Use rheostat to adjust voltage to 115 V AC.
August 5/89 Revised
Figure 2
OM-2031
2-3
Page 5
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