TM 9-4120-405-13&P
(a) When starting generator-set with a dry fuel system or after a filter drain or change:
1. Make sure the vent on the underside of the fuel filler cap is open.
2. To prime fuel lines, slightly open one drain cock on filter item nearest to check valve.
3. The slowing of pump action Indicates the fuel system is primed.
4. When pump slows down, close drain cock and move master switch to START.
5. Push in the DC circuit breaker.
(b) Move master switch to PREHEAT position and hold for one minute.
NOTE
Preheat is not required when engine is warm.
(c) Place master switch in START position and hold until engine comes to operating speed. If engine
does not start within 15 seconds, repeat steps (b) and (c). If engine cranks too slowly utilize slave receptacle (J14) for
extra cranking power.
NOTE
If engine does not come to operating speed within 15 seconds, a minimum of 30
seconds cooling period must be observed before attempting another start.
(d) Master switch will return to PRIME & RUN position when released.
If running from auxiliary fuel
source, move master switch to PRIME & RUN AUXILIARY FUEL position.
(e) Check oil pressure on engine-mounted gage. Oil pressure should be at least 20 psig. Check
frequency on frequency meter on control panel and adjust governor, if necessary, using speed control. Rated frequency
should register 60 Hz. Pulling speed control knob out will increase frequency, pushing speed control knob In will
decrease frequency. For fine control, turn knob clockwise to increase and counterclockwise to decrease.
(f) Place ammeter-voltmeter transfer switch In position corresponding to the position of the reconnection
switch. Adjust voltage adjust rheostat to 120/208 volts on voltmeter. Turn rheostat clockwise to increase voltage or
counterclockwise to decrease voltage.
(g) Place AC circuit breaker in ON position. Adjust speed control to obtain a full load frequency of 60 Hz.
(h) Place ammeter-voltmeter transfer switch in position to check percent rated current for 3 phase
120/208 V output.
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