following instructions also apply when operating an alternating current power generator set.
Before the first start, check the generator main bearing oil reservoir. If necessary, add sufficient lubricating oil, of
the same grade as used in the engine crankcase, to bring it to the proper level on the sight gage.
Check the interior of the generator for dust or moisture. Blow out dust with low pressure air (25 psi or 172 kPa
maximum). If there is moisture on the interior of the generator, it must be dried before the set is started. Refer to the
appropriate Delco Products Maintenance bulletin.
The air shut-off valve located in the air inlet housing must be in the open or reset position.
Refer to Fig. 1 and place the circuit breaker in the off position.
If the generator set is equipped with synchronizing lamps, place the lamp switch in the off position.
Turn the voltage regulator rheostat knob counter- clockwise to its lower limit.
Make sure the power generator set has been cleared of all tools or other objects which might interfere with its
If the generator set is located in a closed space, start the ventilating fan or open the doors and windows, as weather
permits, to supply ample air to the engine.
The engine may require the use of a cold weather starting aid if the ambient temperature is below 40° F (4° C). Refer to
Cold Weather Starting Aids.
Press the throttle button and turn the throttle control (Fig. 1) counterclockwise to a position midway between run and
stop. Then press the starting switch firmly.
If the engine fails to start within 30 seconds, release the starting switch and allow the starting motor to cool a few minutes
before trying again. If the engine fails to start after four attempts, an inspection should be made to determine the cause.
CAUTION: To prevent serious damage to the starter, if the engine does not start, do not press the starting
switch again while the starting motor is rotating.
Observe the engine oil pressure gage immediately after starting the engine. If there is no oil pressure indicated within 10
to 15 seconds, stop the engine and check the engine lubricating system.
If the oil pressure is observed to be normal, increase the throttle setting to cause the engine to run at its synchronous
PREPARING GENERATOR FOR LOAD
After the engine is warmed up (or the oil pressure has stabilized) prepare the generator set for load as follows:
Bring the engine up to the rated speed.
Turn the instrument switch to the desired position.
Turn the voltage regulator rheostat knob slowly in a clockwise direction to raise the voltage, while watching the
voltmeter, until the desired voltage is attained.
If the generator set is equipped with a frequency meter, adjust the engine speed with the vernier throttle knob until
the desired frequency is indicated on the meter.
Make sure all power lines are clear of personnel, then place the circuit breaker control in the on position.
NOTE: Perform Step 5 only if the generator set is not being paralleled with an existing power source. If it
is being paralleled with a power source already on the line, read and follow the instructions under
Paralleling before turning the circuit breaker control to the on position.
If the load conditions require an additional unit to be placed on the line, the following instructions will apply to power
generator sets of equal capacity, with one generator set in operation on the line.
Prepare the generator set to be paralleled as outlined under Preparation For Starting, Starting, Running and Items
1through 4 under Preparing Generator for Load.
Check the voltmeter (Fig. 1); the voltage must be the same as the line voltage. Adjust the voltage regulator
rheostat control if the voltages are not the same.
Place the synchronizing lamp switch, of the generator set to be paralleled, in the on position.