Hobart 9OC24S Operation Manual page 165

(3)
(4)
(5)
Again check for oil, fuel, and coolant leaks and correct any leaking condition.
(6)
Position switches and controls for automatic voltage regulation and power
de livery as fol lows:
(7)
(8)
(9)
(10)
(11)
GENERATOR DIVISION
HOBART BROTHERS COMPANY
OPERATION i MAIN ENAN CE , AN D OVERHAUL LAN UAL, ~~-240~
SELF-PROPELLED GENERATOR SET, SPEC. NO. 5381A
Record hourmeter reading for future reference.
"
Check engine idle speed. Should be 650 RPM, plus or minus 25 RPM.
NOTE: A stroboscope is required for this check.
If adjustment is required, contact the local Cummins Engine Distributor.
(a) Place automatic-manual switch [(33) Fig. 21 in AUTOMATIC position.
(b) Place test bank switch (40) in OFF position.
(c) Meter switch (34) may be in any position except pointing straight down.
(d) If the adjustment of the voltage regulator rheostat (46) has been disturbed,
adjust to mid-range position.
Bring the engine up to governed speed and also energize the generator by
placing the operating mode switch (20) in GEN position.
If the engine comes up to governed speed, indicated by a near 400 Hz reading
on the frequency meter (6), and voltage value appears on the voltmeter (30),
it proves that the electric-hydraulic governor and excitation-deenergization
relay circuits are functioning.
Observe frequency meter (6). If engine speed is properly adjusted, frequency
will be exactly 400 Hz.
If not, adjust engine governed speed in accordance
with Para. 3, E, (4).
Observe voltmeter (29). Use rheostat (44) to adjust voltage to 115 V AC.
Measure magnetic pickup voltage at terminals 5 and 6, Fig. 12. Voltage
should be at least 4 to 8 V AC at no load and governed (2400 RPM) speed.
If voltage is low, adjust magnetic pickup in accordance with instructions in
Para. 3, E, (2).
Measure input voltage at actuator between terminals (1 and 2, Fig. 10).
Should be 2 to 4 V DC. If voltage is not in this range, adjust actuator in
accordance with Para. 3, E , (3).
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