Hobart 9OC24S Operation Manual page 176

HOBAR?
e
a
QD
gMOTOR GENERATOR DIVISION
,=
HOB.mT BROTHERS COMPANY
;
% . ~ .,,d
OPERATION, MAINTENANCE, AND OVERHAUL MAN UAL, TM-24OA
:
SELF-PROPELLED GENERATOR SET, SPEC. NO:5381A
the other.
For example, improving the response by adjusting the "damp"
potentiometer (1) may affect the stability as adjusted by the "rate" potentiometer
(2). Adjust as follows:
(aa) If "damp" and "rate" adjustments have been disturbed (changed from
factory setting), or if the regulator has been repaired, loosen lock-
ing nuts and set both potentiometers to mid-position (halfway between
full CLOCKWISE and full COUNTERCLOCKWISE).
(bb) Connect the generator output to a balanced, three-phase load of 30
kilowatts.
(cc) With generator running at 115 V AC no load, operate the contactor
"on-off" switch (17, Fig. 2). If the average phase voltage charged
more than 1. volt, or if output is unsteady, adjust "damp" and "rate".
(dd) Turn the "damp" (1, Fig. 7) adjusting screw CLOCKWISE to improve
response. Turn COUNTERCLOCKWISE to improve STABILITY. Gen-
erally the best adjustment is approximately 3/4 of full CLOCKWISE
travel.
(ee) Turn the "rate" (2) adjusting screw to near full COUN IERCLOCKWISE
position. Turn the screw slowly CLOCKWISE until the voltage output
abruptly becomes STEADY. Continue turning the screw CLOCKWISE
5 deg to 10 deg past this point for
best
"rate" adjustment.
(ff) Tighten adjusting screw locknuts after adjustment is completed.
C. Basic Engine Adjustments
Adjustment procedures applicable to the diesel engine are included in the Cummins
Operation and Maintenance Marrual, which is located in Chapter 8. Specific infor-
mation for this particular engine application is listed in Figure 8.
(1) Exhaust valve adiustment
Refer to page 5-23 in the Cummins Operation and Maintenance Manual.
(2) Exhaust va Ive crosshead ad justmen t
Refer to page 5-26 in the Cummins Operation and Maintenance Manual.
(3) Fuel injector timing adjustment
Refer to page 5-23 in the Cummins Operation and Maintenance Manual.