Hobart 9OC24S Operation Manual page 187

OPERATION, MAINTENANCE ,. AND OVERHA.UL MAN UAL, TM-240A
SELF-PROPELLED GENERATOR SET, SPEC. NO, 5381A
Adjust "reset-droop" to stabilize engine speed. (Screw rotation require-
ment, CLOCKWISE or COUNTERCLOCKWISE, cannot be predetermined.)
Again, turn the "gain" adjustment screw CLOCKWISE until the engine
becomes slightly unstable.
Stabilize with "reset" adjustment. Repeat
this procedure until the reset potentiometer will no longer stabilize engine
operation. Turn the "gain " adjusting screw back to its last position and
stabilize. Tighten locknuts.
NOTE: Although best performance is obtained with the "gain" setting as
high as possible (clockwise) while the engine is still stable, it is
not advisable to adjust the "gain"
too high because an excessively
"high" or delicate adjustment will very likely result in unstable
(surging) operation when the unit is not thoroughly warmed. A
setting near graduation number "8" on the "gain" adjustment
will generally produce the most satisfactory overall performance.
F. Accelerator Linkage Adjustment
The accelerator linkage, illustrated in Fig. 13, provides a means of manually con-
trolling engine speed for mobile operation of the self-propelled unit by mechanical
operation of the hydraulic actuator. Linkage components are shown in IDLE position.
Dotted lines represent full "drive speed" position, which is somewhat less than the
full speed position attainable by the actuator arm (1). Engine speed is limited to
2640 RPM in DRIVE mode by a speed limiting governor in the engine fuel pump.
(Top speed is also limited by the same device in GEN mode.)
The end (not illustrated) of the cable core (7) is attached to a lever actuated by the
accelerator pedal. Depressing the pedal pulls the core (7) and attached finger (2)
in a direction which moves the arm (1) to increase engine speed. The most important
thing in the adjustment of this linkage is to locate the finger (2) on core (7) so that
arm (1) will operate freely to full IDLE position when the accelerator pedal is in
RE LEASED position.
To adjust accelerator linkage, proceed as follows, with engine STOPPED.
(1) Check operation of the accelerator pedal and make certain that it operates
freely through its full travel and that the return spring is in good condition
and returning the pedal to idle position properly.
(2) With the engine stopped, the actuator lever (4, Fig. 9) will be in FULL SPEED
position. Lift the lever (4) to IDLE position and observe clearance at A, Fig.
13, between arm (1) and finger (2). Clearance should be at least l/16 inch
when all components are in IDLE position.
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