Onan CCK User Manual

3. Adjust the length of the governor linkage and
check linkage and throttle shaft for binding or
excessive looseness.,
4. Adjust the governor spring tension for rated
speed at no load operation with booster dis¬
connected (or held inoperative).
5. Adjust the governor sensitivity.
6. Recheck the speed adjustment.
7. Set the carburetor throttle stop screw.
8. Set the vacuum speed booster.
Linkage
The engine starts at wide open throttle. The length of
the linkage connecting the governor arm to the
throttle shaft and lever is adjusted by rotating the ball
joint. Adjust this length so that with the engine
stopped and tension on the governor spring, the stop
on the carburetor throttle lever just contacts the
underside of the carburetor bowl. This setting allows
immediate control by the governor after starting. It
also synchronizes travel of the governor arm and the
throttle shaft.
Speed Adjustment
With the warmed-up unit operating at no load, and
with the booster external spring disconnected (or
otherwise held inactive), adjust the governor spring
tension. Refer to Voltage Chart and the Speed Chart
and select the column which corresponds to the
nameplate of the unit in question. Turn the speed
adjusting nut to obtain a voltage and speed reading
within the limits shown.
VOLTAGE CHART
FOR CHECKING GOVERNOR REGULATION
AC GENERATING SETS
120 VOLT
1 PHASE
2 WIRE
120/240 VOLT
1 PHASE
3 WIRE
Maximum No Load Volts
126
126/252
Minimum Full Load Volts
Without Booster
110
110/220
NOTE: Output rating is at UNITY power factor load.
SPEED CHART
FOR CHECKING GOVERNOR REGULATION
Maximum No Load Speed
RPM
Hertz (Current Frequency)
1890
63
Minimum Full Load Speed
Without Booster
RPM
1770
Hertz
59
Sensitivity Adjustment
Refer to the Governor Adjustment illustration, and to
the Voltage and Speed Charts. Check the voltage and
speed, first with no load connected and again with a
full load. Adjust the sensitivity to give the closest
regulation (least speed and voltage difference
between no load and full load) without causing a
hunting condition.
To increase sensitivity (closer regulation), shift the
adjusting clip toward the governor shaft.
CARBURETOR THROTTLE PLATE
THROTTLE STOP SCREW ^
SPEED
ADJUSTING NUT—
(SEE INSERT)
GOVERNOR SPRING
THIS DISTANCE
DETERMINES SENSITIVITY
GOVERNOR
ARM AND SHAFT
SI
*EED
'REAS*
:reas§^
V* governor control
LINKAGE
GOVERNOR
SHAFT YOKE
GOVERNOR CUP
VACUUM
BOOSTER
FIGURE 19. GOVERNOR AND SPEED BOOSTER
19

Onan CCK Specifications

General

Cylinders	2
Ignition System	Battery ignition
Fuel Type	Gasoline
Cooling System	Air-cooled
Fuel System	Carburetor
Starter	Electric
Governor	Mechanical
Max RPM	1800 RPM
Engine Type	4-cycle
Bore and Stroke	3.25 x 3.625 inches (82.55 x 92.08 mm)