Onan CCK - Page 22

An adjustment for too much sensitivity will cause
alternate increase and decrease of engine speed
(hunting).
To decrease sensitivity, shift the adjusting clip toward
theouterend of thegovernorarm. Too little sensitivity
will result in too much difference in speed between no
load and full load conditions.
Any change in the sensitivity adjustment usually
requires a compensating speed (spring tension)
adjustment.
Speed Booster (5.0 CCK Only)
After satisfactory governor performance under
various loads has been attained by adjustments
without the booster, the booster can be connected.
Connect the booster external spring to the bracket on
the governor link (rod). With the unit operating at no
load, slide the bracket on the governor link just to the
position where there is no tension on the external
spring (Figure 19).
Apply a full rated electrical load to the generator. The
output voltage should stabilize at nearly the same
reading for full load as for no load operation. The
speed may remain about the same or increase when
the load is applied, resulting in a frequency 1 or 2
hertz higher than the no load frequency (1 hertz is
equal to 30 rpm for a 4-pole generator). If the
frequency rise is more than 2 hertz, lessen the internal
spring tension. If there is a drop in the frequency,
increase the booster internal spring tension. To
increase the tension, pull out on the spring bracket
and move the pin to a different hole.
With the booster disconnected, a maximum drop of 3
hertz from no load to full load is normal. With the
booster in operation, a maximum increase of 2 hertz
from no load to full load is normal. A drop of 1 hertz at
1/4 load is permissible, giving an overall spread of 3
hertz maximum.
The effect of the booster is limited by the general
condition of the engine. The booster cannot compen¬
sate for a loss in engine vacuum caused by leaky
valves, worn piston rings, etc.
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