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Onan CCK Series User Manual

Onan CCK Series
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44
ADJUSTMENTS
As
the
load
on
the
plant
is
increased,
the
engine vacuum
becomes
less,
and
booster
internal
spring
tension
overcom~s
the pull
of
the
diaphragm,
and
tension
is
put on
the
booster
external
sptiIig.
The
tension
on
the
ex-
,
ternal
spring
"helps"
the·
regular
governor
spring
in
its
function, thus
causing
a
slight
increase
in engine
speed
as
the
load
is
increased.
A binding
in
the
bearings
of the
governor
shaft, in
the
ball
joint,
or
in
the
carburetor
throttle
assembly
will
cause
~rratic
governor
action
or
alternate
increase
and
decrease
in
speed
(huhting). A
lean
carburetor
adjustment
may
also
cause
hunting. Springs, of
all
kinds
have
a tendency
to
lose
their
calibrated
tension
through
fatigue
after
long
usage.
If
all
governor
and
carburetor
adjustments
are
properly
made, and
the
gover-
nor
action
isstiU
erratic,
replacing
the
spring
with a
new
one
and
reset-
ting
the
adjustments
will usually·
correct
the
,trouble.
2. STEPS TO FOLLOW. -
This
gives tlie
p~ocedure
only
briefly.
Refer
to
the
details
on
'eac.hsubject
herein.
. .
a.
Adjust
the
carburetor
main
jet
for
the
best
fuel
mixture
while
oper-
ating
the
plant
with a full
rated
load
connected.
b.
Adjust
the
carburetor
idle needle
with
no load connected.
c.Adjust
the length of·the
governor
linkage.
d, Check
the
governor
linkage and
throttle
shaft
for
binding
or
exces-
.
sive
looseness.
e,
Adjust
the
governor
spring
tension
for
rated
speed
at
no load
opera-
tion
with
booster
disconnected (or held
inoperative).
f.Adjust
the
governor
sensitivity.
.
g.
Recheck
the
speed
adjustment.
h.
Set
the
carburetor
thr6ttle
stop
screw.
i.
Setthe
vacuum
speed-booster.
3. LINKAGE. -
The
engine
starts
at
wide open
throttle.
The
length
of
the
linkage connecting
the
governor
arm
to
the
thr'otUe
shaftand
ievertsadjusted
by
rotating
the
ball
joint.
Adjust
this
length
so
that
withthe
engine stopped and
tension
on
the
governor
spring,
the
stop
on
the.
carburetor
throttle
shaft
just
contacts
the
underside
of
the.
carburetor
bowl,
as
illustrated.
,This
setting
allows
immediate
control
by
the
governor
after
starting.
It
also
synchronizes
the
travel
of
the
.
.
governor
arm
and
the
throttle
shaft.
4.
SPEED
ADJUSTMENT. - With
the
warmed-up
plant
operating
at
no
load, and with
the
booster
external
sprIng
.
disconnected
(or
otherwise
held
inactive),
adjusUhetension
of the
gov,..
ernor
spring.
Refer
the
Voltage
Chart
and
the
Speed
Chart
and
select
theeolumn
which
corresponds
to
thenaineplate
of
the
plant in question.
Turn
the
speed
adj
usting
nut
to
obtain a voltage and speed
reading
with-
in
the
Hrriitsshown.
.

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Onan CCK Series Specifications

General IconGeneral
Fuel TypeGasoline
Fuel SystemCarburetor
Frequency60 Hz
RPM1800 RPM
Starting SystemElectric or Recoil
Starting MethodElectric or Recoil Start
Voltage120/240V
Compression Ratio6.5:1
Ignition SystemBattery Ignition
PhaseSingle-phase

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