Onan CCK Series Operator's Manual And Parts Catalog

SPEED BOOSTER
Use a fine wire to clean the sraall hole in the short
vacuum tube which fits into the hole in the top of
the engine intake manifold. Do not enlarge this hole.
If there is tension on the external spring when the
plant is operating at no load or light load, it may be
due to improper adjustment, restricted hole in the
small vacuum tube, or a leak in the booster diaphragm
FIG. 17. VACUUM SPEED BOOSTER
GOVERNOR LINKAGE
The linkage must be able to move freely through its
entire travel. Every 50 hours of operation, clean the
joints and lubricate, as shown in Figure 18. Also
inspect the linkage for binding, excessive slack and
wear.
FUEL SEDIMENT
Empty carburetor and fuel filter (strainer) bowls of
any accumulated sediment. Clean filter screen thor¬
oughly. Reassemble and check for leaks.
GASOLINE FUEL
Use regular grade automobile gasoline. Do not use
highly leaded premium types.
I WARNINO I Never fill the tank when the engine
is running. Leave some tank space
for fuel expansion.
GENERATOR MAINTENANCE
The generator normally needs little care other than
a periodic check of the brushes, commutator and (
collector rings. If a major repair job on the generator
should become necessary, have the equipment checked
by a competent electrician who is thoroughly familiar
with the operation of electric generating equipment.
BRUSH REPLACEMENT
Install new commutator brushes when the old ones are
worn to 5/8" in length. The collector ring brush may
be used until worn to 5/16" in length. It is not neces¬
sary to remove the brush rig to install new brushes.
Remove the end cover to expose the brush rig. Brushes
and leads are then easily accessible. New brushes
are shaped to fit and seldom need sanding to seat
prc^erly. Always use the correct brush as listed in
the parts list, never substitute a brush which may
appear to be the same, but may have different electrical
characteristics. Be sure to tighten the brush lead
terminal nuts. If some brush sparking occurs after
replacing brushes, run the plant at a light load until
tlie brushes wear to a good seat.
Collector rings acquire a glossy brown finish in normal
operation. Do not attempt to maintain a bright newly
machined appearing surface. Ordinary cleaning with
a dry, lint free cloth is usually sufficient. Very fine
sandpaper (#00) may be used to remove slight rough¬
ness. Use only light pressure on the sandpaper, while
the plant is operating. Do not use emery or carborundum
paper or cloth. Clean out all carbon dust from the
generator.
16

Onan CCK Series Specifications

General

Fuel Type	Gasoline
Fuel System	Carburetor
Frequency	60 Hz
RPM	1800 RPM
Starting System	Electric or Recoil
Starting Method	Electric or Recoil Start
Voltage	120/240V
Compression Ratio	6.5:1
Ignition System	Battery Ignition
Phase	Single-phase