Onan CCKB User Manual

SAFETY DEVICES (Optional)
A high air temperature switch can be installed in the
cooling system that stops the set if the engine
overheats.
If the engine has a low oil pressure switch, the switch
will stop the set whenever the oil pressure drops
below a safe operating pressure. After such a stop,
investigate and correct the cause.
BREAK-IN PROCEDURE
A reconditioned unit should be run in the following
sequence using SEorSE/CCoil (seeoil requirements
for correct viscosity). New units have been run under
load at the factory.
1. One half hour at half load.
2. One half hour at three quarter load.
3. Full load for several hours, if possible.
This method of load application speeds piston ring
seating Continuous running at half (or lighter) load
for the first few hundred hours usually results in poor
piston ring seating, causing higher than normal oil
consumption and blow-by.
STARTING SEQUENCE
1. Operator pushes START switch or set is started
by remote control.
2. Start solenoid energizes.
3. Battery current flow to:
a) series field
b) STOP relay
c) electric choke
4 Ignition coil fires spark plugs when breaker points
open.
5. Engine starts
6 Operator releases START switch
7. Start-disconnect relay energizes
8. Engine continues running.
STOPPING SEQUENCE
1. Operator pushes STOP switch
2. Stop relay opens ignition circuit
3. Engine stops
4. Operator releases STOP switch.
GENERATING SET EXERCISE
Infrequent use results in hard starting. Operate
generating set one 30-minute period each week. Run
longer if battery needs charging, or keep battery
charged with a separate charger. Exercising for one
long period each week is better than several short
periods.
GAS-GASOLINE CONVERSION
Engines having a combination gas-gasoline car¬
buretor can be switched to gasoline operation by the
following procedure:
1. Close the gaseous fuel shutoff valve in supply
line, wherever located.
2. Open the gasoline fuel shutoff valve, wherever
located.
3. Set the spark plug gap as given in the
Specifications section.
4. See that the choke is free and works easily (be
sure to release choke lock on units with electric
choke).
5. Start the engine. If the engine runs unevenly
under half or full load, the carburetor main jet
probably needs adjusting. This is not the same
main adjusting screw as that used for gaseous
fuel. Another adjusting screw is provided for this
purpose (refer to Adjustments section).
To change back to gaseous fuel operation, reverse the above
procedure.
HIGH TEMPERATURE OPERATION TIPS
1. See that nothing obstructs air flow to-and-from
the set.
2. Keep cooling system clean.
3. Keep ignition timing properly adjusted.
4. Use correct oil grade (heavier).
LOW TEMPERATURE OPERATION TIPS
1. Use correct SAE No. oil for temperature con¬
ditions. Change oil only when engine is warm. If
an unexpected temperature drop causes an
emergency, move the set to a warm location or
apply heated air (never use open flame) externally
until oil flows freely.
2. Use fresh non leaded or regular grade (not
P^erri/um) gasoline. Protect against moisture con¬
densation. Below 0° F (-18° C) adjust carburetor
main jet for slightly richer fuel mixture.
3. Keep ignition system clean, properly adjusted,
and batteries in a well charged condition.
4. Partially restrict cool airflow but use care to avoid
overheating.
HIGH ALTITUDE
For operation at altitudes of 2500 feet (762 m) above
sea level, close carburetor main jet adjustment slight¬
ly to maintain proper air-to-fuel ratio (refer to
Adjustments section). Maximum power will be reduc¬
ed approximately 4 percent for each 1000 feet (305 m)
above sea level, after the first 1000 feet (305 m).
10

Onan CCKB Specifications

General

Engine Model	CCKB
Fuel Type	Gasoline
Cooling System	Air-cooled
Phase	Single-phase
Governor Type	Mechanical
Rated RPM	1800 RPM
Frequency	60 Hz
Ignition System	Battery Ignition
Starting System	Electric
Voltage	120/240 V
Rated Output	4.0 kW (5.0 kVA)
Maximum Output	5.5 kW
Oil Capacity	2 quarts
Generator Type	Revolving field
Fuel Consumption at Full Load	0.75 GPH
Fuel Consumption at Half Load	0.4 GPH