Onan CCK Series User Manual

4
DESCRIPTION
ENGINE DETAILS
The engine is a horizontally opposed 2 cylinder, air cooled, 4 stroke cy-
cle, L head internal combustion type. Standard models burn gasoline
fuel.. Some
special models are equipped with a combination type carbure-
tor for burning either gasoline or gas fuel.
The cylinder bore is 3-1/4 inches, the piston stroke 3 inches, piston
displacement 50 cubic inches, compression ratio 5. 5to L The cast
iron cylinder and crankcase isa single casting.
The engine speed is controlled by aflyball type governor built into the
camshaft gear. The governor is externally adjustable. The governor
function is supplemented by a speed booster. The booster is operated
by manifold vacuum and serves to improve stability under load condi-
tions.
Ignition current on manual and portable type plants is supplied by a high
tension, flywheel magneto. Ignition current on remote control type
plants is supplied by the starting battery. .
The engine is cooled by air forced around the cylinder walls and head.
Plants which are "pressure cooled" have blower fins on the flywheel
which
draw air in throughthe opening at the front of the blower housing.
Special models of the remote control type plants may be Vacu-FloCooled
and have blower fins which expel heated air out through the duct at the
front of the blower housing, as desirable for small enclosure installa-
tions.The letier"V" appears in the model ofVacu-Flo cooled type
plants. (Example: 5CCK-3RV /lA). .
The engine has aluminum alloy 3 ring pistons, and full floating type pis-
ton pins .. The counterbalanced crankshaft turns in two unusually large
main bearings which are replaceable-precision-sleeve type. The con-
necting rods are aluminum alloy with integral bearing. Special models
may have forged steel connecting rods and replaceable rod .bearings.
The exhaust valves and seats are Stellite faced. Valve tappets are ad-
justable self-locking. A positive rotator for each exhaust yalve provides
long trouble free performance (Rotators not on "Spec A" models).
The gear type oil pump supplieS! pressure lubrication to main and con-
nectingrod bearings. Oil pressure is controlled by an externally-ad-
justable .spring loaded relief valve.

Onan CCK Series Specifications

General

Brand	Onan
Model	CCK Series
Category	Portable Generator
Language	English