Onan CCK Series User Manual

MAINTENANCE AND REPAIR
65
wear of piston, pin, cylinder and connecting rod.
Install the connecting rods and caps with raised lines (witness marks)
aligned and with the caps facing toward the oil base. The rod and cap
numbered "2" goes on the journal which is farther from timing gears.
Coat the crankshaft journal bearing surfaces with oil before installing
the rods. Crank the engine by. hand to see that the rods are free. If
necessary, rap the connecting rod cap screws sharply with a soft faceci
hammer to set the rod square on the journal ..
BEARINGS. ~ Removal of the camshaft or crankshaft bearings'requires
complete disassembly of the engine. Use a press or a
suitable drive plug to remove the bearings. Support the casting to avoid
distortion and avoid damaging the bearing bore during removal and in-
stallation. Use oil on bearings to reduce friction when installing and
again lubricate with oil after installing.
New crankshaft mainbearings are precision type which DO NOT re-
quire line reaming or line boring after installation. They are available
in standard size or in 0.002 inch or 0.020 inch undersize. Expand the
bearing bore by placing the casting in hot water or in an oven heated to
200
0
F. Be careful, if a torch is used, to apply only a little heat! If
practical, cool the preCision bearing to shrink it. Align the oil hole(s)
in bearing with the oil hole(s) in bearing bore. The oil passage must
be at least 1/2 open. The cold oiled preCision bearing should require
only light taps to position it.. Install the flanged type bearing (used
prior to Spec F) with its notch engaged with the stop pin. Install the
bronze faced bearing (used beginning with Spec F) flush with the inside
end of bore. If head of lock pin is damaged, use side cuttersor "easy-
out" tool to remove and install new pin. Apply oil to. thrust washer
(one used with each bearing, begin Spec F) to hold it in place while in-
stalling the crankshaft.' Oil grooves in thrust washers must face the
crankshaft, washers must be flat (not bent) and washer's two notches
must fit over two lock pins to prevent riding on crankshaft.
. . \
Install the front camshaft bearing with its oil hole aligned with the hole
inthe bore (except bores without oil hole install with bearing groove at
top) . Press it in flush with the outside end of the bore. Install the rear
. camshaft bearing with its plunger. notch faCing out and aligned with the
hole in the bearing bore. Press or drive it in flush with the bottom of
the counterbore which receives the expansion plug.
The camshaft bearings must be line bored or line reamed after being
installed in the cylinder block, to allow a clearance as sholvn in the
Table of Clearances. For· this service, consult a reliable machine
shop, your dealer or factory ... Install the expansion plug of th<." rt:ar
bearing.
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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