Onan MCCK Series User Manual

Dimensions and Clearances
.
All clearances given at room temperature of 70°F (21°C) . All dimensions in inches (approximate millitnetre dimensions in
parentheses) unless otherwise specified
.
.
DESCRIPTION
CYLINDER BLOCK
Maximum Allowable
Cylinder Bore Honed Diameter
.........................................
Taper ................................................................
Out-of-Round .......................................................
Main Bearing Inside Diameter (Without bearing) ........................
Main Bearing Inside Diameter (Installed) ................................
Camshaft Bearing Bore (Bearing installed) ..............................
CRANKSHAFT
Main Bearing Journal Diameter .........................................
Main Bearing Clearance ................................................
Connecting Rod Journal Diameter ......................................
Crankshaft End Play ...................................................
CONNECTING ROD
Large Bore Diameter (Without bearing installed
and rod bolts properly torqued)
......................................
Connecting Rod Side Clearance ........................................
Piston Pin Bushing Bore (Without bearing) .............................
(Finished bore) ......................................................
Nodular Iron Rod ....................................................
Aluminum Rod ......................................................
Bearing Journal Diameter ..............................................
Bearing Clearance .....................................................
End Play ...............................................................
Camshaft Lift ..........................................................
PISTON
Clearance in Cylinder
Piston Pin Bore ........................................................
Ring Groove Width
Piston Pin Bushing Bore with Bearing.
Bearing to Crankshaft Clearance
CAMSHAFT
Measure 90" to pin 0.10 inch below oil ring ...........................
Top 1 Compression Ring ............................................
No . 2 Compression Ring .............................................
No . 3 Oil Control Ring ...............................................
Inches
3.2490
2.1 87
2.0020
1.3760
1.9992
0.0025
1.6252
0.006
1.7505
0.0020
0.81
15
0.7504
0.0005
0.0020
1.3740
0.001 5
0.0030
0.0025
0.7502
0.0960
0.0955
0.188
(mm) Inches (mm)
(82.525) 3.2500 (82.550)
0.005 (0.1 27)
0.002 (0.051)
(55.55) 2.188 (55.58)
(50.85) 2.0030 (50.88)
(34.95) 1.3770 (34.98)
(50.78) 2.0000 (50.80)
(0.064)
0.0038 (0.097)
(41.28) 1.6260 (41.30)
(0.1 52)
0.01
2 (0.305)
(44.46)
1.7510 (44.48)
(0.051) 0.0160 (0.406)
(20.61) 0.8125 * (20.64)
(19.05) 0.7508 (19.07)
(0.013) 0.0023 (0.058)
(0.051)
0.0033 (0.084)
(34.90)
1.3745 (34.91)
(0.038)
0.0030 (0.076)
(0.076)
0.0120 (0.305)
0.300 (7.62)
(0.064)
0.0045 (0.1 14)
(1 9.055) 0.7506 (1 9.065)
(2.438)
0.0970 (2.464)
(2.426)
0.0965 (2.451)
(4.775)
0.189 (4.801)
*
MINIMUM MAXIMUM
4
Redistribution or publication of this document
by any means, is strictly prohibited.
Redistribution or publication of this document
by any means, is strictly prohibited.

Onan MCCK Series Specifications

General

Cylinders	2
Fuel Type	Gasoline
Governor Type	Mechanical
Starting	Electric
Lubrication System	Pressure
Rotation	Counterclockwise
Bore	3.25 in. (82.6 mm)