Dimensions And Clearances - Onan MDJF Series Operator's Manual And Parts Catalog

DIMENSIONS AND CLEARANCES
All clearances given at room temperature of 7 0 ° F .
All dimensions in inches unless otherwise specified.
Minimum Maximum
CAMSHAFT
Bearing Journal Diameter, Front 2.2500 2.2505
Bearing Journal Diameter, Rear 1.1875 1.1880
Bearing Clearance Limit 0012 .0037 '
End Play, Camshaft (in back position) 007 .039
Cam Tappet Hole Diameter 8755 .8765
Cam Tappet Diameter 8730 .8725
CONNECTING RODS
Large Bearing Diameter (I.D.) ' 2.0615 2.0630
Small Bushing Diameter (I.D.) . . . 0.9903 0.9906
Clearance, Large Bearing to Crankshaft ' 001 .0033
CYLINDER
Cylinder Bore 3-1/2
Cylinder Diameter Limits 3.4995 3.5005
CRANKSHAFT
Main Bearing Journal Diameter 2.2427 2.2435
Crankshaft Main Bearing Clearance (Original Equipment) 0030 .0043
Connecting Rod Journal Diameter 2.0597 2.0605
End Play, Crankshaft 010 .015
PISTON (Measure 9 0 ° to Pin)
Piston Clearance to Cylinder Wall below O i l Ring Groove 0055 .0075
Piston Pin Hole Diameter 99005 .99025
Ring Groove Width, Top 097 .098
Ring Groove Width, 2nd . .0965 .0975
Ring Groove Width, 3rd 0965 .0975
Ring Groove Width, 4th 1895 .1880
PISTON PIN
Length 3.003 2.988
Diameter 9899 .9901
Piston Clearance Thumb Push F i t
Connecting Rod Bushing Clearance 0002 .0007
PISTON RINGS
Ring Type
Top Compression
2nd Compression
3rd O i l Scraper & Compression
Ring Width
Top f 0925 .0935
2nd 0925 .0935
3vd *"::: 0925 1 .0935