8
Speci
fi
cations
KohlerEngines.com
18 690 06 Rev. --
CLEARANCE SPECIFICATIONS
3
RH255, RH265
Crankcase
Governor Cross Shaft Bore I.D.
New
Max. Wear Limit
6.000/6.018 mm (0.2362/0.2369 in.)
6.037 mm (0.2377 in.)
Crankshaft
End Play (free)
0.025/0.703 mm (0.0010/0.028 in.)
Bore (in crankcase)
New
51.961/51.991 mm (2.0457/2.0469 in.)
Bore (in closure plate)
New
51.961/51.991 mm (2.0457/2.0469 in.)
Flywheel End Main Bearing Journal O.D.
O.D.-New
O.D.-Max. Wear Limit
Max.
Taper
Max.
Out-of-Round
24.975/24.989 mm (0.9833/0.9838 in.)
24.95 mm (0.9823 in.)
0.025 mm (0.0010 in.)
0.025 mm (0.0010 in.)
Closure Plate End Main Bearing Journal O.D.
O.D.-New
O.D.-Max. Wear Limit
Max.
Taper
Max.
Out-of-Round
24.975/24.989 mm (0.9833/0.9838 in.)
24.95 mm (0.9823 in.)
0.025 mm (0.0010 in.)
0.025 mm (0.0010 in.)
Connecting Rod Journal O.D.
O.D.-New
O.D.-Max. Wear Limit
Max.
Taper
Max.
Out-of-Round
Width
29.975/29.985 mm (1.1801/1.1805 in.)
29.920 mm (1.1779 in.)
0.025 mm (0.0010 in.)
0.025 mm (0.0010 in.)
25.02/25.08 mm (0.9850/0.9874 in.)
Runout (either end)
0.025 mm (0.0010 in.)
Cylinder Bore
Bore I.D.
New
Max. Wear Limit
Max.
Out-of-Round
Max.
Taper
68.015/68.030 mm (2.677/2.678 in.)
68.195 mm (2.685 in.)
12.7 microns (0.0005 in.)
12.7 microns (0.0005 in.)
Cylinder Head
Max. Out-of-Flatness
0.1 mm (0.0039 in.)
Governor
Governor Cross Shaft-to-Crankcase Running Clearance
0.013/0.075 mm (0.0005/0.0029 in.)
Governor Cross Shaft O.D.
New
Max. Wear Limit
5.95/5.98 mm (0.2342/0.2354 in.)
5.85 mm (0.2303 in.)
Governor Gear Shaft-to-Governor Gear Running Clearance
0.09/0.19 mm (0.0035/0.0074 in.)
Governor Gear Shaft O.D.
New
Max. Wear Limit
6.028/6.043 mm (0.2373/0.2379 in.)
6.018 mm (0.2369 in.)
3
Values are in Metric units. Values in parentheses are English equivalents.
5
Lubricate threads with engine oil prior to assembly.