Kohler command CH18 Service Manual page 11

CLEARANCE SPECIFICATIONS
Governor
Governor Cross Shaft-to-Crankcase
Running Clearance
6 mm Shaft
8 mm Shaft
Cross Shaft O.D.
6 mm Shaft
New
Max. Wear Limit
8 mm Shaft
New
Max. Wear Limit
Governor Gear Shaft-to-Governor Gear
Running Clearance
Gear Shaft O.D.
New
Max. Wear Limit
Ignition
Spark Plug Gap
Module Air Gap
Piston, Piston Rings, and Piston Pin
Piston Style A
Piston-to-Piston Pin Running Clearance
Pin Bore I.D.
New
Max. Wear Limit
Pin O.D.
New
Max. Wear Limit
Top Compression Ring-to-Groove Side Clearance
Middle Compression Ring-to-Groove Side Clearance
Oil Control Ring-to-Groove Side Clearance
Top and Middle Compression Ring End Gap
New Bore
Used Bore (Max)
Values are in Metric units. Values in parentheses are English equivalents.
3
24 690 06 Rev. J
CH18/CH20/
3
CH620/CH621/
CH640/CH641
KohlerEngines.com
CH22/CH23/
CH22/ CH620/
CH640/
CH670/CH680
0.013/0.075 mm (0.0005/0.0030 in.)
0.025/0.126 mm (0.0009/0.0049 in.)
5.975/6.012 mm (0.2352/0.2367 in.)
5.962 mm (0.2347 in.)
7.949/8.000 mm (0.3129/0.3149 in.)
7.936 mm (0.3124 in.)
0.015/0.140 mm (0.0006/0.0055 in.)
5.990/6.000 mm (0.2358/0.2362 in.)
5.977 mm (0.2353 in.)
0.76 mm (0.030 in.)
0.28/0.33 mm (0.011/0.013 in.)
0.006/0.017 mm (0.0002/0.0007 in.)
17.006/17.012 mm (0.6695/0.6698 in.)
17.025 mm (0.6703 in.)
16.995/17.000 mm (0.6691/0.6693 in.)
16.994 mm (0.6691 in.)
0.040/ 0.030/
0.080 mm 0.076 mm
(0.0016/ (0.0012/
0.0031 in.) 0.0030 in.)
0.040/ 0.030/
0.080 mm 0.076 mm
(0.0016/ (0.0012/
0.0031 in.) 0.0030 in.)
0.060/ 0.046/
0.202 mm 0.196 mm
(0.0024/ (0.0018/
0.0080 in.) 0.0077 in.)
0.25/ 0.18/
0.45 mm 0.46 mm
(0.0098/ (0.0071/
0.0177 in.) 0.0181 in.)
0.77 mm 0.80 mm
(0.030 in.) (0.0315 in.)
Specifications
CH25/ CH750
CH730/
CH740
0.025/0.048 mm
(0.0010/0.0019 in.)
0.015/0.037 mm
(0.0006/0.0015 in.)
0.026/0.176 mm
(0.0010/0.0070 in.)
0.25/0.56 mm
(0.0100/0.0224 in.)
0.94 mm (0.037 in.)
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