Kohler command pro PCH740 - Page 11

Specifi cations
1124 690 32 Rev. A KohlerEngines.com
CLEARANCE
SPECIFICATIONS
3
PCH680, PCH740
Cylinder Bore
Bore I.D.
New 83.006/83.031 mm (3.2680/3.2689 in.)
O.D. - Max. Wear Limit 83.081 mm (3.2709 in.)
Max. Out-of-Round Limit 0.120 mm (0.0047 in.)
Max. Taper 0.05 mm (0.0020 in.)
Cylinder Head
Max. Out-of-Flatness 0.01 mm (0.004 in.)
Governor
Governor Cross Shaft -to-
Crankcase Running Clearance
0.025/0.126 mm (0.0009/0.0049 in.)
Cross Shaft O.D.
New
Max. Wear Limit
7.949/8.000 mm (0.3129/0.3149 in.)
7.936 mm (0.3124 in.)
Governor Gear Shaft -to-
Governor Gear Running
Clearance
0.090/0.160 mm (0.0035/0.0063 in.)
Gear Shaft O.D.
New
Max. Wear Limit
5.990/6.000 mm (0.2358/0.2362 in.)
5.977 mm (0.2353 in.)
Ignition
Spark Plug Gap 0.76 mm (0.030 in.)
Crankshaft Position Sensor Air
Gap 0.2-0.7 mm (0.008-0.027 in.)
Piston, Piston Rings, and Piston
Pin
Piston-to-Piston Pin Running
Clearance
0.006/0.017 mm (0.0002/0.0007 in.)
Pin Bore I.D.
New
Max. Wear Limit
17.006/17.012 mm (0.6695/0.6698 in.)
17.025 mm (0.6703 in.)
Pin O.D.
New
Max. Wear Limit
16.995/17.000 mm (0.6691/0.6693 in.)
16.994 mm (0.6691 in.)
Top Compression Ring-to-
Groove Side Clearance
0.030/0.070 mm (0.001/0.0026 in.)
Middle Compression Ring-to-
Groove Side Clearance
0.030/0.070 mm (0.001/0.0026 in.)
Oil Control Ring-to-Groove Side
Clearance
0.060/0.190 mm (0.0022/0.0073 in.)
Top Compression Ring End Gap
New Bore 0.189/0.277 mm (0.0074/0.0109 in.)
Used Bore (Max.) 0.531 mm (0.0209 in.)
Center Compression Ring End
Gap
New Bore 1.519/1.797 mm (0.0598/0.0708 in.)
Used Bore (Max.) 2.051 mm (0.0808 in.)
3
Values are in Metric units. Values in parentheses are English equivalents.