Kohler Command Pro EFI ECH940 Service Manual page 19

CLEARANCE SPECIFICATIONS
Ignition
Spark Plug Gap
Crankshaft Bearing (fl ywheel/PTO)
New (installed)
Max. Wear Limit
Piston, Piston Rings, and Piston Pin
Piston-to-Piston Pin Running Clearance
Piston Pin Bore I.D.
New
Max. Wear Limit
Piston 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 Compression Ring End Gap
New
Max. Wear Limit
Middle Compression Ring End Gap
New
Max. Wear Limit
Piston Thrust Face O.D.
New Bore
Used Bore (max.)
Piston Thrust Face-to-Cylinder Bore
New
Valves and Valve Lifters
Hydraulic Valve Lifter to Crankcase Running Clearance
Intake Valve Stem-to-Valve Guide Running Clearance
Exhaust Valve Stem-to-Valve Guide Running Clearance
Intake Valve Guide I.D.
New
Max. Wear Limit
Exhaust Valve Guide I.D.
New
Max. Wear Limit
Valve Guide Reamer Size
Standard
0.25 mm O.S.
Nominal Valve Face Angle
2 Values are in Metric units. Values in parentheses are English equivalents.
Measure 11 mm (0.4331 in.) above bottom of piston skirt at right angles to piston pin.
6
62 690 13 Rev. A
2
6
Running Clearance
6
KohlerEngines.com
ECH940 ECH980
0.76 mm (0.030 in.)
45.040/45.145 mm (1.773/1.777 in.)
45.158 mm
0.006/0.017 mm (0.0002/0.0007 in.)
20.006/20.012 mm (0.7876/0.7879 in.)
20.025 mm (0.7884 in.)
19.995/20.000 mm (0.7872/0.7874 in.)
19.994 mm (0.7872 in.)
0.030/0.070 mm (0.001/0.0026 in.)
0.030/0.070 mm (0.001/0.0026 in.)
0.060/0.190 mm (0.0022/0.0073 in.)
0.125/0.304 mm (0.0049/0.0120 in.)
0.515 mm (0.0203 in.)
0.900/1.179 mm (0.0354/0.0464 in.)
1.432 mm (0.0564 in.)
89.972 mm (3.5422 in.)
89.827 mm (3.5365 in.)
0.021/0.060 mm (0.0008/0.00236 in.)
0.012/0.050 mm (0.0004/0.0019 in.)
0.038/0.076 mm (0.0015/0.0030 in.)
0.050/0.088 mm (0.0020/0.0035 in.)
7.038/7.058 mm (0.2771/0.2779 in.)
7.135 mm (0.2809 in.)
7.038/7.058 mm (0.2771/0.2779 in.)
7.159 mm (0.2819 in.)
7.048 mm (0.2775 in.)
7.298 mm (0.2873 in.)
45°
Specifi cations
19