Kohler command pro ECH749 Service Manual page 19

CLEARANCE
SPECIFICATIONS 3
Piston, Piston Rings, and Piston Pin (Style A continued)
Top Compression Ring-to-
Groove Side Clearance
Middle Compression Ring-to-
Groove Side Clearance
Oil Control Ring-to-Groove Side
Clearance
Top and Center Compression
Ring End Gap
New Bore
Used Bore (Max.)
Thrust Face O.D.
7
Max. Wear Limit
Piston Thrust Face-to Cylinder
Bore Running Clearance
7
New
Piston Style B
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 Compression Ring End Gap
New Bore
Used Bore (Max.)
Middle Compression Ring End
Gap
New Bore
Used Bore (Max)
Thrust Face O.D.
New
Max. Wear Limit
Piston Thrust Face-to Cylinder
Bore Running Clearance
New
Values are in Metric units. Values in parentheses are English equivalents.
3
Measure 6 mm (0.2362 in.) above bottom of piston skirt at right angles to piston pin.
7
Measure 13 mm (0.5118 in.) above bottom of piston skirt at right angles to piston pin.
8
24 690 01 Rev. K
ECH630-ECH680 ECH730-ECH749
0.050/0.095 mm (0.0019/0.0037 in.)
0.030/0.075 mm (0.0012/0.00307 in.)
0.010/0.011 mm (0.0004/0.0043 in.)
0.80 mm (0.0315 in.)
79.943/79.961 mm
(3.1473/3.1480 in.)
79.816 mm
(3.1423 in.)
0.039/0.082 mm (0.0015/0.0032 in.)
0.006/0.017 mm (0.0002/0.0007 in.)
17.006/17.012 mm (0.6695/0.6698 in.)
16.995/17.000 mm (0.6691/0.6693 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.)
0.100/0.279 mm
(0.0039/0.0110 in.)
0.490 mm
(0.0192 in.)
1.400/1.679 mm
(0.0551/0.0661 in.)
1.941 mm
(0.0764 in.)
79.966 mm
(3.1483 in.)
8
79.821 mm
(3.1426 in.)
8
0.025/0.068 mm
(0.0010/0.0027 in.) 8
KohlerEngines.com
CH26
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.)
82.949/82.967 mm (3.2657/3.2664 in.)
82.822 mm (3.2606 in.)
17.025 mm (0.6703 in.)
16.994 mm (0.6691 in.)
0.189/0.277 mm (0.0074/0.0109 in.)
0.531 mm (0.0209 in.)
1.519/1.797 mm (0.0598/0.0708 in.)
2.051 mm (0.0808 in.)
82.978 mm (3.2668 in.)
82.833 mm (3.2611 in.)
0.019/0.062 mm (0.0007/0.0024 in.)
Specifi cations
CH735 CH745
7
7
7
19