Kohler Command CH25

1.11
Section 1
Safety and General Information
1
Crankshaft cont.
Crankshaft T.I.R.
PTO End, Crank in Engine ............................................................................. 0.279 mm (0.0110 in.)
Entire Crank, in V-Blocks .............................................................................. 0.10 mm (0.0039 in.)
Cylinder Bore
Cylinder Bore I.D.
New - CH18, CH20, CH22 (624 cc) ............................................................... 77.000/77.025 mm (3.0315/3.0325 in.)
New - CH22/23 (674 cc) ................................................................................. 80.000/80.025 mm (3.1496/3.1506 in.)
New - CH25, CH26, CH730-750 ................................................................... 82.988/83.013 mm (3.2672/3.2682 in.)
Max. Wear Limit - CH18, CH20, CH22 (624 cc) .......................................... 77.063 mm (3.0340 in.)
Max. Wear Limit - CH22/23 (674 cc) ............................................................ 80.065 mm (3.1522 in.)
Max. Wear Limit - CH25, CH26, CH730-750 .............................................. 83.051 mm (3.2697 in.)
Max. Out-of-Round ........................................................................................ 0.12 mm (0.0047 in.)
Max. Taper ....................................................................................................... 0.05 mm (0.0020 in.)
Cylinder Head
Cylinder Head Fastener Torque
Hex Flange Nut - Torque in Two Stages ...................................................... first to 16.9 N·m (150 in. lb.)
finally to 33.9 N·m (300 in. lb.)
Head Bolt - Torque in Two Stages ................................................................ first to 22.6 N·m (200 in. lb.)
finally to 41.8 N·m (370 in. lb.)
Max. Out-of-Flatness.............................................................................................. 0.076 mm (0.003 in.)
Rocker Arm Screw Torque .................................................................................... 11.3 N·m (100 in. lb.)
Fan/Flywheel
Fan Fastener Torque ............................................................................................... 9.9 N·m (88 in. lb.)
Flywheel Retaining Screw Torque ....................................................................... 66.4 N·m (49 ft. lb.)
Governor
Governor Cross Shaft-to-Crankcase Running Clearance
6 mm Shaft............................................................................................................. 0.013/0.075 mm (0.0005/0.0030 in.)
8 mm Shaft............................................................................................................. 0.025/0.126 mm (0.0009/0.0049 in.)
Governor Cross Shaft O.D.
6 mm Shaft
New .................................................................................................................. 5.975/6.012 mm (0.2352/0.2367 in.)
Max. Wear Limit ............................................................................................. 5.962 mm (0.2347 in.)
8 mm Shaft
New .................................................................................................................. 7.949/8.000 mm (0.3129/0.3149 in.)
Max. Wear Limit ............................................................................................. 7.936 mm (0.3124 in.)
Governor Gear Shaft-to-Governor Gear Running Clearance ......................... 0.015/0.140 mm (0.0006/0.0055 in.)
Governor Gear Shaft O.D.
New .................................................................................................................. 5.990/6.000 mm (0.2358/0.2362 in.)
Max. Wear Limit ............................................................................................. 5.977 mm (0.2353 in.)
Governor Lever Nut Torque ................................................................................. 6.8 N·m (60 in. lb.)