Kohler COMMAND CH18-CH26, Service Manual

Page: 15 / 246

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/CH620,CH20/CH640,CH22 (624 cc) ...................................................77.000/77.025 mm (3.0315/3.0325 in.)
CH22/CH670,CH23/CH680 (674 cc) ..............................................................80.000/80.025 mm (3.1496/3.1506 in.)
CH25,CH26/CH735,CH730,CH740,CH745,CH750 .....................................82.988/83.013 mm (3.2672/3.2682 in.)
Max. Wear Limit-CH18/CH620,CH20/CH640,CH22 (624 cc) ....................77.063 mm (3.0340 in.)
Max. Wear Limit-CH22/CH670,CH23/CH680 (674 cc) ...............................80.065 mm (3.1522 in.)
Max. Wear Limit-CH25,CH26/CH735,CH730,CH740,CH745,CH750 ......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.)