Kohler COMMAND CH18-745 - Cylinder Bore Specifications

1.10
Section 1
Safety and General Information
Closure Plate
Closure Plate Fastener Torque .............................................................. 24.4 N·m (216 in. lb.)
Crankshaft
End Play (Free) .................................................................................... 0.070/0.590 mm (0.0028/0.0230 in.)
End Play (With Thrust Bearing Components) ....................................... 0.070/0.270 mm (0.0028/0.0100 in.)
Except CH25 Engines Below Serial No. 2403500008 .................... 0.050/0.750 mm (0.0020/0.0295 in.)
Crankshaft Bore (In Crankcase)
New................................................................................................ 40.965/41.003 mm (1.6128/1.6143 in.)
Max. Wear Limit ............................................................................. 41.016 mm (1.6148 in.)
Crankshaft to Sleeve Bearing (Crankcase)
Running Clearance - New................................................................ 0.03/0.09 mm (0.0012/0.0035 in.)
Crankshaft Bore (In Closure Plate) - New .............................................. 40.987/40.974 mm (1.6136/1.6131 in.)
Crankshaft Bore (In Closure Plate)-to-Crankshaft
Running Clearance - New .............................................................. 0.039/0.074 mm (0.0015/0.0029 in.)
Flywheel End Main Bearing Journal
O.D. - New ..................................................................................... 40.913/40.935 mm (1.6107/1.6116 in.)
O.D. - Max. Wear Limit .................................................................. 40.84 mm (1.608 in.)
Max. Taper ..................................................................................... 0.022 mm (0.0009 in.)
Max. Out-of-Round ........................................................................ 0.025 mm (0.0010 in.)
Closure Plate End Main Bearing Journal
O.D. - New ..................................................................................... 40.913/40.935 mm (1.6107/1.6116 in.)
O.D. - Max. Wear Limit .................................................................. 40.84 mm (1.608 in.)
Max. Taper ..................................................................................... 0.022 mm (0.0009 in.)
Max. Out-of-Round ........................................................................ 0.025 mm (0.0010 in.)
Connecting Rod Journal
O.D. - New ..................................................................................... 35.955/35.973 mm (1.4156/1.4163 in.)
O.D. - Max. Wear Limit .................................................................. 35.94 mm (1.415 in.)
Max. Taper ..................................................................................... 0.018 mm (0.0007 in.)
Max. Out-of-Round ........................................................................ 0.025 mm (0.0010 in.)
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, CH730-745 .................................................... 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, CH730-745.................................. 83.051 mm (3.2697 in.)
Max. Out-of-Round ........................................................................ 0.12 mm (0.0047 in.)
Max. Taper ..................................................................................... 0.05 mm (0.0020 in.)