Kohler Command PRO CH620-CH740 Owner's Manual page 85

Determining Camshaft End Play
1. Install shim removed during disassembly onto
camshaft.
2. Position camshaft end play checking tool on
camshaft.
3. Apply pressure on camshaft end play checking tool
(pushing camshaft toward crankshaft). Use a feeler
gauge to measure camshaft end play between shim
spacer and checking tool. Camshaft end play should
be 0.076/0.127 mm (0.003/0.005 in.).
4. If camshaft end play is not within specifi ed range,
remove checking tool and replace shim as
necessary.
Several color coded shims are available:
White: 0.69215/0.73025 mm (0.02725/0.02875 in.)
Blue: 0.74295/0.78105 mm (0.02925/0.03075 in.)
Red: 0.79375/0.83185 mm (0.03125/0.03275 in.)
Yellow: 0.84455/0.88265 mm (0.03325/0.03475 in.)
Green: 0.89535/0.99345 mm (0.03525/0.03675 in.)
Gray: 0.94615/0.98425 mm (0.03725/0.03875 in.)
Black: 0.99695/1.03505 mm (0.03925/0.04075 in.)
5. Reinstall end play checking tool and recheck end
play.
Oil Pump Assembly
Oil pump is mounted inside closure plate. If service was
required, and oil pump was removed, refer to
Disassembly/Inspection and Service.
Governor Gear Assembly
Governor gear assembly is located inside closure plate.
If service was required, and governor was removed,
refer to Disassembly/Inspection and Service.
24 690 06 Rev. K
Thrust Bearing, Washer and Shim
Thrust Bearing, Washer, and Shim Sequence
A Thrust Shim
Needle Thrust
C
E Closure Plate
Some specifi cations use a needle type thrust bearing,
thrust washer and shim spacer to control end play of
crankshaft. If these items are noted during disassembly,
make sure they are reinstalled in sequence shown. A
different procedure will have to be followed to check and
adjust crankshaft end play on these models.
Race for thrust bearing presses loosely into closure
plate. If it is not already installed, push it into crankshaft
bore inside closure plate. Pack thrust bearing with heavy
grease and stick bearing into race. Wipe some grease
on face of thrust washer and stick it onto thrust bearing.
Wipe some grease on face of original shim spacer and
stick it onto thrust washer.
Install closure plate onto crankcase without applying
RTV sealant and secure it with only two or three
fasteners at this time. Use a dial indicator to check
crankshaft end play. End play should be 0.070/1.190 mm
(0.0028/0.0468 in.), except for CH25 engines below
Serial No. 2403500008 end play should be
0.050/0.75 mm (0.0020/0.0295 in.). Shim spacers are
available in three color coded thicknesses listed below if
adjustment is needed.
Crankshaft End Play Shims
Green: 0.8366-0.9127 mm
(0.8750 mm/0.034 in. Nominal)
Yellow: 1.0652-1.1414 mm
(1.1033 mm/0.043 in. Nominal)
Red: 1.2938-1.3700 mm
(1.3319 mm/0.052 in. Nominal)
KohlerEngines.com
A
B
C
D
B
D
Bearing
Reassembly
E
Thrust Washer
Bearing Race
77