Kohler LH630-775 Service Manual page 148

Section 11
Reassembly
The race for the thrust bearing presses loosely into
the closure plate. If it is not already installed, push it
into the crankshaft bore inside the closure plate. Pack
the thrust bearing with heavy grease and stick the
bearing into the race. Wipe some grease on the face of
the thrust washer and stick it onto the thrust bearing.
Wipe some grease on the face of the original shim and
stick it onto the thrust washer.
Install the closure plate onto the crankcase without
applying RTV sealant and secure it with only two or
three of the fasteners at this time. Use a dial indicator
to check the crankshaft end play. End play should be
0.070/0.590 mm (0.0027/0.0232 in.). Shims are
available in the five color-coded thicknesses listed
below if adjustment is needed.
Crankshaft End Play Shims
BLUE 0.48-0.52 mm
(0.050 mm Nominal) (0.019 in.)
BLACK 0.667-0.705 mm
(0.686 mm Nominal) (0.27 in.)
GREEN 0.8366-0.9127 mm
(0.8750 mm Nominal) (0.34 in.)
YELLOW 1.9652-1.1414 mm
(1.1033 mm Nominal) (0.043 in.)
RED 1.2938-1.3700 mm
(1.3319 mm Nominal) (0.052 in.)
Remove the closure plate. If end play requires
adjustment, remove the original shim and install the
appropriate size replacement.
Install Closure Plate Oil Seal
1. Check to make sure that there are no nicks or
burrs in the crankshaft bore of the closure plate.
2. Apply a light coat of engine oil to the outside
diameter of the oil seal.
3. Drive the oil seal into the closure plate using a
seal driver. Make sure the oil seal is installed
straight and true in bore to depth shown in
Figure 11-15.
11.6
Closure Plate
Seal Depth
Figure 11-15. Oil Seal Depth in Closure Plate.
Install Closure Plate Assembly
RTV silicone sealant is used as a gasket between the
closure plate and the crankcase. Refer to Section 2, of
this manual for a listing of approved sealants.
Always use fresh sealant. Using outdated sealant can
result in leakage.
1. Be sure the sealing surfaces have been cleaned
and prepared as described at the beginning of
Section 10 or in Service Bulletin 252.
2. Check to make sure that there are no nicks or
burrs on the sealing surfaces of the closure plate
or crankcase.
3. Apply a 1/16" bead of sealant to the sealing
surface of the closure plate. See Figure 11-16 for
sealant pattern.
Oil Seal
8.0 mm
(0.315 in.)