Connecting Rods - Kohler Command PRO CV732 Service Manual

Install New Piston Rings
Piston Ring Orientation
F
A
10°
10°
B
Top Oil Ring Rail
A
Gap
Intermediate Ring
C
Gap
E
Top Ring Gap
NOTE: Rings must be installed correctly. Ring
installation instructions are usually included with
new ring sets. Follow instructions carefully. Use
a piston ring expander to install rings. Install
bottom (oil control) ring first and top
compression ring last.
To install new piston rings, proceed as follows:
1. Oil control ring (bottom groove): Install expander and
then rails. Make sure ends of expander are not
overlapped.
2. Middle compression ring (center groove): Install
center ring using a piston ring installation tool. Make
sure identification mark is up or colored dye stripe
(if contained), is to left of end gap.
3. Top compression ring (top groove): Install top ring
using a piston ring expander. Make sure
identification mark is up or colored dye stripe
(if contained), is to left of end gap.
24 690 37 Rev. B
E
D
C
Bottom Oil Ring Rail
B
Gap
Oil Ring Expander
D
Gap
F
FLY Stamp
KohlerEngines.com
Disassembly/Inspection and Service

Connecting Rods

Offset, stepped-cap connecting rods are used in all
these engines.
Inspection and Service
Check bearing area (big end) for excessive wear,
score marks, running and side clearances (refer to
Specifications). Replace rod and cap if scored or
excessively worn.
Service replacement connecting rods are available in
STD crankpin size and 0.25 mm (0.010 in.) undersize.
Undersized rods have an identification marking on lower
end of rod shank. Always refer to appropriate parts
information to ensure correct replacements are used.
Remove Crankshaft
Inspection and Service
Crankshaft Components and Detail
A
Self-Tapping Screw
C Plug
G
E
Fillet Must Blend Smoothly with Bearing Journal
E
F High Point from Fillet Intersections
G
H
This Fillet Area Must Be Completely Smooth
NOTE: If crankpin is reground, visually check to insure
fillet blends smoothly with crankpin surface.
NOTE: To prevent repeat failures, camshaft and
crankshaft should always be replaced as a set.
Carefully pull crankshaft from crankcase.
A
B
C
D
B
Flat Washer
D Crankshaft
F
H
Surface
45° Minimum
51