Connecting Rods/Piston/Breather Components; Piston And Rings; Piston And Rings Components And Details; Remove Connecting Rods With Pistons And Rings - Kohler Courage SV710 Service Manual

Disassembly/Inspection and Service

Connecting Rods/Piston/Breather Components

J
A Piston Ring Set
C Piston (Style A)
E Connecting Rod
G Breather Filter
Inner Breather
I
Cover
K Piston (Style B)

Remove Connecting Rods with Pistons and Rings

NOTE: If a carbon ridge is present at top of either
cylinder bore, use a ridge reamer tool to remove
it before attempting to remove piston.
NOTE: Cylinders are numbered on crankcase. Use
numbers to mark each end cap, connecting rod
and piston for reassembly. Do not mix end caps
and connecting rods.
1. Remove screws securing closest connecting rod end
cap. Remove end cap.
2. Carefully remove connecting rod and piston
assembly from cylinder bore.
3. Repeat above procedure for other connecting rod
and piston assembly.
Connecting Rods
Offset, stepped-cap connecting rods are used in all
these engines.
64
B
C
A
D
B
F
E
G
H
I
B Piston Pin Retainer
D Piston Pin
Connecting Rod
F
End Cap
Breather Cover
H
Gasket
J Oil Seal
KohlerEngines.com
Inspection and Service
Check bearing area (big end) for excessive wear, score
marks, running and side clearances (See Specifi cations).
K
Replace rod and cap if scored or excessively worn.
Service replacement connecting rods are available in
STD size and 0.25 mm (0.010 in.) undersize. Undersized
rods, 0.25 mm (0.010 in.), have an identifi cation marking
on lower end of rod shank. Always refer to appropriate
parts information to ensure correct replacements are
used.

Piston and Rings

Inspection

Piston and Rings Components and Details

A
Style A
A Piston Ring
C Identifi cation Mark
Top Compression
E
Ring
G Rails
Oil Control Ring
I
(3 Piece)
Scuffi ng and scoring of pistons and cylinder walls occurs
when internal engine temperatures approach welding
point of piston. Temperatures high enough to do this are
created by friction, which is usually attributed to improper
lubrication and/or overheating of engine.
Normally, very little wear takes place in piston boss-
piston pin area. If original piston and connecting rod can
be reused after new rings are installed, original pin can
also be reused but new piston pin retainers are required.
A piston pin is included as part of piston assembly – if
pin boss in piston or pin are worn or damaged, a new
piston assembly is required.
B
C
D
D
E
E
F
F
G
G
H
I
H
Style B
B End Gap
D Piston
Center
F
Compression Ring
H Expander
32 690 01 Rev. G