Briggs & Stratton 405777 Series Manual page 91

Piston, Rings And Connecting Rod
Inspection And Assembly
GENERAL INFORMATION
DISASSEMBLE PISTON AND CONNECTING ROD
CHECKING PISTON AND RINGS
CHECKING PISTON PIN AND CONNECTING ROD
ASSEMBLE PISTON AND CONNECTING ROD
ASSEMBLE PISTON RINGS TO PISTON
GENERAL INFORMATION
It is recommended that new piston rings be installed whenever the engine is disassembled for major servicing or overhaul, providing
that cylinder bores are within specification.
Remove any carbon or ridge at the top of the cylinder bore. This will prevent breaking the rings when removing the piston and
connecting rod from the engine. Remove the connecting rod cap. Push the piston and connecting rod out through the top of the
cylinder.
Measure cylinder bores before checking pistons and rings. See Section 10. If cylinder bore(s) require re-sizing it will not be
necessary to check pistons and rings since a new oversized piston assembly will be used.
If the cylinder bore is more than .08 mm (.003") oversize, or .04 mm (.0015") out of round, it must be resized.
DISASSEMBLE PISTON AND
CONNECTING ROD
1. Remove piston rings using ring expander, Tool
#19340, Fig. 1.
a. Then remove coil expander.
9905
Section 12
Section Contents
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TSM
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TOOL #19340
PISTON
Fig. 1 − Remove Rings
Page
1
1
2
3
3
4
1