Jacobsen SXG323, Руководство по обслуживанию

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CHAPTER 4. ENGINE
59
4
• Connecting-rod twist
Find the twist and parallelism between the big
end and small end of the connecting rod.
If either of the measured values exceeds the
specified value, replace the connecting rod.
Fig. 4-87
Fig. 4-88
3.3.5. ASSEMBLY OF PISTON AND CONNECT-
ING ROD
(1) Assembly of the piston and connecting rod
• Install a snap ring in one end of the piston pin
hole.
• Set the piston and the connecting rod so that the
front mark on the piston and "ISEKI" marking
on the connecting rod are turned in the same
direc- tion.
• Apply engine oil to the piston pin and push it
into the hole by hand.
Fig. 4-89
• Install the other snap ring securely in the groove.
Fig. 4-90
(2) Installation of piston rings
• Install the rings using a piston ring expander
with their "T" marks turned upwards. But the oil
rings have no markings, so they can be installed
with either side up.
Twist
Parallelism
Standard value
0.05 or less
0.05 or less
Usable limit
0.2 mm
0.15 mm