MAINTENANCE MANUAL OF ENGINE
57
4.3 Installing the piston connecting rod assembly
4.3.1 Installing the piston ring
First gaseous ring (opening clearance: 0.35-0.5mm)
Second gaseous ring (opening clearance:
0.25-0.45mm)
Oil ring component (opening clearance:
0.25-0.45mm)
Attention: detect the opening clearance of piston
ring in standard cylinder liner.
1. Install spring A of oil ring into ring groove.
A-Spring of oil ring
Opening direction of all rings shall be installed in
stagger. To avoid combustible mixed gas leaking
from the opening clearance of piston ring. Opening
direction of all gaseous rings shall be staggered by
90~120° during assembly;
2. Install oil ring, second gaseous ring, first gaseous
ring by special tool.
A-Oil ring
B-Second gaseous ring
C-First gaseous ring
D-Special tool
Attention: When installing piston rod, appropriate
tool shall be selected, or it may damage the piston
ring or piston surface.
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