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4. Service Guide
4-8 Piston Inserting Direction
All Models
Make sure to point the recessed mark (arrow or
triangle) on the piston head to the exhaust (muffler)
side.
4-9 Piston Pin Snap Ring Assembly
End Gap Position
HB23 Series, HBZ26 Series, EB4300/ 6200, EB70 Series
Fit the snap ring in the piston’s groove firmly and position
the end gap of the snap ring below the piston.
・
・・
・
If the snap ring is poorly inserted or the end
gap of the snap ring is incorrectly
positioned, the snap ring may comes off
during engine operation resulting in
damage to the engine.
・
・・
・
Never reuse a snap ring. Always insert a
new one.
End Gap Position
EBZ4800, EBZ30/ 51/ 71/ 80 Series
Fit the snap ring in the groove firmly and position the end
gap of the snap ring opposite the notch.
・
・・
・
If the snap ring is poorly inserted or the end
gap of the snap ring is incorrectly
positioned, the snap ring may comes off
during engine operation resulting in
damage to the engine.
・
・・
・
Never reuse a snap ring. Always insert a
new one.
Check After Installation
All Models
After the snap ring is installed, check that it fits firmly
in the correct direction.
Turn the snap ring using thin tipped tool and
check that it moves smoothly in its groove.
If the snap ring is improperly installed, it will
not move smoothly in its groove.
CAUTION
CAUTION
Notch
End Gap
Snap Ring
Notch
End Gap
Snap Ring
Piston Pin
Groove
Snap Ring
Snap Ring
REFERENCE
【
【【
【
Exhaust Side
】
】】
】
Triangle Mark
Arrow Mark
【
【【
【
Exhaust Side
】
】】
】
