Joyner JNSZ1600QL, Owner'S Manual

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64
* 480M piston should be applied on 480E engine
——Measure the diameter. of the hole of piston pin Unit
：
mm
480
diameter of the piston
pin hole
White 20.630—20.633
Red 20.633—20.636
Blue 20.636—20.639
——Measure the diameter of piston pin Unit
：
mm
480
diameter of the piston
pin hole
White 20.622—20.625
Red 20.625—20.628
Blue 20.628—20.631
Fig.77
——Measure cotter intermission of piston ring First compression ring 0.30—0.50mm Second compression
ring 0.30—0.50mm Steel combination oil ring 0.40—1.40mm
——Measure the piston ring end play in the piston groove
Unit
：
mm
Piston ring
height Piston ring
groove size
Fit clearance
First compression
ring 1.60
0 -0.012
1.6
+0.06
+0.04
0.050—0.082
Second track
compression ring 2.0
0 -0.012
2.0
+0.06
+0.04
0.050—0.082
Oil control ring
blade Oil control
ring
0.61
±
0.025
4.0
+0.03
0.01
0.01—0.23
2.68
±
0.05
Cast iron oil
control ring 4.0
-0.015
-0.025
4.0
+0.03
+0.01
0.025—0.055