59
Cast iron oil
4.0
-0.015
4.0
+0.03
control ring
-0.025
+0.01
* 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
Second track
compression ring
Oil control ring
1.60
0 -0.012
1.6
+0.06
+0.04
0.050—0.082
2.0
0 -0.012
2.0
+0.06
+0.04
0.050—0.082
blade Oil control
ring
0.61
±
0.025
4.0
+0.03
0.01
0.01—0.23
2.68
±
0.05
0.025—0.055
