Chapter 3 Engine Section 4 Inspection and maintenance of engine componenets
3—32
Increase the ring
Increase the piston rings
Use the enlarged piston ring below.
As Fig. 3.4.59
It bears the following label.
Piston rings 1 and 2：0．50mm：50
1． 0mm：100
Increase the oil ring
Use the enlarging ring below.
It bears the following markings.
Oil ring 0.5mm: red paint
1.0mm: Yellow
Enlarge side moving plate
Measure the outside diameter and mark the side.
Pin hole
Use an inside micrometer to measure the inside
diameter of the piston pin hole, and use a micrometer to
measure the outside diameter of the piston pin.
If either exceeds the specified requirements, or the
difference between the two measurements is greater than
the limit, the piston and piston pin should be replaced.
As in Fig.3.4.60、3.4.61
Tools: inside micrometer
Micrometer (0-25mm)
Use limit
The piston pin hole：φ
008.0
002.0
14
mm
Outer diameter of piston pin：φ
0
004.0
14
mm
Fig.3.4.59
Fig.3.4.60
Fig.3.4.61
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