Daewoo D50S-2 Service Manual page 50

2.3.10. Piston
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Selection of Piston Grade
Correctly selected pistion grade to operate engine
efficiently.
Meassure the bore after assembling the cylinder
liner.
Determine piston grade after assembling liner.
• Measurement of Cylinder Liner Bore
1) To be measured at 2 points.
Cylinder Liner Bore Measuring Point (1) : 20mm
Cylinder Liner Bore Measuring Point (2) : 105mm
2) Measure cylinder liner bore from (1), (2) & (3)
measuring point toward X-X, Y-Y, W-W, Z-Z in
2.3.9. section.
3) Average value for 8 measurements.
grade combination.
Otherwise, It will be resulted a seizure.
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Outside Diameter of Piston
1) Piston outside diameter vary depending on the
piston type to be used.
2) Measure the piston outside diameter. (see figure)
(2) : 82mm
3) Piston Grade
Grade
A
B
Cylinder Liner Bore and Piston Clearance :
0.053~0.077 mm
clearances are preset. However, the clylinder
liner installation procedure may result in
slight decrease in the cylinder liner bore
clearances.
Correctly combinate piston after measuring
the cylinder liner bore clearance.
Limit of Cylinder Liner Bore
102.021-102.060 mm
It is most important to correctly
101.955-101.974 mm
101.975-101.994 mm
The cylinder liner piston kit
Limit
- 46 -
EJM2077I
EJM2078I
EJM2079S
1
2
Steel
Strut