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49
- English
Repair Instructions
Check the following:
• That the cylinder’s surface coating is not worn.
Especially the upper part of the cylinder.
• That the cylinder does not have any chafe or
cutting marks. See figure 60.
• That the piston is free of score marks. Minor
scratches can be polished off using fine emery
paper.
• That the piston ring is not burnt into its groove.
• Measure the wear on the piston rings. This
must not exceed 1 mm. See figure 61. Use the
piston to push the piston ring downward.
• That the gudgeon pin bearing is intact.
• That the intake bellows is intact.
Fig 61
Faults and causes
See Figure 62.
Score marks on the piston (A)
1 Leakage, check not carried out.
2 Too low octane fuel.
3 Too low or incorrect oil in the fuel.
Carbon build-up (B)
1 Too much or incorrect oil in the fuel.
Piston ring breakage
1 Piston ring worn out.
2 Oversized piston ring groove.
Fig 62
Fig 60
Cleaning and inspection of the cylinder
Clean all components, scrape off all gasket re-
mains and soot from the following areas:
• Piston crown
• Top of the cylinder bore (inside)
• Cylinder exhaust port
• Base of the cylinder and/or crankcase
Содержание GZ4350
Страница 1: ...Workshop Manual English GZ4350...
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Страница 5: ...English 4 Index...
Страница 12: ...11 English 11 12 9 4 Service tools Service tools 4 3 8 1 2 7 10 5 6 13 14 15 16 17...
Страница 15: ...English 14 Service data...
Страница 58: ...57 English Troubleshooting 8 Troubleshooting Contents 8 1 Troubleshooting 58 8 2 Troubleshooting methods 59...
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