mxu 500 irs 1 Manuel atelier : Page 177

Microfiches
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Page 176

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Page 179

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          9. CYLINDER/PISTON                                 MXU 500 IRS


 Spread each piston ring and remove it by
 lifting up at a point opposite the gap
 Do not damage the piston ring by
   spreading the ends too far.


 Clean carbon deposits from the piston ring
 grooves.




 INSPECTION

 Piston ring

 Inspect the piston rings for movement by
 rotating the rings. The rings should be able to
 move in their grooves without catching.

 Push the ring until the outer surface of the
 piston ring is nearly flush with the piston and
 measure the ring-to-groove clearance.

 Service Limits:
                   Top: 0.08 mm (0.003 in)
                   2nd: 0.065 mm (0.0026 in)


 Insert each piston ring into the bottom of the
 cylinder squarely.
 Use the piston head to push each piston
   ring into the cylinder.

 Measure the piston ring end gap.

 Service Limit:
                   Top: 0.5 mm (0.02 in)
                   2nd: 0.65 mm (0.026 in)
                   Oil ring: 1 mm (0.04 in)

                                                          9-4