mxu 400 Werkstatthandbuch : Seite 49

                                                             CC127D                                                 ATV-1068A
 2. Wash the cylinder in parts-cleaning solvent.
                                                            Measuring Camshaft Runout
 3. Inspect the cylinder for pitting, scoring, scuffing,
    and corrosion. If marks are found, repair the sur-       NOTE: If the camshaft is out of tolerance, it must
    face using a ball hone.                                 be replaced.
  NOTE: To produce the proper 60° cross-hatch
                                                             1. Place the camshaft on a set of V blocks; then posi-
pattern, use a low RPM drill (600 RPM) at the rate              tion the dial indicator contact point against the
of 30 strokes per minute. If honing oil is not avail-
able, use a lightweight petroleum-based oil. Thor-
                                                                shaft and zero the indicator.                         3
oughly clean cylinder after honing using soap and
hot water. Dry with compressed air; then immedi-
ately apply oil to the cylinder bore. If the bore is
severely damaged or gouged, replace the cylinder.




                                                                                                            CC283D
                                                             2. Rotate the camshaft and note runout; maximum
                                                                tolerance must not exceed specifications.
                                                            Measuring Camshaft Lobe Height
                                                   CC390D
 4. If any measurement exceeds the limit, bore the           1. Using a calipers, measure each cam lobe height.
    cylinder and install an oversized piston or replace
    the cylinder.
  NOTE: Oversized piston and rings are available.
The oversized piston and rings are marked for
identification.




                                                                                                           ATV1013A
                                                             2. The lobe heights must not exceed minimum speci-
                                                                fications.



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