mxu 400 Manuel atelier : Page 70

                                                           ATV-0104                                                  CC290D
                                                            2. Maximum diameter must not exceed specifica-
Correcting Tooth Contact                                       tions.
  NOTE: If tooth contact pattern is comparable to           Measuring Connecting Rod
the correct pattern illustration, no correction is          (Small End Deflection)
necessary.
                                                            1. Place the crankshaft on a set of V-blocks and
If tooth contact pattern is comparable to an incorrect         mount a dial indicator and base on the surface
pattern, correct tooth contact according to the follow-        plate. Position the indicator contact point against
ing chart.                                                     the center of the connecting rod small end journal.

       Tooth Contact             Shim Correction            2. Zero the indicator and push the small end of the
                                                               connecting rod away from the dial indicator.
Contacts at Top             Decrease Shim Thickness
Contacts at Root            Increase Shim Thickness         3. Maximum deflection must not exceed specifica-
                                                               tions.
  NOTE: To correct tooth contact, steps 1 and 2
(with NOTE) of "Correcting Backlash" must be fol-           Measuring Connecting Rod
lowed and the above "Tooth Contact/Shim Correc-             (Big End Side-to-Side)
tion" chart must be consulted.
                                                            1. Push the lower end of the connecting rod to one
                   ! CAUTION                                   side of the crankshaft journal.
After correcting tooth contact, backlash must again         2. Using a feeler gauge, measure the gap between the
be checked and corrected (if necessary). Continue              connecting rod and crankshaft journal.
the correcting backlash/correcting tooth contact
procedures until they are both within tolerance val-
ues.

CRANKSHAFT ASSEMBLY

Measuring Connecting Rod
(Small End Inside Diameter)

 1. Insert a snap gauge into the upper connecting rod
    small end bore; then remove the gauge and mea-
    sure it with micrometer.

                                                                                                           CC289D
                                                            3. Acceptable gap range must be within specifica-
                                                               tions.




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