Service Manual — page 388 of 715

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9-42 CRANKSHAFT/TRANSMISSION
Ball Bearing, Needle Bearing, and Oil Seal
Ball and Needle Bearing Replacement
                             NOTICE
    Do not remove the ball or needle bearings unless it
    is necessary. Removal may damage them.

• Using a press or puller, remove the ball bearing and/or
  needle bearings.
                               NOTE
    ○In the absence of the above mentioned tools, satisfac-
      tory results may be obtained by heating the case to ap-
      proximately 93°C (200°F) max., and tapping the bearing
      in or out.

                             NOTICE
    Do not heat the case with a torch. This will warp the
    case. Soak the case in oil and heat the oil.

• Using a press and the bearing driver set [A], install the
  new ball bearing until it stops at the bottom of its housing.
○The new needle bearings must be pressed into the
    crankcase so that the end is flush with the end of the
    hole.
    Special Tool - Bearing Driver Set: 57001-1129

Ball and Needle Bearing Wear Inspection
                             NOTICE
    Do not remove the bearings for inspection. Re-
    moval may damage them.

•○Check  the ball bearings.
  Since the ball bearings are made to extremely close toler-
    ances, the wear must be judged by feel rather than mea-
    surement. Clean each bearing in a high flash-point sol-
    vent, dry it (do not spin the bearing while it is dry), and oil
    it with engine oil.

○Spin [A] the bearing by hand to check its condition.
 If the bearing is noisy, does not spin smoothly, or has any
 rough spots, replace it.
•Check the needle bearings.
○The rollers in a needle bearing normally wear very little,
 and wear is difficult to measure. Instead of measuring,
 inspect the bearing for abrasion, color change, or other
 damage.
 If there is any doubt as to the condition of a needle bear-
 ing, replace it.
Oil Seal Inspection
• Inspect the oil seals.
  Replace it if the lips are misshapen, discolored (indicating
    that the rubber has deteriorated), hardened or otherwise
    damaged.