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Ball Bearing, Needle Bearing, And Oil Seal; Ball And Needle Bearing Wear; Oil Seal Inspection - Kawasaki ZR-7S Service Manual

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7-34
CRANKSHAFTITRANSMISSION
Ball Bearing, Needle Bearing, and Oil Seal
Ball and Needle Bearing Wear
CAUTION
Do not remove the ball bearings for inspection. Re-
moval may damage them.
.
Check the ball bearings.
OSince 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.
OSpin [A]the bearing by hand to check its condition.
* Ifthe bearing is noisy, does not spin smoothly, or has any
rough spots, replace it.
.
Check the needle bearings.
OThe rollers in a needle bearing normally wear very little,
and wear is difficultto measure. Instead of measuring,
inspect the bearing for abrasion, color change, or other
damage.
*
Ifthere is any doubt as to the condition of a needle bear-
ing, replace it.
Oil Seal Inspection
. Inspect the oil seal.
OReplace itifthe lips are misshapen, discolored (indicating
that the rubber has deteriorated), hardened or otherwise
damaged.
GI130149S1
C

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