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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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Ball Bearing, Needle Bearing, and Oil Seal
Ball and Needle Bearing Wear
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
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


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