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Inner Axle Seal

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With the ball ground to allow entry of the Birfield, and then cleaned, it was time to install the inner axle seal and new felt seals for the backside of the knuckle. It’s a good idea to check the ball for excessive rust pitting on the exterior surface. We’ve seen badly pitted ones restored to smoothness using J-B Weld or similar fillers. New knuckle bearing races were tapped into the balls using a brass drift.

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