An apparatus for impregnating a liquid sealant into the bore surface of a wheel hub or the like includes a sealant reservoir with an outlet line leading to the bore and a closed manifold leading from the bore. The manifold and outlet line communicate with the bore through openings in a work surface and a hydraulically actuated platen which together clamp the hub in place and seal off the ends of the bore. During impregnating, the reservoir is pressurized to force sealant through the outlet line into the bore and manifold, and air is trapped in the manifold and compressed until a desired system pressure is reached. After a suitable time, the pressure in the reservoir is released, and the trapped air expands to cause the sealant to move quickly back to the reservoir.
Method and apparatus for lubricating rotating bearing shafts. The lubricant is pumped under pressure into a first opening in the bearing housing located in front of the shaft bearing, until the lubricant reaches a second opening located behind the shaft bearing. Subsequently the lubricant is removed under suction.
