Putzmeister Spare Parts BUSH 028550008

This bush, part number 028550008, is a direct OEM replacement for specific Putzmeister concrete pump S-valve assemblies . The dimensions read 95mm outer diameter, 90mm inner diameter, and 60mm in length.

It's a DU-B type bearing, characterized by its composite construction with a sintered bronze layer and a PTFE overlay. This design provides low-friction operation and high wear resistance where the S-valve shaft pivots . The "groove" in the description refers to a lubrication channel.

You're looking at a wearing part that takes constant shock load and abrasion. Replacing it at the first sign of play is crucial; a worn bush throws off the S-valve timing, leads to seal failure, and can score the shaft itself.

This particular bush is used across a range of Putzmeister boom pumps, including BSF 24 through BSF 46 models, as well as units with .09H to .16H pumping systems . Double-check your machine's serial number to confirm fitment.

It's a manageable part to press in, but make sure the housing bore is clean and you've got a good driver tool. A light coat of oil on the outer shell helps prevent galling during installation. Keep the grease lines clear.