Bendix 289438N Compressor Piston TF400 Assembly

Bendix 289438N Compressor Piston TF400 Assembly is a two-piston kit designed for Bendix Tu-Flo 400 (TF-400) air compressors. The assembly includes two Bendix 289438N pistons, part numbers that Bendix catalogs list as the standard TF-400 piston size, making this a direct match for TF-400 replacement work. The TF-400 family refers to Bendix’s two-piston, pulley-drive air compressors used in legacy Bendix air-brake systems, and the 289438N designation identifies the standard-size piston used in those units. This two-piston pack is intended for replacement of both cylinders in TF-400 configurations, providing matched components to restore proper compression and consistent sealing when installed with the corresponding TF-400 hardware and rings as specified by Bendix maintenance references. Designed for technicians performing TF-400 piston service, this assembly offers a straightforward path to bring a TF-400 compressor back to spec with two identical pistons ready for install.