Makita 453139-2 — Rack B (original Makita)

Replace the small but critical Rack B (part no. 453139-2) used inside Makita dust-extraction housings. This is the molded rack that engages the slide lever and compression spring to lock the collector/slide-pipe assembly in place; when the rack is cracked, worn, or missing the extractor’s slide/lock function can fail. The part is supplied as a single original Makita Rack B and installs into the collector/housing assembly alongside the slide lever and a small compression spring.

Compatibility (examples)

- Commonly used in Makita dust-extraction units and accessory housings such as DX01 / DX02 / DX03 / DX04 / DX05 / DX06 / DX07 / DX08 / DX09 and DX12 service/parts diagrams. Check your tool’s parts diagram to confirm placement.

Notes for fit and installation

- Intended to replace the factory Rack B inside the housing; it mates with the slide lever and a small compression spring (listed as Compression Spring 3 in the same assembly). Simple to fit when you remove the housing cover and the associated spring/lever—no modifications required when replacing like‑for‑like.

What you get

- One original Makita Rack B (453139-2), ready to drop into the housing as a direct replacement part.

If your dust-extractor housing is not locking or the slide lever feels loose or broken, replacing this rack restores the original locking action.