Genuine Makita O‑ring 23 — part no. 213394‑6. A rubber sealing ring with a nominal diameter of 23 mm designed to restore the piston/crank sealing in Makita demolition and rotary hammers; supplied as a single replacement piece in the parts breakdown.
Fits a range of Makita demolition/rotary‑hammer models — for example: HM1213C, HM1205C, HM1202C, HM1203C, HM0860C, HM0870C, HR5001C, HR4501C and HR4511C — and is listed under the tool’s seal/piston components.
Simple to install in the tool’s seal groove to restore proper compression and hammer action; ideal when a worn or damaged seal is the cause of reduced performance or leakage.
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