Hitachi 310-123 Spare Part - Transatory Unit

Hitachi 310-123 — Transatory unit (original Hitachi replacement)

Description:

This is the Hitachi part number 310-123 listed in Hitachi parts diagrams as the "Transatory unit." It’s an internal handle-area assembly component shown in the parts lists alongside the handle damper (310-124) and handle packing, so it’s intended for use inside the handle/assembly of Hitachi hammers and rotary-hammers.

What you’ll get:

- Correct Hitachi part number: 310-123 (sold as the single transatory unit).

- The unit is supplied as the complete small assembly referenced in Hitachi parts diagrams (no external fittings or unrelated hardware included).

Example models this part fits (examples taken from spare parts diagrams and parts lists):

- H45MA / H45MR series.

- H60MA / H60MB / H60KA / H60MRV series.

- DH40MRY (rotary-hammer) and similar H‑series units where 310-123 appears in the parts diagram.

Notes for repair:

- Confirm the part number printed in your tool’s parts diagram or on its service sheet before ordering to ensure fit. The 310-123 entry consistently appears next to handle damper/packing items in parts diagrams, confirming its location in the handle/assembly section.