Original Makita crank cap cover — part 318170-4 — direct-fit replacement for the HR4511C SDS‑Max rotary hammer. Designed to seal and protect the crank/gear area from dust, debris and impact, it restores the correct alignment and lubrication of the crank assembly so the hammer runs smoothly.
Key details:
- Part number: 318170-4 (original Makita crank cap cover).
- Typical construction: robust metal alloy with a finished surface for jobsite durability and impact resistance.
- Function: dust/debris protection and support for the crank area to help prevent premature wear of bearings and seals.
- Fits (example model): Makita HR4511C rotary hammer.
Simple like‑for‑like replacement — sold as the single cover part to get your Makita back to proper operation.
Jump straight to the Makita spare parts diagrams:
Browse our full range of Makita hammer drill parts.
