Original Bosch 1617000A4L — Wear-and-tear service kit for GBH 5‑40 DCE rotary hammers. This kit contains the parts you need to return a worn GBH 5‑40 DCE to serviceable condition: a pair of replacement carbon motor brushes, a protective dust cap, and a set of O‑rings/seals and small wear items used around the chuck/hammer mechanism. These components stop brush arcing, restore correct brush spring pressure, and replace leaking seals so the tool runs cooler and keeps lubricant inside the gearbox/hammer circuit.

The kit is sold as an original Bosch wear-and-tear/service part and is listed under the part-number variants 1617000A4L (also shown as 1 617 000 A4L / 1.617.000.A4L). It’s intended specifically for Bosch GBH 5‑40 DCE models (check your tool’s full 10‑character type number on the nameplate to confirm compatibility).

Service notes included with the kit: Bosch recommends re‑lubricating the listed O‑ring areas with a light mineral oil (20W) and greasing the blocker/ locking points with Bosch grease (ref. 1 615 430 015) during reassembly — following those lubrication steps prevents premature wear after you replace the brushes and seals. Use this kit when brushes measure out of spec, the tool smokes, sparks excessively, loses hammer action, or begins to leak lubricant.

If you’re repairing a GBH 5‑40 DCE, this genuine Bosch service kit supplies the exact wear parts you’ll replace most often to restore reliable performance and extend the tool’s service life.