| Symptom | Manual Solution | Part Reference | | :--- | :--- | :--- | | | Hydraulic oil low or piston o-ring failed. Requires Hilti service center repair. | Section 8.4 | | Green LED flashing | Service indicator: Carbon brushes worn to 40% life. Replacement needed (Part #214471). | Section 10.2 | | Chisel falls out of chuck | TE-Y locking sleeve worn or dust ingress. Clean with Hilti grease (special lubricant, not standard grease). | Section 6.1 | | Excessive vibration | Broken internal spring in AVR system. Stop use immediately. | Safety Alert p.12 |

The Hilti TE 55 is a high-impact rotary hammer drill engineered for heavy-duty drilling and chiseling in concrete and masonry. While "exclusive" is not a standard part of the model name, it often refers to premium kit versions that include an extensive range of SDS Max accessories.

Do not rely on third-party sketchy websites. Hilti has moved to a centralized digital library. Here is the legitimate path to access your :

If you have a TE 55 produced between 1998 and 2005, the manual includes a unique "Repair Log" page in the back. This physical page allowed service centers to stamp service dates before digital tracking existed.