---
publication_id: "OT-2026-000002545"
title: "A base for supporting a portable crane and a method for removing a main bearing of a wind turbine"
published_at: "2026-09-15T19:13:45.847010Z"
canonical_url: "https://opentechnical.org/p/OT-2026-000002545"
categories:
  - "lifting-positioning-manipulation/hoists-and-cranes"
keywords:
  - "b66c23/207"
  - "b66c23/207"
  - "b66c23/207"
  - "b66c23/207"
  - "b66c23/207"
  - "b66c23/207"
---

# A base for supporting a portable crane and a method for removing a main bearing of a wind turbine

## Abstract

A base (100) for supporting a portable crane for handling components of a wind turbine. The base (100) is mountable on the wind turbine, and configured to be switched between a first configuration and a second configuration. In the first configuration the base (100) is configured for being supported by a main bearing of the wind turbine. In the second configuration the base (100) is configured for being supported by a bed plate of a nacelle of the wind turbine. The base is configured for supporting the portable crane while switching between the first configuration and the second configuration. A method for removing a main bearing of a wind turbine is also disclosed.