It seem its warrantry excludes most things you do with a winch too:
Parts not covered by warranty
1. Damage caused by unreasonable use, including failure to provide reasonable and necessary maintenance
2. Any part used in competitive racing, off road and/or used commercially or rented.
3. Defects caused by alterations or modifications, accidents or failure to follow the instructions in the instruction manual.
4. Normal wearing parts such as cables, clutches and switches, which are subject to replacement dependant on normal wear and tear or require replacement in connection with normal maintenance.