The chain plates should receive an annual inspection. The holes where the clevis pins are installed should be checked to be sure there has been no elongation. The chain plate covers should be removed to check for any electrolysis that may be occurring underneath them. If any cracking or fatiguing is detected, the chain pates should be replaced. Be sure to reinstall the chain plate covers with bedding material such as silicone RTV or Dolphinite to prevent leaking.
Winches require regular cleaning and oiling with a light weight lubricant on the pawls and springs.
Use a good quality grease on the gears and bearings. All lines especially in salt water should be soaked periodically in a bucket of fresh water to remove all salt. This will keep them more pliable. Keep your lines stored in a dry area to prevent mildewing. The ends should be properly whipped to prevent fraying.