Sailboats depend on human power to perform such tasks as sail trimming, rig adjustment, steering and sail changing, a wide variety of mechanical devices have evolved to allow relatively weak people to control highly-loaded systems. Block and tackles, hydraulics, and winches are the most common devices to magnify "people power."
Harken Hydraulic allow crew to trim any size sail with the push of a button. Choices include 2- and 3-speeds, and self-tailing, with shaped or sandblasted grips, and standard or wide drums. Available in aluminum, chrome, aluminum/stainless, stainless steel, or bronze.
Harken Service Kits at least once during the preseason. However, twice a season is best if your boat lives in salt water. If you race your boat hard, you may want to maintain your winches before every regatta. Keep your winches clean and operating smoothly by flushing frequently with fresh water. Check pawls and springs, bearings, gears, and spindles for signs of wear and corrosion.