New England Trawler Equipment Co Capstan-Windlass Manual.pdf

This is an instruction manual for the Capstan-Windlass Power Unit Model X-1623, a dual-unit system for shallow draft hopper dredges operated by the Philadelphia Corps of Engineers under Contract No. DACW61-77-C-0158. The system comprises two capstan-windlass units, each with a 24-inch diameter cast steel head mounted above a chain wildcat and keyed to a vertical shaft, driven by an internal gear assembly and powered by a dual 40-horsepower, 1800 RPM electric motor rated at 460 volts, 3-phase, 60 hertz. Each unit simultaneously lifts a 3,500-pound anchor from 60 fathoms depth using 1-9/16-inch stud link chain at an average speed of 30 feet per minute, with full scope chain capable of achieving 10 feet per minute payout speed.

The manual provides comprehensive operational, installation, maintenance, and troubleshooting guidance. Key operational instructions include engaging wildcat brakes and driving dogs via operating knobs, maintaining controlled lowering speeds without releasing brakes completely, and shutting down the power unit when not in use. Installation requires bolting capstan units to a 51-inch diameter foundation ring with twelve 1-1/4-inch ASTM-A354 Grade BC bolts and installing a separate brake stand. The hydraulic system uses mineral-based fluid from Dynapower's recommended list, with main hydraulic lines at least 1 inch inside diameter rated for 3,000 PSI operating pressure. Lubrication requires EP-90 gear oil in the internal gear drive, changed annually, and weekly greasing of multiple fittings with water-repellant grease. The manual includes detailed procedures for remote anchor drop with approximately 10-fathom increments controlled via pushbuttons, hydraulic pressure adjustment to 585 PSI at brake cylinders, system startup with air bleeding procedures, and automatic drop setup and adjustments. A spare parts list and electric motor data for the 40 HP unit are provided to support operational reliability.