CHAPTER 18 DOUBLE DRUM WINCH PMCS
Section I. General
18-1 Introduction. Chapter 18 contains Preventive Maintenance Checks and Services for the Winch, Double Drum,
Diesel Engine Driven, 40,000 LB Capacity, CONMACO Model 27 which is used on the Reverse Osmosis Water
Purification Barge. Operating and maintenance procedures for the winch are described in detail in TM 55-1930-209-
14&P-21. TM 55-1930-209-14&P-21, Appendix C also contains complete Preventive Maintenance Checks and Services
for the Double Drum Winch.
18-2 Major components. The CONMAC Model 270 Winch is diesel engine driven with winched drums. It consists of a
winch power unit and the winch mechanism mounted on a skid base.
18-3 System description. The winch mechanism is driven by a Detroit Diesel, 4-71N series, Model 1043-7000, water
cooled diesel engine that develops 152 rated HP at 2100 RPM. The winch assembly is contructed of steel with cast iron
drums. The main drive shaft and 2 drums are run on tapered roller bearings. The drums are engaged by an air actuated
dutch and are equipped with air operated brakes. Refer to figures 18-1 and 18-2 for top and right side views of winch
Figure 18-1 . Winch Assembly Top View