Section II. Description and data
The CONMACO Model 270 Winch (Fig. 1-2 and 1-3) is a 20-ton double drum diesel engine driven with
winchhead drums. It consists of a winch power unit and the winch mechanism mounted on a skid base.
The winch mechanism is driven by the diesel engine through a torque converter and multiple strand chain.
Engine. The winch is equipped with 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 constructed of steel with cast steel drums. The main drive shaft and two drum
shafts run on tapered roller bearings.
The two drums are engaged by an air actuated clutch and are equipped with air operated brakes.
Identification and tabulated data
Identification. The double drum winch has three major identification plates. The information contained on these
plates is listed below.
End Item Identification Plate. Located on the left hand side of the winch below the front drum axle.
Engine Identification plate. Attached to the engine rocker arm cover. It specifies engine model number,
engine serial number, and other optional equipment installed on the engine. The engine model number is also stamped
on the right hand side of the cylinder block on the upper rear corner.
Torque Converter Identification Plate. Located on the top of the torque converter. It specifies the
manufacturer, model number, serial number, and part number.
Tabulated Data. ("Type No." refers to Detroit Diesel Engine data plate numbers. )