1-4. The Hoist Unit is a manually operated portable device which provides a lifting capability of 1000
pounds. General specifications of the unit are listed below:
1-5. The unit consists of a metal frame containing the winch mechanism, supported by four telescoping
legs. (See figure 2). A square drum shaft is mounted between the ends of the frame, on bronze bushings.
A cable drum on the square shaft is mounted on ball bearing rollers so that it may be positioned at any
point along the square shaft. The cable drum is wound with 100 inches of 1/4 inch wire rope, with a cable
hook swaged on the free end, providing a means for engaging the load.
1-6. Operation of the unit is accomplished by turning a crankshaft which protrudes through the top of
the end cover. This crankshaft terminates in a hexagon shape where a box-end wrench or other tool may
be engaged to turn the shaft. The crankshaft drives the drum shaft through a worm gear and wheel
arrangement, with a gear reduction of 29:1 (29 full turns of the crankshaft = 1 full revolution of cable