RECOVERY VEHICLE, FULL TRACKED: MEDIUM, M88A1
WINCHES, SPADE ASSEMBLY, AND HOISTING BOOM THEORY OF OPERATION
Winches, Spade Assembly, and Hoisting Boom
The main winch (1) is mounted to the nosepiece of the vehicle beneath the crew compartment. It is gear-driven by a hydraulic
motor and is used for heavy-duty recovery operations. The winch is wound with 200 ft (61.0 m) of 1-1/4 in. (31.8 mm) steel
cable. The cable is equipped with a clevis on the free end for securing it to loads.
The spade (2) is mounted to the vehicle nosepiece by two trunnion-mounted arms. The arms are operated by hydraulic cylinders
(3) from within the winch compartment. When not in use, the spade is secured in a raised position by a hydraulically activated,
spring-loaded spade lock.
Figure 1. Main Winch and Spade Assembly.