CRANES.

TM 9-2320-279-20-1

Vehicle

Operation

Systems

(Cont)

(fig. 1-18) A number of cranes are used on the M977 series vehicles. Refer to

o p e r a t o r ' s manuals for specifications, dimensions and operating procedures for the different crane models.

The cranes are completely hydraulic powered and their principles of operation are the same. Individual

control panel, boom and hydraulic cylinder arrangements, and lifting capacities are different. All cranes

are powered from the vehicle's hydraulic system. All are equipped with outriggers for stability during

operation. All cranes use a combination of hinged joints and telescoping members to give them their

m o t i o n s . The hydraulic-powered hoisting winch has an automatic brake to prevent accidental lowering of

the load.

Cranes