Century EB-4 Owner's Manual page 37

Section IV - OPERATING INSTRUCTIONS
4.5 BOOM EXTENSION
Extend boom to desired length by use of the BOOM "IN-OUT" Control.
Refer to Figure 3.2.
4.6 CABLE
(a) The boom end yoke swivels to allow pulls from either side. See
Figure 4.2.
(b) A snatch block may be used, during recovery operation, to reduce
line load and increase pulling capacity. The winch cable is then
anchored, in the ring, at the end of the boom. Refer to Figure
4.2.
(c) The standard snatch block may be used when a lower winching
angle is required for recovery operations. See Figure 4.3.
WRECKER (cont'd)
FIGURE 4.2
IV-3