Broderson IC-20-1K, Руководство по эксплуатации и обслуживанию, Страница: 28 / 65

2-14
SHEAVE BLOCK AND DOWNHAUL WEIGHT
The capacity chart shows the approved hoist rope arrangements. The downhaul weight
and sheave blocks supplied by Broderson are specially designed to operate the Anti-
Two-Block system. Other blocks or downhauls may bypass this system and create a
dangerous condition. Notice the load limit for each hoist rope arrangement.
The keeper pins that pass through the sheave plates must be locked in place with
cotters to hold the line on the sheaves. The load line must pass through the center of
the downhaul, through the wedge socket, and the dead end clamped in the block, as
shown in the figure below.
When resting the downhaul or sheave block on the ground for changing it, use the
following procedure to prevent fouling the load line on the hoist. Raise the boom about 5
feet (1.5 m) and lower the hoist until the hook nearly touches the ground. Then lay the
hook on the ground by lowering the boom, not the hoist.