Broderson IC-35-2G, Руководство по эксплуатации и обслуживанию, Страница: 31 / 71

2-15
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.
For loads above 4,000 pounds (1815 kg) the sheave block must be used. The wedge
socket should be pinned to the boom sheave plates, as shown in the figure. The dead
end of the rope in the wedge socket should be clamped, as shown in the figure. The
clamp must not be used on the live part of the rope. This will seriously weaken the rope
by metal fatigue over a number of cycles. The sheave block should hang straight, and
the top of the block should meet the boom sheave plates squarely when pulled up
snugly.