Product Manual

18
17.0 Allowable limits
17.1 Hook wear limits (top and bottom)
Replace the hook when the A, B, or C measurements, as shown in Figure 16, reach the limit shown in the
tables below. Never heat-treat the hook or attach anything to the hook by welding.
NOTE: Excessive hook throat opening or twist indicates abuse or overloading of the hoist. If such deformation
is discovered, inspect the hoist, chain and all supporting members very carefully for additional indications of
excessive hoist loading.
Figure 16 Table 5
17.2 Chain wear limits
Carefully inspect the entire load chain. Measure eleven consecutive links with calipers in the manner shown in
Figure 17. Check every three feet and especially where excessive wear is indicated. Any load chain that shows
noticeable deformation or heat influence must be replaced with a new one. Never extend load chain by welding
a second piece to the original.
Figure 17
Table 6