11
13.0
Wear limits
13.1
Load chain wear limits
Carefully inspec
t
the entire load chain. As
illustrated in Figure 12, measure five consecutive
links with calipers to find the length, Compare the
results with the table in Figure 12. 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
.
Hoist
Capacity
5 Links Normal
(mm)
5 Links Limit
Replace if
≥
1/4 ton
2.36”
2.433”
1/2 ton
2.36”
2.433”
3/4 ton
3.54”
3.629”
1-1/2 ton
4.72”
4.838”
3 ton
5.91”
6.058”
6 ton
5.91”
6.058”
Figure 12
13.2
Hook wear limits (top and
bottom)
Replace the hook when “A” in Figure 13 is wider
than the “Throat Opening Limit” shown in the
accompanying table.
Never
heat treat the hook or attach anything to the
hook by welding.
Capacity
Standard
Throat
Opening
(A)
Throat
Opening
Limit
(A)
1/4 ton
1.40”
1.47”
1/2 ton
1.38”
1.45”
3/4 ton
1.46”
1.54”
1-1/2 ton
1.85”
1.95”
3 ton
2.46”
2.59”
6 ton
3.07”
3.23”
Figure 13
