Jet JLH series Operating Instructions And Parts Manual

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Contents

10Allowable Limits for Load Chain and HooksLoad ChainCarefully inspect the entire load chain. Asillustrated in Figure 8, measure five consecutivelinks with calipers to find the length, Compare theresults with the table in Figure 8. Check everythree feet and especially where excessive wear isindicated. Any load chain that shows noticeabledeformation or heat influence must be replacedwith a new one.Never extend load chain bywelding a second piece to the original.HoistCapacity5 Links Normal(mm)5 Links LimitReplace if ≥0.25 ton 45 46.30.5 ton 60 61.8Figure 8Hooks (Top and Bottom)Replace the hook when the distance betweenindicator points – “A” in Figure 9 – is wider than thelimits given in the table.Never heat treat the hook or attach anything to thehook by welding.HoistCapacity“A” DimensionNormal(mm)“A” DimensionReplace if ≥0.25 ton 35.5 37.30.5 ton 41 43.1Figure 9