JET 211500 Use and Care Manual download pdf (Page 18)

Inspection Procedures: Allowable Limits

Load Chain

Carefully inspect the entire load chain. Measure

five consecutive links with calipers in the manner

shown in Figure 21. 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.

Capacity

Load

Chain

5 Links

Normal

5 Links

Limit

1/2 ton 6.3x19mm 3.74” 3.8”

1 ton 8x24mm 4.72” 4.79”

2 ton 8x24mm 4.72” 4.79”

3 ton 8x24mm 4.72” 4.79”

5 ton 8x24mm 4.72” 4.79”

Hooks (Top and Bottom)

Replace the hook when the “A” or “B”

measurement, as shown in Figure 22, reaches 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.

Throat – “A”

Capacity A – Normal A – Limit

1/2 ton 1.26” 1.386”

1 ton 1.42” 1.562”

2 ton 1.73” 1.903”

3 ton 1.73” 1.903”

5 ton 1.97” 2.167”

Seat – “B”

Capacity B – Normal B – Limit

1/2 ton 1” under 0.9”

1 ton 1.15” under 1.035”

2 ton 1.56” under 1.404”

3 ton 1.56” under 1.404”

5 ton 1.78” under 1.602”

Figure 21

Figure 22

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JET 211500 Use and Care Manual Page 18

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