Service Data

Check for bending of the whole jib.

significant bending in vertical horizontal direction shall be found.

Check for dents and other localized indentation or bending. IWY01-0010E08

0.8 (for indentations with L 15 mm) 5.4 Wire rope

Criteria for wire rope

1. Replace the wire rope if it is deformed or corroded.

2. Replace the wire rope if it is kinked.

3. Replace the wire rope if 10% or more of the wires (except for filler wires) in a lay are broken.

4. Replace the wire rope if the diameter is reduced by more than 7% of the nominal diameter.

5. Replace the wire rope if it has been degraded by heat.

Determination of limit minor diameter (When rope of nominal diameter less than 25 mm is used)

Limit minor dia.

= Standard minor dia. - (Nominal rope dia. × 0.3)

Nominal diameter of winch rope: ∅16 mm

5.6 Inspection the hook block [NOTICE]

The hook block is an important safety part. Follow the procedure below to inspect it and be sure to use it only under safe conditions. If any problems are found during inspections, repair or replace the part immediately. A change inspection must be performed when parts are replaced.

1. The sheave groove must be smooth to avoid damaging the wire rope. Use a grinder to smooth and correct any sharp corners.

2. Check whether or not the sheaves turn lightly. If a sheave turns heavy, the wire rope will slide against it, and the rope may be damaged. If a sheave turns heavy, inspect the sheave bearings, and lubricate or replace them if necessary.

3. Check that the sheave split pins and installation bolts are securely installed.

4. Check that the hook nuts are securely installed. If necessary, tighten them further or take steps to prevent their rotation.

5. Replace any worn or damaged hook nuts immediately.

6. Check that the wire rope latch functions correctly. If necessary, replace the spring.

7. Perform a magnetic flaw detection test at least once a year to check for cracks or other flaws in the hook. Replace the hook immediately if any cracks are found.

8. As shown in the figure, punch marks are stamped on each hook. Replace the hook when the deformation of the dimension (a) between these marks has increased by 5%.

9. The wear limit of the hook (b) is 3% of the whole thickness (c).