XCMG QAY220, Руководство по эксплуатации, Страница: 97 / 172

QAY220 All Terrain Crane Operation Manual
5-19
5-5 Hook block
5-5-1 Basic type and structure
Hook capacity Max. parts of line
160 t
100 t
65 t
30 t
Dead weight (t)
16
10
6
3
2.4
1.5
0.8
0.4
5-5-2 Inspections
Four hook blocks are available for QAY220 AT. Select proper hook block according to working
condition and the total rated lifting load so as to give full rein to its lifting capacity.
Regular inspection (every 30 days) should be performed by operator or designated personnel,
period inspection (every year) should be performed by full-time personnel.
The hook block should be discarded if one of the following occurs ( no welding is allowed on the
hook block)
：
1. Cracks and damage on hook surface;
2. Hook opening exceeds 10% of the nominal dimension (refer to the nameplates of main and
auxiliary hook block), refer to y1 and y2 shown in Fig. 12 for measuring value of double hook, and y
shown in Fig. 13 for single hook.
3. Critical section wore reaches 10% of the original dimension;
4. Wear of rope touching surface exceeds 5% of the original height, refer to
△
s shown in Fig. 12
and Fig. 13;
5. Twisting deformation of hook exceeds 10
°
, refer to
α
shown in Fig. 12 and Fig. 13;
6. Plastic deformation on critical section of hook tail and threads and on hook shank.
7. The diameter of hook shank is less than 95% of the original dimension, refer to d1 shown in
Fig. 12 and Fig. 13;
8. Corrosion on hook threads.
Accessories
Chapter 5
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