4
Checks on load hook (see Fig. 4 and Table 1)
Opening dimension C on the hooks is important. A hook with too
large a maximum dimension has been exposed to overloading
or overheating. It therefore does not have the necessary load
capacity. The hooks may also have been exposed to long-term
wear (dimension K).
Hooks must be discarded and replaced if:
• The maximum C value is exceeded (according to Table 1)
• The minimum K value falls short (according to Table 1)
• The hook shows signs of cracking
• The hook is deformed or otherwise damaged
Defective hooks must be replaced before using the chain block
again.
Table 1 Load hook
WLL t 0,25 0,5 1 2 3 5 10
Model PCB-S2 PCB-S2 PCB-S2 PCB-S2 PCB-S2 PCB-S2 PCB-S2
Dimension C nominal mm 24 25,5 30 38,5 41,5 47 55
Dimension C max mm 26,4 28,0 33 42,3 45,5 51,7 60,5
Dimension K nominal mm 15 19 25 33,5 39 44,5 62
Dimension K min mm 13,5 17,1 22,5 30,2 35,1 40,0 55,8
Checks on load chain (see Fig. 5 and Table 2)
Inspect the load chain over its whole length to detect any deformed or otherwise damaged links. Make a check measurement of suspect links.
Measure the worn areas Also, every 300 mm (normally), make check measurements of the internal length of 5 links (pitch dimension 5xP – ac-
cording to Table 2).
Fig 5 Checking load chain dimensions
Table 2 Load chain
Max. load t 0,25 0,5 1 2 3 5 10
Model PCB-S2 PCB-S2 PCB-S2 PCB-S2 PCB-S2 PCB-S2 PCB-S2
Link diameter nominal mm 4,0 5,0 6,3 8,0 7,1 9,0 9,0
Link diameter min. mm 3,6 4,5 5,7 7,2 6,4 8,1 8,1
Pitch dimension (5xP) nominal mm 60,0 75,0 95,0 120,0 105,0 135,0 135,0
Pitch dimension (5xP) max. mm 61,8 77,2 98,0 123,5 108,1 139,0 139,0
The load chain must be discarded and replaced if:
• cracks are detected on any link
• any link is deformed or otherwise damaged
• The minimum value of any link’s diameter falls short
• the maximum value of the pitch dimension is exceeded at any point
• the chain is damaged by overheating or has been affected by weld splatter
Load chains must not be repaired – they must be replaced by new chain. If it is desired to lengthen the chain, it must be replaced by a new and
longer chain.
Replacement of the chain shall be performed professionally by an authorized repairer and the chain must meet the requirements stated in the
standard EN 818-7, Grade T from the following manufacturers: Chaineries Limousines, Pewag, Thiele or Rud.
Fig. 3 The chain must not be twisted Fig. 4 Load hook
C
