12
• When assembling 564a and 564b, the same sequence must be followed during reassembly or the brake will not function
properly.
• Where 2 linings are in use, the notch of one lining must be in the opposite direction to that of the other.
3.2.2. LOAD CHAIN
PITCH EXPANSION
The load chain must be carefully checked over its full length. Insert a chain gauge at about every 50 cm and check to see if the
pitch has expanded. If the pitch expansion is within the allowable limits the chain gauge will not go through, because its inserted
part will strike the load chain as illustrated in Fig.18.
If the pitch expansion has exceeded the allowable limit, the gauge will go through as illustrated in Fig.19.
Replace the chain if pitch expansion has occurred.
CHAIN DIAMETER THlCKNESS
A load chain containing a link with its diameter decreased due to corrosion or any other reason must be replaced.
Inspect chain link thickness, where critical pitch expansion appears, using the gauge. If the mouth of the gauge applied fits the link
as illustrated in Fig.20, that means diameter is less than the allowable limit.
• OTHER VISUAL DEFECTS
If any FLAWS or BENDS are found, or if any person has welded the load chain, the load chain must be replaced.
The load chain must also be replaced if any thermal effects are apparent.
NOTE: if the load chain is in good condition except for only one part or one link, the chain must be replaced with a new one.
REPLACING THE LOAD CHAIN
NOTE: The welded part of each vertical link must always face the outside in relation to the load sheave.
In the case of 2 or more chain falls to the lower hook, the end link which is fixed by a chain stopper pin must be a vertical link, so
that the chain can be installed without twisting.
Figure 18
Figure 19
Figure 20
