Lifting Chain
ALIGNMENT
Figure 45 - Lifting Chain
Mode of Failure:
Alignment
Application:
1" P 5 x 6 leaf chain used in a counterbalance mechanism for the drivers cab in an overhead crane.
Failure Mode:
Excessive judder noticed by the crane driver.
Diagnosis:
Inspection of the counterbalance arrangement showed that the pulley had
worn excessively on one side. This was reflected on one side of the chain. The pulley was found to be out of line with the line of action of the chain attachment points.
Solution
Renew chain and pulley and realign.
Figure 46 - Lifting Chain
Mode of Failure:
Lubrication & Alignment
Application:
1" P 5 x 6 leaf chain used in a counterbalance mechanism for the drivers cab in an overhead crane.
Failure Mode:
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Diagnosis:
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Solution
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