Type: Lessons Learned
Publisher: URS CH2M Oak Ridge, Oak Ridge, TN
Published As: Public
Lessons Learned: The weight of the drum web ratchet is heavy enough to cause a non-uniform alignment if allowed to free hang during tightening of the web around the drum, which can lead to accelerated wear on the web section in the ratchet assembly. Accelerated wear can be reduced by supporting the weight of the ratchet while tightening in a manner that ensures web is centered on the ratchet pin to eliminate the top twist that can get caught between the pin and ratchet housing where it could experience a chewing effect that damages the web enough to warrant removal from service.
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