Everyone knows that repairs or replacements must be made when something fails, wears out and no longer works. These repairs and replacements are most times costly, not only the replacement price, but downtime and potential break in time.
Often the new replacement parts have the same fitting tolerances as if they were new, which increases the stresses and strains forced on them as they try to break themselves in with other parts already worn and broken in.
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These conditions increase the need to pay more attention and increase inspections both on the new replacements, but maybe more important their effect on other parts or equipment.
An example could be installing a new cable on a roll-off hoist and not noticing the cable sheave had a worn bushing and cable groves in the sheave made by the older cable. The result could require more greasing of the sheave until the new cable wears itself into the sheave (break in period).
When checking or inspecting a roll-off hoist, listen as well as look because any rubbing, scraping, squeaking or friction noise is a sign of excess wearing and therefore a forecast of a failure to happen.
Remember to always use a good grade of grease.
More information can be found in GalFab’s Roll-off Hoist operating manual entitled “Lubricating Information for Roll-off Hoists” 12.28.10.