Most modern trailer suspensions are basically maintenance free, but that doesn't mean they are impervious to damage or normal wear and tear. Regular inspections will keep your rolling stock rolling.
How to Rebuild Tank Trailers
What's a fleet to do with a worn-out tank trailer with a perfectly good barrel? Rebuild the thing, of course. Refurbishing gives owners the benefit of the latest lighting, brake, and suspension innovations on a virtually new chassis for about half the cost of a whole new tank trailer – and you don't have to pay the federal excise tax.