Rotary lobe blowers are built to run hard, but they aren't maintenance-free. Like any positive displacement machine, they rely on tight internal clearances, proper lubrication, and clean inlet air to perform at peak efficiency. When something starts to go wrong, the blower almost always gives you warning signs before a catastrophic failure. Catching these signs early can save you thousands in emergency repairs and lost production.
The five most common warning signs are: unusual noise (knocking, grinding, or whining), excessive vibration that wasn't present before, a noticeable increase in discharge temperature, rising amperage or energy bills with no change in demand, and oil leaks around shaft seals or the gear case. Any one of these symptoms warrants an inspection — and if you're seeing two or more, schedule service immediately before a minor issue becomes a major rebuild.
Preventative maintenance is the most cost-effective approach to blower reliability. A routine service visit includes checking belt tension, inspecting inlet filters, verifying oil levels and condition, measuring vibration baseline, and confirming discharge pressure against design specs. Most Roots-style blowers should be inspected every 4,000–6,000 operating hours, though harsh environments (dusty, high-temperature) may require more frequent attention.
American Compressor Company operates a full-service Roots blower center out of our Santa Fe Springs facility. We stock OEM parts, perform factory-level rebuilds, and offer field service across Los Angeles County. If your blower is showing any of these warning signs, call us at (800) 955-6188 — we'll get a technician to your site quickly and keep your operation running.
