500.8 Suggested Preventative Maintenance Schedule
Frequency Procedure
Check controller and pressure drop
Observe stack (visual or with opacity meter)
Walk through system, listening for proper operation
Check for unusual occurrences in process
Observe control panel indicators
Daily
Assure that dust is being removed from system
Inspect screw conveyor/airlock bearings for lubrication
Check packing glands
Operate damper valves
Check compressed air lines, including line filters and dryers
Check that valves are opening/closing properly in sequence
Spot-check cartridge appearance
Verify accuracy of temperature-indicating equipment
Weekly
Check pressure drop indicating equipment for plugged lines
Inspect fans for corrosion and material buildup
Check drive belts for wear and tension
Inspect and lubricate appropriate items
Spot check for filter cartridge leaks
Check hoses and clamps
Check accuracy of indicating equipment
Monthly
Inspect housing for corrosion
Inspect inlet baffle for wear
Inspect filter cartridges thoroughly
Check duct for dust buildup
Observe damper valves for proper seating
Check gaskets on doors
Inspect paint, insulation, etc.
Quarterly
Check screw conveyor and/or airlock for wear or abrasion
Check fan belts
Check welds
Inspect hopper for wear
Annually
Check explosion vents, see Section 340
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