Drain & cleanDrain, clean and isolate.
Open & inspectOpen disc filter; inspect drum and filter cloth.
Cloth renewalReplace filter cloth; tension wire strips.
Drum thicknessUT corrosion survey of the drum; mark defects.
AgitatorsInspect blades; replace worn elements.
Grits screwInspect and repair lime-grits conveying trough.
De-scale & measureDe-scale tanks and piping; measure wall thickness.
Bearings & sealsReplace bearings and seals.
Reassemble & trialRefit and water-run.
Quality checkVerify white-liquor clarity and filtration efficiency.
Filter cloth intact and reliably tensioned; drum corrosion holes within limits; agitator and screw run smooth; tanks leak-free; white-liquor clarity and filtration efficiency to target.