Rock Products

APR 2018

Rock Products is the aggregates industry's leading source for market analysis and technology solutions, delivering critical content focusing on aggregates-processing equipment; operational efficiencies; management best practices; comprehensive market

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20 • ROCK products • April 2018 •  Filter plates can be repaired if damage is in a small shallow area. •  Filter plates can be replaced through the bottom, top or side depending on the type and configuration of the filter press. Filter Plate Hangers, Wheels Maintenance •  Should be checked weekly for operating alignment and wear. •  Bolts should be checked periodically and tightened as needed. Filter Plate Opening Mechanism/Chain Maintenance •  Chain drive and tail shaft bearings should be lubricated per the recommended schedule. • Chain should be checked weekly for proper tension. Hydraulic Power Unit Maintenance •  Change filters at least every 500 hours of operation or after every oil change. •  Perform oil testing every six months and change as recom- mended by hydraulic oil supplier. • Check calibration of pressure indicators and relief valves yearly. Lubrication •  Lubricate bearings and change oil per the OEM recom- mended lube schedule. Feed Pump Maintenance •  Check gland water condition, level, flow and pressure every shift. • Check lubrication of bearings weekly. • Perform condition monitoring of pump weekly. Along with regular maintenance tasks, winterization of the filter press is something to think about. Producers operating in cold climates need to be aware of the damage that ice can cause. Although many of the Filter Presses are under roof, freezing can still occur, causing damage to equipment. To avoid damage to your filter press during the cold winter months here are some key points: •  Slurry feed pumps should be opened, cleaned and drained. • Gland system for feed pumps should be opened, cleaned and drained. • All piping should be opened, cleaned and drained. • All valves should be opened, cleaned and drained. • Filter cloths and plates should be washed leaving no mud between cloth and filter plates. • Filter cloths and plates should be dry as possible prior to closing mobile plate. •  Mobile plates should be closed against filter plate stack but not fully pressurized. •  Threads and machined surfaces, such as cylinder rods, should be protected against rust and corrosion. •  Cloth washing systems need to be drained, cleaned and blown dry. • Bay doors should be cleaned and placed in the closed and locked position. • Filter plate chain opening mechanism should be oiled and covered if it could become exposed to the elements. •  Hydraulic power units should be topped off with oil; oil should be replaced during spring start-up. Information for this article courtesy of McLanahan Corp. Filter Press

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