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TR521 Trommel Screen

Designed to separate a wide variety of materials such as compost, soil, sands, gravel, light aggregate and sludge.



The TR521 Tier 4F Stage IV trommel screen is specifically designed to separate by size a wide variety of materials such as compost, soil, sands, gravel, light aggregate and sludge. Screen enhancements to the drum enable quicker and simpler changeout and tensioned screens allow for increased overall open screen area. The revamped TR521 with wireless remote control offers intelligence to the machine for operational setting control and allows the operator to monitor from a loader cab or distant location.

Features and benefits

Axle/SuspensionLeaf spring
Tires - Option One235-75R 17.5 H qty 8
Frame DescriptionFour independent hydraulic jacklegs
Conveyor Belt Type220 lb (99.8 kg), 2-ply, 3/16" x 1/16" (4.8 mm x 1.6 mm)   
Head/Tail Pulley TypeRubber-lagged, 12" (30.5 cm) diameter, 38" (996.5 cm) wide   
Head Pulley Bearing2.5" (6.4 cm) pillow block   
Rubber FlashingAdjustable, .25" (6.4 mm) thick, 4" (10.2 cm)   
Idler Type20 degrees CEMA "B" with permanently sealed bearings spaced at 24" (61 cm) centers   
Self-Cleaning Return Idlers7, each 4" (10.2 cm) diameter   
Fines Conveyor FramePart of trailer frame
Make and ModelCummins QSB 3.8l Tier 4 Final
Engine Rating120 hp
Fuel Consumption3.1 gph (11.7 L/hr)
Battery950 CCA
Oil FilterSpin-on
Recommended OilMobil 15W40
System Voltage12 V, 134 amp alternator
Air CleanerDual element
Radiator FanSuction
Troughing Idler Type20 degrees CEMA "B" with permanently sealed bearings spaced at 24" (60.96 cm) centers
Conveyor Belt Type220 lb (99.8 kg), 2 ply, 2/16" x 1/16" (4.8 mm x 1.6 mm)
Conveyor Belt Stacking Height14.5' with drum at 4 degree
Fines Conveyor Frame4" x 8" (10.2 cm x 20.3 cm) structural steel tubing
Rubber FlashingAdjustable, .25" (.64 cm) thick, 4" (10.16 cm)
Head Pulley TypeRubber lagged, 12" (30.5 cm) diameter, 38" (996.5 cm) wide
Self-Cleaning Tail Pulley Dimensions10" (25.4 cm) diameter, 38" (96.5 cm) wide with 2.4" (6.1 cm) shaft
Self-Cleaning Return Idlers7, each 4" (10.2 cm) diameter
Head Pulley Bearing2.5" (6.4 cm) pillow block
Conveyor Belt Type150 lb (99.8 kg), 2-ply, 1/32" x 1/32" (.8 mm x .8 mm), vulcanized
Head/Tail Pulley TypeRubber-lagged, crowned, 9.75" (24.8 cm) diameter, 32" (81.3 cm) wide   
Head Pulley Bearing2.5" (6.4 cm) pillow block   
Rubber FlashingAdjustable, .25" (6.4 mm) thick, 4" (10.2 cm)   
Idler Type30 degrees CEMA "B" with permanently sealed bearings spaced at 41" (104.1 cm) centers   
Self-Cleaning Return Idlers4, each 4" (10.2 cm) diameter   
Fines Conveyor Frame2" x 8" (5.1 cm x 20.3 cm) structural steel building   
CapacityApproximately 150 cu yd (114.7 m³) per hr with .5" (1.3 cm) screens installed and material with moisture less than 40%
Hopper Height9.5' (2.9 m) from ground level at operating incline
Hopper Opening13.2' x 5' (4 m x 1.5 m)
Apron Conveyor Rollers6" (10.2 cm) diameter qty. 13
Apron Conveyor Speed0-35 fpm (0-10.7 m/min)      
Operation62.9 gpm @2500 psi (238.1 L/min @ 172.4 bar)
Head Pulley Bearing2.5" (6.4 cm) pillow block
Overs Conveyor Frame2.3" x 8" (5.7 cm x 20.3 cm) structural steel channel tubing
Conveyor Belt Type220 lb (99.8 kg), 2 ply, 2/16" x 1/16" (4.8 mm x 1.6 mm)
Conveyor Belt Size36" (91.4 cm) wide with raised crescent
Solid Return Idler Size4" (10.2 cm) diameter
Self-Cleaning Tail Pulley Dimensions10" (25.4 cm) diameter, 38" (96.5 cm) wide with 2.4" (6.1 cm) shaft
Conveyor Belt Stacking Height3' (.9 m) x 10' (3.1 m)
Head Pulley TypeRubber lagged, 12" (30.5 cm) diameter, 38" (996.5 cm) wide
Brush Assembly SupportTwo 1.25" (3.2 cm) sealed ball bearings
Bristle MaterialPolyethylene
Drum Operation0-33.1 gpm (0-125.3 L/min)      
Drum Speed0-24 rpm
Drum Motor48.8 cu in (800 cu cm) displacement      
Drum Angle Adjustability3-5 degrees
Drum Drive Chain120 WT
Drum Support DescriptionFour steel trunnion rollers 8 in (20.3 cm) diameter 4 in (10.2 cm) width
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