Fits Models At A Glance:
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Cummins B-Series 390 Engines (Lucas / CAV Pump ONLY):
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4B-390
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4BT-390
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4BTA-390
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Case Backhoe Loaders:
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480E, 480F
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580E, 580 Super E
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580K, 580 Super K
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580L
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Case Loader / Landscaper Models:
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480E LL, 480F LL
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570LXT
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Case Forklifts:
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584E, 585E, 586E
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Case Skid-Steer Loaders:
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1840, 1845C, 85XT
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Case Trenchers:
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660, 760
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Case Dozers:
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450C, 455C
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550, 550E, 550G
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Case Wheel Loaders:
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W11B
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Key Notes:
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Application:
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High-pressure fuel line from injection pump to cylinder 2 injector
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Injector Position:
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Cylinder 2 (second cylinder from the fan)
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Engine Type:
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Cummins B-Series 4-cylinder diesel engines
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Pump Type:
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Lucas / CAV rotary injection pump ONLY
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Pump Mounting:
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3-bolt flange configuration
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Material:
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Precision-formed steel fuel line
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Function:
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Delivers metered high-pressure fuel to maintain correct injection timing
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Part Numbers:
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J903523
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3903523
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Interchange:
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Direct replacement for original Case injector line
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Notes:
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Will NOT fit Bosch inline pumps
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Will NOT fit Bosch rotary pump systems
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Why Choose Broken Tractor:
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Correct Pump-Specific Fitment:
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Designed specifically for Cummins engines using Lucas / CAV rotary pumps
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Precision Fuel Delivery:
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Maintains proper injector pressure and combustion timing
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Fast U.S.-Based Shipping:
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Minimize downtime on working equipment with quick fulfillment
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