Fits Models At A Glance:
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Cummins B-Series Engines (Bosch Rotary Pump Only): 4B-390, 4BT-390
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Case Backhoe Loaders: 580 Super K, 580 Super L, 590T, 590 Super L
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Case Dozers: 450C, 455C, 650, 650G
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Case Skid Steers: 90XT, 95XT
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Case Trenchers: 860
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Case Excavators: 688, 688B, 688C, 9010
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Case Wheel Loaders: W11B
Key Notes:
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Function: Delivers high-pressure fuel from injection pump to injector
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Injector Position: Cylinder 3 – third injector from the fan
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Pump Type: Bosch rotary injection pump only
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Pump Mounting: 3-bolt flange configuration
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Engine Type: Cummins B-Series 4-cylinder diesel
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Material: Precision-formed steel fuel injection line
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Part Numbers: J903482
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Interchange With: 3903482
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Location: Between injection pump outlet and 3 cylinder injector
Why Choose Broken Tractor:
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Application-Verified Fuel Line Routing for proper fit and clearance
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Correct Injector Position Matching to avoid cross-line issues
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Fast Shipping from a U.S.-based heavy equipment parts team
