Cat Fuel Injector 1007559 for Caterpillar Engine
Product Description
The CAT Fuel Injector 100-7559 is a nozzle / fuel injection valve designed for older Caterpillar engines such as the 3306 / 3306B. This is a “classic” style injector nozzle rather than a full common-rail or HEUI module — suited for machines like articulated dump trucks (D250E / D250E II) or generator sets (e.g., SR4). With its metal construction and proven design, it ensures reliable spray pattern and atomization to maintain power, even in high-hour engines.
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Part No: 100-7559, with cross references 0R-4340, CA1007559.
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Compatible with Caterpillar 3306 / 3306B engines.
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Nozzle-type injector — simpler design, reliable for legacy equipment.
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Helps restore atomization, reduce unburnt fuel, and stabilize combustion.
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Compact and durable: built to last in high-use, high-duty-cycle machines.
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Because it's a “nozzle” rather than a full injector body, maintenance tends to be less complex (but still must be done carefully).
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When to Replace:
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Ideal to replace when older machines are showing rough idling, poor fuel efficiency, or smoking.
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Good choice for rebuilds or overhauls of legacy 3306 engines.
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Check other fuel system parts (filters, lines) while replacing nozzle to ensure no contamination persists.
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