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The 553-8165 fuel injector pump is a high-quality diesel fuel system component developed for CAT C4.4 engine applications. Manufactured with advanced precision machining technology, durable internal components, high-pressure fuel elements, and reliable sealing systems, it ensures accurate fuel delivery, consistent injection timing, and efficient combustion performance.
Compatible with Caterpillar C4.4 diesel engines, this common fuel injector pump replaces Part No. 553-8165 and 5538165. The optimized fuel injection system helps maintain stable fuel pressure, improve atomization efficiency, enhance engine response, and restore power output while supporting lower fuel consumption during continuous operation.
This diesel fuel pump is widely used in CAT excavators, construction equipment, generator sets, industrial machinery, and other heavy-duty diesel applications powered by C4.4 engines. It is an effective replacement solution for fuel system components affected by wear, insufficient injection pressure, unstable fuel delivery, or reduced engine performance.
Designed for engine repair, overhaul, and preventive maintenance, the C4.4 common fuel injector pump provides excellent compatibility and dependable service life. Its robust construction allows reliable operation under high temperature, vibration, dust, and long working hours commonly found in construction and industrial environments.
Each fuel pump is carefully inspected before shipment through fuel delivery calibration, high-pressure testing, leakage inspection, dimensional verification, and performance evaluation to ensure consistent quality and long-term reliability.
Whether you are an equipment owner, repair workshop, machinery dealer, or spare parts distributor, the 553-8165 CAT C4.4 fuel pump provides a dependable solution for restoring engine efficiency, reducing downtime, and maintaining stable equipment operation.
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item
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value
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Condition
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New
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Applicable Industries
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Building Material Shops, Machinery Repair Shops, Manufacturing Plant, Retail, Construction works , Energy & Mining, Other
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Showroom Location
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Video outgoing-inspection
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Provided
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Machinery Test Report
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Provided
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Marketing Type
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Ordinary Product
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Place of Origin
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China
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Guangdong
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Brand Name
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lanxin
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Warranty
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6 months
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Product name
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Excavator Parts Common Fuel Injector Pump 553-8165 5538165 for Caterpillar C4.4 Engine Diesel Fuel Pump
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Q1: Which engine is this fuel injector pump compatible with?
A: It is designed for Caterpillar C4.4 diesel engines. Please confirm your engine model and fuel pump number before ordering.
Q2: Which part number does this fuel pump replace?
A: It replaces 553-8165 and 5538165.
Q3: What equipment can use this diesel fuel pump?
A: It is suitable for CAT excavators, construction machinery, generator sets, industrial engines, and other equipment using C4.4 diesel engines.
Q4: What advantages does this common fuel injector pump provide?
A: It provides accurate fuel delivery, stable injection pressure, improved combustion efficiency, reliable engine output, and long service life.
Q5: What other Caterpillar engine parts do you supply?
A: We supply fuel injection pumps, injectors, turbochargers, complete diesel engine assemblies, cylinder heads, cylinder blocks, crankshafts, camshafts, overhaul kits, starter motors, alternators, ECUs, hydraulic pumps, and a complete range of excavator engine spare parts.
