Caterpillar Injector C9.3 Fuel Injector 456-3544 20R-5079 4563544 363-0493 Compatible For C9.3 Excavator 320D Machinery Engine Parts 6 Month Original New Injector

Parameter Item

Specific-ation Details

Part Number

20R-5079 (20R5079); Cross-References: 456-3544, 4563544, 10R-5504

Engine Compatibility

c-aterpillar C9.3 Series Diesel Engines (9.3L Displacement, 270–390HP); Compatible with C7 Series Engines

Injection System

Common Rail Direct Injection (CRDI); 5-hole VCO Precision Nozzle; 2000–2400bar Rated Pressure

Fitment Style

Direct OEM Replacement; Plug-and-Play (No Modific-ations Required)

Quality Standard

c-aterpillar OEM Standard; ISO 9001, IATF 16949 Certified; 100% Factory Bench-Tested

Condition & Warranty

New Aftermarket; 12-Month Quality Warranty (6-Month Optional); MOQ: 1 Piece; Origin: China; Supply Capacity: 4000 Pieces/Month

Physical Data

Net Weight: 1.0kg (2.2 lbs); Gross Weight: 1.2kg; Package Size: 28×13×7cm; Neutral Export Packaging (Customizable)

Key Parameters

Fuel Type: Diesel (Low-Sulfur Compatible); Operating Voltage: 24V; Core Deposit: $200.00 (if applicable); UPC: 712247at

Applic-ation Field

Typical Applicable Equipment

Construction Excavators

c-aterpillar 336E, 336EL, 336ELN Series Excavators (C9.3-Powered)

Wheel Loaders

c-aterpillar 966K, 972K Series Wheel Loaders (C9.3-Powered)

Other Heavy Equipment

c-aterpillar 568 Loaders, E336E Engined Machinery (C9.3-Powered)

Industrial Machinery

C9.3-Powered Construction, Mining, and Voc-ational Equipment

Key Performance Metric

Core Benefit

Injection Precision & Atomization

5-hole VCO nozzle and CRDI technology ensure ultra-precise fuel metering and superior atomization, optimizing combustion efficiency, reducing fuel waste and emissions, and matching c-aterpillar's original performance standards.

Durability & Reliability

High-strength alloy steel body and specialized anti-corrosion coating enhance wear and corrosion resistance; 100% factory bench testing ensures consistent performance, resolving misfires, power loss, and excessive fuel consumption caused by injector failure.

Broad Compatibility

Compatible with both C9.3 and C7 series engines, expanding applic-ation scope and providing flexibility for equipment operators and aftermarket suppliers.

Cost-Effectiveness & Convenience

Direct OEM replacement enables plug-and-play installation without modific-ations, saving time and labor; competitive pricing, flexible warranty options, and low MOQ make it a cost-effective choice for aftermarket use.

Item

Details

Installation

Disconnect the battery negative pole and release fuel line pressure before installation; thoroughly clean the fuel system and injector interface to avoid impurity entry; use dedic-ated tools to prevent component damage; replace seals and copper washers; torque to c-aterpillar OEM specific-ations (40–45N·m); professional installation is recommended; verify part number and applic-ation before installation.

Maintenance Interval

Inspect injector performance every 6,000–10,000 operating hours; replace fuel filters every 200 hours to maintain fuel cleanliness; periodically check electrical connections to ensure stable operation; use engine serial number (ESN) for precise fit verific-ation if possible.

Storage

Store in a dry, clean, and well-ventilated area (-15℃ to 45℃); package with anti-rust materials and sealed plastic bags to prevent rust, dust, and physical damage to the 5-hole VCO nozzle and alloy steel body.

Troubleshooting

Check for nozzle clogging, fuel pressure leakage, or poor electrical contact if the engine misfires, loses power, or has excessive fuel consumption; use professional diagnostic tools to read fault codes; refer to c-aterpillar official service manual for professional maintenance to avoid damaging precision components.