Caterpillar Injector C9.3 For C-a-t 138-8756 1388756 Excavator Parts E336E C9.3 Engine Injector 460-8213 20R-5075 460-8213 456-3509 20R5075 4563509 Original New Injector

Parameter Item

Specific-ation Details

Part Number

138-8756 (1388756); Cross-References: 456-3546, 4563546

Engine Compatibility

c-aterpillar C9.3 Series Diesel Engines (9.3L Displacement, 270–390HP); Compatible with C7.1 Series Engines

Injection System

Common Rail Direct Injection (CRDI); 7-hole VCO Precision Nozzle; 2200–2600bar Rated Pressure; PT Fuel System Adaptation

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; MOQ: 1 Piece; Origin: China; Supply Capacity: 3800 Pieces/Month

Physical Data

Net Weight: 1.9kg (4.2 lbs); Gross Weight: 2.1kg; Package Size: 32×14×9cm; Neutral Export Packaging (Customizable)

Key Parameters

Fuel Type: Diesel (Low-Sulfur Compatible); Operating Voltage: 24V; Coil Resistance: 0.85–1.25Ω @ 20℃; Flow Rate: 590±5% cc/min @ 100 bar

Applic-ation Field

Typical Applicable Equipment

Construction Excavators

c-aterpillar 336F, 336FL, 340F Series Excavators (C9.3-Powered)

Wheel Loaders

c-aterpillar 966L, 972L, 980L Series Wheel Loaders (C9.3-Powered)

Motor Graders

c-aterpillar 140M, 160M, 120M Series Motor Graders (C9.3-Powered)

Industrial Generators

c-aterpillar C9.3-Powered Industrial Generator Sets (50–150kW)

Key Performance Metric

Core Benefit

Injection Precision & Atomization

7-hole VCO nozzle and CRDI technology, combined with PT fuel system adaptation, ensure ultra-precise fuel metering, superior atomization, and no pressure wave issues at high speeds, optimizing combustion efficiency, reducing fuel waste by 3–5%, and meeting strict emission standards.

Durability & Wear Resistance

High-strength forged alloy steel body with double-layer anti-corrosion and anti-wear coating enhances wear and corrosion resistance; fast plunger descending speed and small nozzle hole size further improve durability, matching the C9.3 engine's overhaul cycle.

Reliability & Stability

100% factory bench testing (high-pressure performance, spray pattern, sealing) ensures consistent performance; effectively resolves engine misfires, power loss, and excessive fuel consumption caused by injector failure, ensuring stable operation in heavy-duty scenarios.

Cost-Effectiveness & Convenience

Direct OEM replacement enables plug-and-play installation without modific-ations, saving time and labor costs; competitive pricing and 12-month warranty reduce long-term maintenance costs for equipment operators and aftermarket suppliers.

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 (43–48N·m); professional installation is recommended; verify part number and engine compatibility before installation.

Maintenance Interval

Inspect injector performance every 7,000–12,000 operating hours; replace fuel filters every 200 hours to maintain fuel cleanliness (critical for nozzle protection); periodically check electrical connections and coil resistance (0.85–1.25Ω @ 20℃) to ensure stable operation.

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 7-hole VCO nozzle and forged 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; pay attention to PT fuel system pressure detection during troubleshooting.