Caterpillar Injector C9.3 New Fuel Injector 171-9704 1719704 20R-5075 3861809 386-1809 382-0709 4563493 456-3493 For C9.3 D6T D7E Original New Injector

Parameter Item

Specific-ation Details

Part Number

171-9704 (1719704); Cross-References: 222-5965, 155-1819, 173-9379, 169-7408, OR9348

Engine Compatibility

c-aterpillar C9.3 Series Diesel Engines (9.3L Displacement, 270–390HP); Compatible with 3126B, 3126E Series Engines (3126B HEUI)

Injection System

HEUI (Hydraulic Electronic Unit Injector); 5-hole VCO Precision Nozzle; 0.014 inch hole size; 158° spray pattern; 2100–2500bar Rated Pressure

Fitment Style

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

Quality Standard

c-aterpillar OEM Standard; ISO 9001 Certified; 100% Professional Factory Bench-Tested

Condition & Warranty

New Aftermarket; 12-Month Quality Warranty; MOQ: 6 Pieces (Negotiable); Origin: USA/China; Supply Capacity: 8000 Pieces/Month

Physical Data

Net Weight: 1.7kg (3.75 lbs); Gross Weight: 1.9kg; Package Size: 23×9×7cm; Neutral/Original Export Packaging (Customizable)

Key Parameters

Fuel Type: Diesel (Low-Sulfur Compatible); Operating Voltage: 24V; Body Hardness: HRC62-65; Response Time: ≤18ms; Atomization Particle Size: 15μm

Applic-ation Field

Typical Applicable Equipment

Construction Excavators

c-aterpillar 330F, 336E Series Excavators (C9.3-Powered); 3126B-Powered Excavators

Wheel Loaders

c-aterpillar 966K, 972K Series Wheel Loaders (C9.3-Powered); 3126E-Powered Loaders

Marine Vessels

c-aterpillar 3126B-Powered Marine Vessels; C9.3-Powered Marine Equipment

Industrial & Voc-ational Equipment

c-aterpillar C9.3, 3126B, 3126E-Powered Industrial Machinery and Voc-ational Vehicles

Key Performance Metric

Core Benefit

Injection Precision & Atomization

5-hole VCO nozzle (0.014 inch) with 158° spray pattern and HEUI technology ensure ultra-precise fuel metering (error ≤±2%), superior atomization (15μm particle size), and optimized combustion, reducing fuel waste by 3–5% and meeting strict emission standards.

Durability & Wear Resistance

High-strength stainless steel body with vacuum quenching heat treatment (HRC62-65) enhances wear and corrosion resistance, extending service life to match the C9.3 engine's overhaul cycle in harsh working environments.

Reliability & Stability

100% professional factory bench testing (high-pressure performance, spray pattern, sealing) ensures consistent performance; fast HEUI system response (≤18ms) enables multiple injections, reducing noise and resolving engine misfires, power loss, and excessive fuel consumption.

Cost-Effectiveness & Convenience

Direct OEM replacement enables plug-and-play installation without modific-ations, saving time and labor costs; 12-month warranty, negotiable MOQ (6 pieces), and fast delivery (3-7 days) reduce long-term maintenance and downtime costs.

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 (41–46N·m); professional installation is recommended; verify part number and engine compatibility before installation; avoid mixing genuine and aftermarket injectors in the same engine.

Maintenance Interval

Inspect injector performance every 6,500–11,000 operating hours; replace fuel filters every 200 hours to maintain fuel cleanliness (critical for nozzle protection); periodically check electrical connections and HEUI system response 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 5-hole VCO nozzle and stainless steel body; use original packaging for long-term storage if available.

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 HEUI system pressure during troubleshooting.