326-4700 Fuel Injector Assembly for CAT 320D Excavator

product parameters

Part No：326-4700
Interchangeable Part：326-4740，326-4756
Product Type：Diesel Fuel Injector Assembly
Original Manufacturer：CAT aftermarket
Applicable Engine：Caterpillar C6.4 Diesel Engine
Applicable Equipment：CAT 320D Excavator
Matching Nozzle Model：3428
Spray Hole Quantity：6 holes high-precision atomization holes
Main Material：High-strength alloy steel + imported high-speed steel needle valve
Rated Working Pressure：1550 bar
Injector Opening Pressure：1220 bar
Adaptable Temperature：-25℃ ~ +130℃
Overall Dimension：195mm (full length)
Net Weight：Approx. 790g
Interface Specification：Standard thread
Accessories：Comes with original matching sealing ring
Testing Standard：100% full-load bench calibration test
Packaging：Independent anti-rust packaging + neutral carton
Storage Requirements：Dry indoor storage, avoid moisture, dust and corrosive environment

• **Precise fuel injection control, perfectly adapted to heavy-duty engineering working conditions**
Delivers accurate injection quantity and timing under fluctuating loads. Sustains stable power output even in continuous heavy workloads.
• **High-efficiency atomization for optimized combustion and reduced fuel consumption**
Fine and uniform fuel spray improves combustion efficiency. Cuts black smoke emission and carbon deposition, saving fuel cost.
• **Premium wear-resistant core components, anti-impurity and less prone to valve sticking**
Core parts adopt high-strength alloy material processed by ultra-precision machining. Strong resistance against abrasive particles, extending service life greatly.
• **Full bench testing for every unit, excellent performance consistency**
Each injector is fully tested for injection rate, sealing and leakage. Strict tolerance control ensures consistent performance batch by batch.
• **Direct replacement design, saving maintenance time**
Matches original mounting dimensions and interfaces. Plug and play without pipe modification, helping reduce equipment downtime and repair expense.

FAQ 

Q1: What equipment and engines is the 326-4700 injector suitable for?
A1: It fits Caterpillar C6.4 engine, widely used on CAT 320D excavator. It is fully interchangeable with 326-4740,326-4756 and other related injector models. Please confirm the engine model before installation to avoid mismatch.

Q2: What failures can this injector solve?
A2: It can effectively repair common diesel engine faults: weak acceleration, unstable idle speed, difficult cold start, black/blue exhaust smoke, high fuel consumption and engine power drop.

Q3: Is coding and calibration required after installation?
A3: Factory pre-calibrated, plug and play without complicated coding. If replacing multiple injectors at the same time or ECU stores historical fault codes, clearing fault codes is recommended for better idle stability and fuel economy.

Q4: What is the product warranty and scope of exemption?
A4: 12-month professional warranty under standard installation and normal use. Damage caused by inferior fuel, water in oil, clogged fuel filter, wrong installation torque, unauthorized disassembly & modification or mechanical failure is not covered by warranty.

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