News

Home > News >

Company News About The 7E-8729 (7E8729) fuel injector is a premium OEM-spec replacement component exclusively engineered for c-aterpillar 3116 diesel engines, with extended full compatibility for 3114 & 3126 series engines.

The 7E-8729 (7E8729) fuel injector is a premium OEM-spec replacement component exclusively engineered for c-aterpillar 3116 diesel engines, with extended full compatibility for 3114 & 3126 series engines.

2026-04-02

The 7E-8729 (7E8729) fuel injector is a premium OEM-spec replacement component exclusively engineered for c-aterpillar 3116 diesel engines, with extended full compatibility for 3114 & 3126 series engines. Built with heavy-duty hardened internal components and precision CNC hydraulic grinding, it delivers consistent fuel atomization, zero high-pressure leakage, and long-lasting durability ideal for construction, mining, marine and industrial heavy-duty equipment. Every unit undergoes 100% full pre-delivery testing covering leakage, spray pattern, fuel pressure and flow rate, featuring a true plug-and-play design that requires no extra calibration or on-site modific-ation, perfectly matching the original c-aterpillar fuel system performance standards and operating parameters.

1. Basic Product Specific-ations

Item	Details & Key Features
Part Number	7E-8729 (7E8729); interchangeable with 4P-2995, 0R-8471, 0R-8467, 0R-8475, 0R-8477, 7E-6193, 7E-7607, 7E-8727
Applicable Engine	Primary: c-aterpillar 3116; Secondary: c-at 3114, 3126 diesel engines (full direct fit, no compatibility issues)
Product Condition	Brand New OEM Standard / Remanufactured to c-at Original Factory Spec; 100% Pre-Delivery Full Tested (leakage, spray, pressure, flow rate verific-ation)
Control Type	Mechanical Direct Injection / Solenoid-Assisted Hydraulic; professionally optimized for c-at 3116 engine fuel supply system
Fuel Compatibility	Standard diesel, low-sulfur diesel, high-sulfur diesel, marine diesel; built-in anti-coking, anti-impurity and anti-corrosion structure
Net Weight	0.7kg – 0.75kg; lightweight profile for quick installation, disassembly and routine maintenance
Installation Feature	Plug-and-Play Direct Replacement; identical mounting holes, interface size and connection specs as original c-at injector, zero modific-ation or calibration required

2. Core Performance & Technical Parameters

Parameter	Value	Performance Advantage
Injection Opening Pressure	30 ± 0.5 MPa	Precision matched to c-at 3116 engine load and daily operating characteristics, ensuring stable, thorough and efficient fuel combustion under full working conditions, no power lag or fluctuation
Needle Valve Design	Heavy-Duty Case-Hardened Needle Seat	Maximizes wear resistance, impact resistance and high-temperature fatigue durability, greatly extending service life under long-hour high-load operation, suitable for continuous heavy-duty work
Body Processing	Precision Hydraulic Grinding & Fine Finishing	Ensures ultra-precise fuel delivery and uniform cone atomization, effectively reducing fuel waste, black smoke and incomplete combustion, optimizing engine power output
Needle-to-Body Gap	Micron-Level Ultra-Precise Tolerance	Guarantees zero fuel leakage under high working pressure, stable hydraulic performance and consistent engine power output, completely eliminating idle jitter and power drop issues
Spray Pattern	Optimized Cone Atomization (OEM Standard)	Significantly improves fuel combustion efficiency, cuts overall fuel consumption by 15%-20%, lowers exhaust emissions and meets global environmental operation standards for construction machinery
Service Life	≥ 2,800,000 Injection Cycles	Strong resistance to oxidation, corrosion and mechanical fatigue, performs stably in harsh working environments like high dust, extreme temperature and heavy load

3. Material & Structural Advantages

Component	Material & Craft	Benefit for Users
Injector Body	High-strength forged alloy steel, precision CNC machining, multi-stage heat treatment	Withstands ultra-high fuel pressure and extreme temperature fluctuations, anti-deformation and anti-cracking, ensures long-term stable performance even in harsh construction and mining sites
Needle Valve Assembly	Case-hardened high-carbon alloy steel, precision grinding, anti-wear composite coating	Minimizes long-term friction wear, keeps consistent injection accuracy for a long time, reduces maintenance frequency and overall replacement costs for equipment owners

4. Applicable Equipment Models

Equipment Type	c-at Models Powered by 3116 Engine
Excavators	320B, 322B, 325B, 330B series
Wheel Loaders	928G, 938G, 950G, 950F series
Motor Graders	120H, 140H, 160H series
Other Equipment	Backhoe loaders, industrial generators, marine power units, mining machinery, asphalt pavers

5. Core Selling Points (Customer-Focused)

Key Advantage	Why Choose This 7E-8729 Injector
1:1 OEM Perfect Match	Identical size, interface and mounting specific-ations as c-aterpillar original injector, direct plug-and-play replacement, no extra calibration or modific-ation needed, greatly saves maintenance time and labor costs
Heavy-Duty Extreme Durability	Hardened needle valve and high-strength alloy body, resists daily wear, fuel corrosion, mechanical impact and fatigue, perfect for high-dust, high-load construction and mining sites with long working hours
Precise Fuel Control & Fuel Saving	Micron-level precision machining and optimized cone atomization design ensure uniform and full fuel combustion, reduce black smoke emissions, cut fuel consumption and boost effective engine power output
100% Full Tested Quality	Full inspection including high-pressure leakage test, spray pattern test, fuel pressure test and flow rate test before shipment, ultra-low failure rate, reliable after-sales support and reduced customer purchase risks
Wide Cross Compatibility	Fully compatible with c-at 3116/3114/3126 engines and multiple heavy equipment models, one injector fits various machines, effectively lowers inventory pressure and replacement costs for users

6. Common Replacement Symptoms

Power Performance Issues: Engine weak acceleration, unstable idle speed, obvious power drop, difficult cold start in low temperature

Excessive Fuel Consumption: Visible increase in diesel usage, heavy black or white smoke from exhaust pipe

Leakage & Mechanical Noise: Fuel leakage around injector body, engine abnormal noise, frequent cylinder misfire

Overall Performance Decline: Incomplete fuel combustion, severe engine carbon deposition, shortened overall service life of the engine

Events

News

Cases

Contacts

Contacts: Miss. admin

TEL:: 86-134-3456-6685

Fax:: 86-159-2067-9523

Contact Now

Mail Us

Cummins Diesel Injector

BOSCH Diesel Injector

DENSO Diesel Injector

Caterpillar Fuel Injector

VOLVO Diesel Injector

DELPHI Fuel injector

Diesel Engine Fuel Pump

TOYOTA Fuel Injector

Perkins Diesel Injector

Diesel Fuel Injector

Diesel Injector Nozzle

Injector Control Valve

Injector Repair Kit

Cummins Diesel Injector

BOSCH Diesel Injector

DENSO Diesel Injector

Caterpillar Fuel Injector

VOLVO Diesel Injector

DELPHI Fuel injector

Diesel Engine Fuel Pump

TOYOTA Fuel Injector

Perkins Diesel Injector

Diesel Fuel Injector

Diesel Injector Nozzle

Injector Control Valve

Injector Repair Kit

The 7E-8729 (7E8729) fuel injector is a premium OEM-spec replacement component exclusively engineered for c-aterpillar 3116 diesel engines, with extended full compatibility for 3114 & 3126 series engines.

News

Cases

Cummins Diesel Injector

BOSCH Diesel Injector

DENSO Diesel Injector

Caterpillar Fuel Injector

VOLVO Diesel Injector

DELPHI Fuel injector