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Ca-terpillar 3312B Fuel Injector

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Guangzhou Zhuohang Auto Parts Co., Ltd.

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Ca-terpillar 3312B Fuel Injector

Supply Ability : 1000

Model Number : 126-0499

Main Body Material : Quenched high-strength alloy steel

Price : 100💲 Up to 200💲

Nozzle Design : Multi-orifice precision spray nozzle

Payment Terms : L/C,D/A,D/P,T/T,Western Union

Single Net Weight : ~0.54kg / 1.19 lbs

Place of Origin : guangdong

Sealing Accessories : Heat-resistant fluorine rubber O-rings, metal gaskets

MOQ : One

Calibrated Opening Pressure : 42–115 MPa OEM standard pressure

Brand Name : Cat

Injector Type : Mechanical Unit Injector (MUI, Camshaft Driven)

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Ca-terpillar 3312B Fuel Injector

The Ca-terpillar 3312B mechanical unit injector is the core fuel delivery component of the classic Cat 3312B heavy-duty engine fuel system. Adopting integrated MUI (Mechanical Unit Injector) structure, it combines high-pressure plunger assembly, needle valve, multi-orifice nozzle and sealing kits into one compact unit, driven directly by the engine camshaft rocker arm to generate high injection pressure without external high-pressure fuel pipes.

This injector strictly follows Cat original factory calibration standards to accurately control injection timing, fuel delivery volume and spray pattern. It sprays fine diesel mist evenly into combustion chambers to realize full fuel-air mixing, significantly boosting combustion efficiency, reducing black smoke, lowering carbon buildup inside cylinders, and restoring the engine’s original rated horsepower and torque.

Common failures of worn injectors include hard cold start, uneven cylinder operation, severe engine knocking, rising fuel cost and accelerated cylinder liner wear. Our upgraded 3312B injectors with wear-resistant hard coating and brand-new high-temperature sealing components perfectly solve all these failure issues.

4W7071 Ca-terpillar Direct Injection Fuel Injector

This pencil-type mechanical injector 4W7071 is OEM replacement for Cat-erpillar 3406, 3406B, 3406C, 3412, 3412B diesel engines.

Cross Reference Interchange Numbers

Interchangeable with 4W7017, 4W7018, 4W7019, 8N7005, reman part codes 0R-1744, 0R-3421, direct plug-and-play replacement without modification.

Applicable Equipment

Fits heavy-duty mining trucks 769C, 771C, 773B, 775B; D8 series bulldozers, 980C wheel loaders, 637E scrapers, stationary generator sets, marine propulsion units powered by 3400 series engines.

Precise fuel atomization optimizes combustion, solves hard start, rough idle, excessive black smoke and power shortage. Made of wear-resistant alloy with strict OEM tolerance, high pressure sealing for long-hour heavy-load harsh operation, stable aftermarket overhaul spare part.

We are a professional manufacturer and exporter specializing in diesel fuel injection spare parts, covering Bo-sch, Cat-erpillar, Scania and other mainstream brands. With over 10 years of industry experience, we strictly implement full bench testing for every injector to guarantee OEM-level precision and stability. We stock a complete product range including unit injectors, nozzles and injection pumps, offering one-stop sourcing for global repair shops, fleet operators and distributors. All goods adopt shockproof anti-rust packaging and come with a 12-month quality warranty. We support flexible MOQ, fast global delivery and customized technical support, winning long-term trust from clients across Europe, Southeast Asia, the Middle East and Africa.

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