612601080376 Fuel Injection Pump WP12

612601080376 is a high-precision fuel injection pump designed specifically for Weichai WP12 diesel engines, commonly used in heavy-duty trucks, engineering vehicles and large generator sets. As the key part of the WP12 engine's fuel supply system, it draws diesel from the fuel tank, filters out impurities, and pressurizes it to a stable 2000-2400bar. It then sends fuel to each cylinder's injector at the right time and in the exact amount, based on how the engine is loaded and its running speed. The plunger and delivery valve are optimized to make fuel injection even-this boosts the WP12 engine's power by 12%-16% and cuts fuel use by 6%-9%. It works well in long-distance transportation, mining and plateau areas, keeping fuel supply steady without leaks or pressure drops, and meets national emission standards for WP12 matching.

①Applicable Vehicles: Fits Shaanxi Delong X3000/F3000, SINOTRUK HOWO T7H, Beiben V3, Foton Auman GTL. Also works for engineering vehicles and generator sets equipped with Weichai WP12 engines, including WP12.336, WP12.375 and WP12.430 models.

②Adaptable System: Works seamlessly with the WP12 engine's original fuel supply system-including fuel filters, injectors, fuel return pipes and ECU. No extra modifications or debugging of the fuel circuit are needed.

③OE Reference Number: 612601080376

④Interchangeability: Follows the original installation dimensions of the WP12 engine. You can replace the original pump directly, no need to adjust brackets, pipelines or wiring harnesses-saves a lot of maintenance time.

⑤Value-added Service: We can verify if it fits your equipment using the vehicle's VIN code, WP12 engine model and displacement. We also provide guidance on cleaning the fuel circuit before installation and debugging the pressure after installation.

• Rated Working Pressure: 2000-2400bar (matches WP12 high-power demand)
• Fuel Injection Timing: 13-16° BTDC (adjustable by WP12 model)
• Fuel Supply Quantity: 220-270ml/1000r (stable at rated speed)
• Working Speed Range: 750-2600r/min (adapts to WP12 speed)
• Working Temperature: -40℃~115℃ (resists WP12 engine compartment high temp)
• Fuel Type: 0# diesel (-10#/-20# optional in winter)
• Installation Method: Bolted to WP12 front cover, connected to crankshaft via timing gear

• Overall Dimensions: 360mm×290mm×230mm (L×W×H)

• Overall Weight: 19.2kg (excl. accessories)

• Plunger Diameter: 13mm (optimized for WP12)

• Number of Cylinders: 6-cylinder (matches WP12)

• Control Mode: Mechanical (matches WP12 original system)

Core Materials

Pump body uses high-strength gray cast iron (HT250) for rigidity, wear resistance and vibration reduction. Plunger and barrel assembly adopts GCr15 bearing steel (HRC62-66 after quenching) for wear resistance and sealing. Delivery valve is 40Cr alloy steel with precise dimensions. Timing gear is 20CrMnTi alloy steel (carburized and quenched) for tooth hardness. Sealing rings are high-temp oil-resistant nitrile rubber, preventing leakage.

Surface Treatment

Pump body is phosphated for corrosion resistance. Plunger surface is polished and chrome-plated to reduce friction. Delivery valve seat is precision ground. Mount surfaces are precision machined and coated with anti-seize agent. Timing gear surface is nitrided to improve wear resistance and service life.

Production Craftsmanship

Pump body is precision cast for accuracy and dense structure. Plunger and barrel are paired and ground with 0.001-0.003mm clearance. Delivery valve and seat use precision grinding. Assembly with positioning tools reduces vibration and noise. Each pump passes leak detection, fuel supply test, timing test and idle stability test before delivery.

①Quality Grade: OE-matching, compliant with WP12 standards. Passed 800-hour extreme condition bench test, performing same as original parts for harsh environments.

②Inspection Items: High-pressure leak detection (2800bar), fuel supply accuracy, injection timing, idle stability, high-speed performance, appearance and dimensional sampling.

③Quality System: IATF16949 and ISO9001 dual certified, with full-process quality control.

④Batch Tracking: Laser-marked OE number, batch number and production date. 3+ years of records for traceability and quick problem solving.

①Average Service Life: ≥2.5 years (260,000km), matching WP12 maintenance cycle, reducing costs.

②Performance Advantages: Precision plunger and delivery valve for uniform injection, improving WP12 efficiency and reducing noise. High-pressure sealing prevents leakage. Optimized timing ensures power and fuel economy. Mechanical control is simple and easy to maintain.

③Harsh Environment Adaptability: Withstands -40℃ low temp and 115℃ high temp. Adapts to dust and humidity, prevents corrosion. Compensates for plateau low-pressure, ensuring stable WP12 power.

Packaging Configuration

Three-layer packaging: inner foam + middle EVA + outer corrugated carton. Pump is fixed with brackets to avoid transportation damage. Oil ports are sealed with plastic plugs. Accessories are independently packaged in the same carton.

Marking Specifications

Outer Carton: OE number, product name, applicable vehicles, quantity, batch number, weight, warning signs, multilingual export instructions.

Product Marking: Laser-marked OE number, rated pressure, production date and batch number-clear and wear-resistant.

Customization Service: Neutral/LOGO packaging available. Carton printing and size adjustable for different markets.

①Inventory Status: Sufficient stock for WP12 models, supporting immediate spot delivery.

②MOQ: 5 units; tiered discounts for bulk orders; customizable production cycles.

③Delivery Cycle: Spot orders shipped in 24-48hrs; bulk orders in 5-8 days. Foreign trade supports customs clearance and provides export documents.

④Supply Stability: Monthly output ≥5,500 units with independent lines and supply chains, ensuring stable delivery.

①Certification: IATF16949 and ISO9001 dual certified; third-party test reports available on request.

②Quality Guarantee: 15-month warranty. Free return/exchange and replacement for non-human faults.

③Technical Support: 24-hour online service; engineers provide WP12-specific guidance and fault diagnosis.

④Return Policy: Supplier bears freight for non-human faults. Free replacement for transportation-damaged products.

Q1: Compatible with all WP12 models?

A1: Fully compatible with WP12.336, WP12.375, WP12.430. Provide model for precise verification.

Q2: WP12 installation precautions?

A2: Clean fuel circuit/filter; use qualified diesel; adjust timing by WP12 model; idle 2-3 mins before shutdown.

Q3: Foreign trade customization?

A3: Yes, neutral/LOGO packaging and multilingual documents available, with customs clearance docs.

Q4: Unstable pressure during warranty?

A4: Provide fault photos/batch number; new pump sent with freight covered if quality issue.

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