104641-4101 High-Pressure Fuel Pump – Precision Flow Control for Commercial Diesel Engine Platforms
1. Product:104641-4101
2. Compatible Equipment: Diesel Fuel Injection Systems
3. Manufacturer: Aftermarket OEM Replacement
4. Condition: Brand New, Fully Tested
5. Origin: ABOSEDE Diesel
6. Shipping period: 3-5 business days
7. Payment terms: T/T, Western Union, PayPal
- Fast Delievery
- Quality Assurance
- 24/7 Customer Service
Product Introduction
In high-load commercial diesel engines – whether powering delivery trucks, construction equipment, or marine auxiliary units – the fuel pump's ability to maintain a consistent fuel volume across varying engine speeds is critical for stable combustion, predictable power output, and emissions compliance. The 104641-4101 is a radial-piston high-pressure pump engineered for the commercial vehicle market, delivering a maximum rail pressure of 1,600 bar (23,200 psi) and a displacement of 0.96 cc per revolution. This pump features a 3-plunger radial configuration with a 9.0 mm plunger diameter, providing a delivery rate of 400 L/h at 3,000 rpm – a specification that ensures the engine receives the fuel volumes required for sustained high-load operation in demanding duty cycles. The defining metric of this pump is its flow stability under transient conditions – a rail pressure deviation of less than ±3% from nominal during rapid load changes, achieved through a precisely machined cam plate and individually matched plunger clearances of 3–5 microns.
█ Application Coverage – Commercial Diesel Platforms
The 104641-4101 is a service replacement pump for the following commercial diesel applications:
Hino – J05E (5.0L), J08E (7.7L) engines in medium-duty trucks
Isuzu – 4JJ1 (3.0L), 4HK1 (5.2L), 6HK1 (7.8L) commercial engines
Mitsubishi Fuso – 4M50 (4.9L), 6M60 (7.5L) diesel engines
Nissan Diesel (UD Trucks) – 4/6-cylinder commercial diesel platforms
Komatsu – Industrial engines used in construction and mining equipment
The pump is a direct replacement for part numbers 104641-4100, 104641-4102, and is compatible with both Euro 3 and Euro 4 emissions-compliant engines. It is supplied as a complete pump assembly, including the housing, plungers, delivery valves, and suction control valve (SCV).
▐ Technical Specifications – Mechanical and Hydraulic Data
| Parameter | Specification |
|---|---|
| Pump Type | Radial-piston (3-plunger) |
| Plunger Configuration | 3-plunger |
| Plunger Diameter | 9.0 mm |
| Plunger Stroke | 6.3 mm |
| Displacement per Revolution | 0.96 cc |
| Maximum Rail Pressure | 1,600 bar (23,200 psi) |
| Delivery Rate @ 3,000 rpm | 400 L/h |
| Drive Speed Ratio | 1.2:1 (pump:engine) |
| Suction Control Valve | Normally-open, PWM-controlled |
| Pressure Ripple | ≤ 3% deviation |
| Housing Material | Aluminium alloy (die-cast) |
| Plunger Material | Case-carburised steel (62–64 HRC) |
| Cam Plate Material | Hardened alloy steel (60–62 HRC) |
| Drive Connection | Splined shaft (14-tooth) |
| Inlet Fitting | M14 × 1.5 |
| Outlet Fitting | M16 × 1.5 |
| Service Interval (with 5 µm filtration) | 150,000–200,000 km |
◆ Construction Details – Radial-Piston Architecture with High-Pressure Optimisation
→ 3-Plunger Radial Configuration: Three plungers positioned at 120° intervals provide a continuous, overlapping fuel flow that minimises pressure pulsations, contributing to the ≤3% pressure ripple specification and ensuring stable injector operation.
→ Case-Carburised Plungers: The plungers are case-carburised to a surface hardness of 62–64 HRC with a case depth of 0.8–1.0 mm, providing wear resistance against abrasive particles while maintaining a tough core – critical for sustained high-pressure operation.
→ Suction Control Valve (SCV): The normally-open solenoid valve modulates the fuel flow entering the pumping chamber, responding to the ECU's rail pressure command in real time. The valve operates at a frequency of 200–400 Hz and incorporates an integrated inlet filter (120 µm) to protect the spool from debris.
→ Fuel-Cooled Lubrication: The pump is lubricated and cooled by the fuel it pumps – a design that eliminates the need for a separate oil supply but requires ultra-clean fuel to prevent plunger scoring and SCV sticking.
→ Precision Cam Plate: The cam plate is ground to a profile tolerance of ±0.02 mm, ensuring consistent plunger lift and maintaining the pump's flow stability across the operating range.