Fuel Feed Pump OEM Part Number 8-97223289-0 with Plunger Pre-Stroke 4.1 ± 0.05 mm and 12 Months Warranty for ISUZU 4HF1 NPR
| OEM Part Number: | 8-97223289-0 / 8972232890 | Plunger Pre-Stroke: | 4.1 ± 0.05 Mm (No.1 Plunger) |
| Injection Order: | 1-3-4-2 | Fuel System Type: | Mechanical Injection Pump (Indirect Injection) |
| Engine Compatibility: | ISUZU 4HF1 | Material: | High-strength Cast Housing, Wear-resistant Internal Components |
| Cooling Type: | Engine Coolant Circulation | Displacement: | 4.3L (4325cc) |
| High Light: | OEM Part Number 8-97223289-0 Fuel Feed Pump,Plunger Pre-Stroke 4.1 ± 0.05 mm Injection Pump Fuel Feed Pump Assembly,12 Months Warranty Mechanical Feed Pump |
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The Injection Pump Fuel Feed Pump Assembly with OEM number 8-97223289-0 (also listed as 8972232890) is a verified direct-fit replacement for ISUZU NPR trucks equipped with the 4HF1 diesel engine. This mechanical feed pump is responsible for drawing fuel from the tank and supplying it at the correct pressure to the main injection pump, ensuring consistent, air-free fuel supply for optimal engine performance.
✅Proven Durability: Built with wear-resistant materials — rated for 400,000+ km under normal operation.
✅Installation Success Rate: 99% direct bolt-on fitment — confirmed across thousands of repair orders.
✅OEM Cross-Reference Verified: Genuine ISUZU part number for the 4HF1 injection pump fuel feed system.
If your fuel feed pump is failing, you may experience one or more of the following symptoms:
- Hard Starting / Extended Cranking: Engine takes longer than normal to start
- Loss of Engine Power: Significant reduction in power and acceleration
- Engine Stalling / Rough Running: Intermittent stalling or rough idle
- Fuel System Air Ingestion: Air bubbles requiring frequent priming
- Visible Fuel Leakage: Fuel seeping from the pump body
| Part Number | 8-97223289-0 8972232890 |
|---|---|
| Product Name | Fuel Feed Pump |
| Car Model | ISUZU NPR |
| Engine Model | ISUZU 4HF1 |
| Condition | 100% Brand New |
| Material | High-strength aluminum alloy & precision bearings |
| Installation | Direct OEM replacement |
| Quality Standard | OEM equivalent / ISO quality control |
| Brand | Model | Engine | Application |
|---|---|---|---|
| ISUZU | NPR | 4HF1 | Medium-duty transport |
| ISUZU | NKR | 4HF1 | Light/medium-duty transport |
| Engine Code | Displacement | Fuel Type | Injection Type |
|---|---|---|---|
| 4HF1 / 4HF1-2 | 4.3L (4325cc) | Diesel | Mechanical (Indirect Injection) |
• Designed for ISUZU 4HF1 and 4HF1-2 diesel engines
• Fits ISUZU NPR and NKR commercial truck models
• Mechanical feed pump (not electric in-tank pump)
• Compatible with indirect fuel injection system
| QC Item | Verification Method |
|---|---|
| Dimensional Accuracy | Precision inspection to match OE blueprint specifications |
| Fuel Flow Rate Test | Bench testing to verify OEM fuel delivery volume |
| Pressure Test | Pressure testing to verify output pressure specifications |
| Seal Integrity Test | 100% leak test to guarantee zero fuel leakage |
| Diaphragm Durability Test | 500+ hour cyclic testing for long-term reliability |
| Final Assembly Inspection | 100% visual and functional inspection |
Pre-Installation Checklist:
- Ensure the engine is cool before starting work
- Depressurize the fuel system before disconnecting fuel lines
- Clean the area around the pump to prevent contamination
- Inspect fuel lines for cracks or damage — replace if necessary
Installation Guidelines:
- Disconnect the negative battery terminal
- Depressurize the fuel system
- Disconnect fuel inlet and outlet lines from old pump
- Remove mounting bolts securing pump to engine
- Remove old pump assembly
- Clean mounting surface thoroughly
- Install new pump with new gasket (if applicable)
- Torque mounting bolts to manufacturer's specifications
- Reconnect fuel lines securely
- CRITICAL: Prime fuel system until fuel flows free of air bubbles
- Start engine and check for fuel leaks
- Check for proper fuel flow and engine operation
Maintenance Schedule:
- Inspection: Every 50,000 km / 12 months
- Replacement: Immediately if failure symptoms appear
- Note: The 4HF1 engine's mechanical injection system is known for simplicity and reliability
Each fuel feed pump is securely packed in protective packaging to prevent shipping damage. Suitable for wholesale distributors, truck parts retailers, commercial vehicle repair shops, and fleet owners.
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