The FAW 1129110-81D high pressure oil rail assembly is a core fuel delivery component built for FAW commercial heavy-duty trucks. Manufactured under original OEM specifications, this genuine rail holds pressurized fuel and supplies it steadily to the injectors, protecting your engine from pressure drops and uneven combustion.
⚙️ Reliable Fuel Distribution for Heavy-Duty Diesels
Maintaining stable high pressure across all cylinders is vital to achieving clean combustion and maximum fuel efficiency. The 1129110-81D oil rail delivers dependable performance:
- Stable Pressure Storage: Holds and dampens high-pressure fuel fluctuations to ensure steady delivery to every injector.
- Heavy-Duty Strength: Thick-walled, seamless steel construction resists cracking and high-pressure wear under continuous commercial use.
- Direct OEM Fit: Engineered to match factory port locations and mounting points for quick, reliable installation.
📊 Technical Specifications & Keyword Reference
| Feature | Technical Details |
|---|---|
| Primary OEM Part Number | 1129110-81D |
| Focus Component | High Pressure Oil Rail Assembly |
| Vehicle Compatibility | FAW J6, FAW J6P |
| Product Function | Fuel Accumulation & High-Pressure Distribution |
| Quality Level | Original Equipment Manufacturer (OEM) Standard |
| Wholesale Support | +86 186 7197 8898 |
| S/N | Part number | Part name | Quantity |
| 1 | 111010-73D | High pressure oil pump assembly (High pressure fuel injection pump assembly) | 1 |
| 2 | 111228-81D | High pressure fuel pump connecting flange | 1 |
| 3 | 111216-81D | Fuel injection pump transmission gear | 1 |
| 4 | CQ73421550C (GB3452.1) 155×2.65 | Hydraulic pneumatic rubber O-ring (Rubber O-ring 155 * 2.65 -) | 1 |
| 5 | Q1841030 | Hexagon head flange bolt (Hexagon flange bolt) | 2 |
| 6 | Q1841040 | Hexagon head flange bolt (Hexagon flange bolt) | 2 |
| 7 | CQ1201030 (Q1201030) | Stud | 4 |
| 8 | CQ39610 (Q32010) | Hexagon flange nut | 4 |
| 9 | 111226-59D (1104089-630-0000) | Dowel pin | 1 |
| 10 | 111227-59D (1104088-630-0000) | Sleeve | 1 |
| 11 | 1104030-81D (1104030-M10-0000) | Inlet pipe assembly – fuel transfer pump to fine filter | 1 |
| 12 | 1104040-81D (1104040- M10-0000) | Oil inlet pipe assembly – fine filter to high pressure oil pump (Oil inlet pipe assembly – filter to high pressure pump) | 1 |
| 13 | 1104050-81D | Return pipe assembly | 1 |
| 14 | 1104070-81D | Oil inlet pipe assembly | 1 |
| 15 | 1104036-73D (1104084-81D) | Hollow bolt – oil pump inlet and outlet (Hinged bolt M16×1.5) | 7 |
| 16 | CQ72316T5 (1104101-M11-051B) | Packing washer (Low pressure tubing gasket) | 16 |
| 17 | 1104073-D6 (1104083-81D) | Hollow bolt – oil return pipe (Hinged bolt M14×1.5) | 2 |
| 18 | CQ72314T5 (Q/WC3455 14PB) | Packing washer (Combination washer) | 4 |
| 19 | 1117030-60D (1104084-81D) | Hollow bolt (Hinged bolt M16×1.5) | 1 |
| 20 | 1104076-53D (1104082-81D) | Hollow bolt-oil lubrication pipe assembly (Hinged bolt M12×1.25) | 1 |
| 21 | CQ72312T5 (Q/WC3455 12PB) | Packing washer (Combination washer) | 2 |
| 22 | 1104076-73D (1104081-81D) | Hollow bolt-injection pump oil inlet (Hinged bolt M10×1) | 1 |
| 23 | CQ72310T5 (Q/WC3455 10PB) | Packing washer (Combination washer) | 2 |
| 24 | 1112010-51B 1112010-M10-0000 | Fuel injector assembly | 6 |
| 25 | 1112011-81D | Pressure plate, fuel injector | 6 |
| 26 | 1112013-81D | Injector pressure plate bolt | 6 |
| 27 | 1112014-81D | Spherical washer | 6 |
| 28 | 1112030-81D | High pressure fuel line connecting pipe assembly | 6 |
| 29 | 1112031-29D | Intermediate compression nut – high pressure fuel line connecting pipe | 6 |
| 30 | 1129010-81D | First cylinder high pressure fuel line assembly | 1 |
| 31 | 1129020-81D | Second cylinder high pressure fuel line assembly | 1 |
| 32 | 1129030-81D | Third cylinder high pressure fuel line assembly | 1 |
| 33 | 1129040-81D | Fourth cylinder high pressure fuel line assembly | 1 |
| 34 | 1129050-81D | Fifth cylinder high pressure fuel line assembly | 1 |
| 35 | 1129060-81D | Sixth cylinder high pressure fuel line assembly | 1 |
| 36 | 1129070-81D | High pressure fuel line assembly I | 1 |
| 37 | 1129080-81D | High pressure fuel line assembly II | 1 |
| 38 | 1129090-73D | High pressure pipe clip assembly I | 1 |
| 39 | 1129110-81D | High pressure oil rail assembly | 1 |
| 40 | Q1840835 | Hexagon head flange bolt (Hexagon flange bolt) | 3 |
❓ Frequently Asked Questions (Technical & Buying Guide)
Q: What is the main function of the 1129110-81D high pressure oil rail assembly? A: It acts as a reservoir that stores high-pressure diesel fuel from the pump and distributes it evenly to each fuel injector.
Q: When should a high pressure fuel rail be replaced? A: It should be replaced if you experience persistent fuel rail pressure leaks, stripped mounting threads, or internal cracking that prevents proper pressure buildup.
Q: How do I verify that part number 1129110-81D fits my engine? A: You can check your parts catalog or send your FAW truck chassis VIN and engine serial number to our technical support team via WhatsApp at +86 186 7197 8898 for instant confirmation.
🤝 Global Wholesale & Export Enquiries
We export genuine FAW heavy-duty engine, fuel system, and commercial truck components to fleet managers, maintenance hubs, and automotive spare parts distributors worldwide. Contact us today for competitive bulk pricing and fast international shipping.
