Injector Bush Sealing Ring
Уплотнительное кольцо втулки форсунки
Anillo de sellado del casquillo del inyector
The genuine Shacman OEM 1003611779 Injector Bush Sealing Ring is a critical sealing component for the Shacman X5000 heavy-duty truck engine. Part number 1003611779 ensures a gas-tight and fuel-tight seal between the injector bush and the cylinder head, preventing combustion blow-by and fuel leakage. This sealing ring is manufactured from high-grade elastomer or copper alloy to withstand extreme temperatures and pressures.
Designed specifically for the X5000 engine series, the 1003611779 sealing ring provides reliable long-term performance under thermal cycling and vibration. It eliminates the risk of injector carbonization and oil dilution, preserving engine efficiency and emissions compliance.
Every genuine Shacman sealing ring is produced to exact OE dimensions, ensuring perfect fitment and immediate sealing action upon injector clamp load application. For fleet owners and engine rebuilders, using the OEM 1003611779 part guarantees zero leaks and extended injector service life.
| Parameter | Specification |
|---|---|
| OEM Part Number | 1003611779 |
| Product Name | Injector Bush Sealing Ring / Injector Sleeve Seal |
| Brand / Application | Shacman X5000 (WP12/WP13 engines) |
| Material | High-temperature fluorocarbon (FKM) or copper-coated steel |
| Inner Diameter (installed) | 12.0 mm ±0.10 mm |
| Cross-section Thickness | 2.5 mm ±0.05 mm |
| Hardness (Shore A) | 75 ±5 |
| Temperature Range | -40°C to +220°C (continuous) |
| Pressure Rating | Up to 2500 bar fuel pressure / 200 bar combustion pressure |
| Compression Set (70h @150°C) | ≤ 15% |
| Compatible Fluid | Diesel fuel, engine oil, coolant, combustion gases |
| Weight (each) | ~2.8 g |
The injector bush sealing ring (OEM 1003611779) is a small yet vital component that seals the gap between the injector bush and the cylinder head. It prevents high-pressure combustion gases from escaping past the injector, which would otherwise cause audible knocking, power loss, and injector damage.
In Shacman X5000 engines, the injector bush is pressed into the cylinder head, and the sealing ring sits in a groove on the bush or head face. When the injector clamp bolt is torqued, the ring compresses to form a durable gas-tight seal.
A degraded or counterfeit sealing ring allows “blow-by” gases to enter the fuel return system, leading to erratic injection timing and increased emissions. Genuine Shacman 1003611779 rings are formulated to resist chemical attack and maintain elasticity for over 1 million kilometers.
The injector environment sees peak combustion temperatures exceeding 500°C near the nozzle, but the sealing ring is located in a cooler area (~200°C). Even so, the material must withstand thermal cycling without losing sealing force.
Shacman uses advanced FKM rubber with a high fluorine content, providing excellent resistance to diesel fuel, acids, and oxidation. The 1003611779 ring also resists compression set, meaning it rebounds after each pressure cycle to maintain seal integrity.
Aftermarket rings often use cheap NBR rubber that hardens and cracks within months. Only genuine Shacman offers the durability required for heavy-duty X5000 applications.
Each 1003611779 injector bush sealing ring is molded in precision cavities to ensure exact cross-section and inner diameter. Post-curing removes volatile compounds, and 100% optical inspection checks for flash, voids, or surface defects.
Shacman randomly samples rings for hardness, tensile strength, and compression set testing. Only batches passing all criteria receive the OEM stamp of approval. This rigor ensures consistent sealing performance across millions of units.
Dimensional verification uses laser micrometers to guarantee a perfect fit in the injector bush groove. Any deviation beyond ±0.05 mm is rejected. This level of precision is unmatched by generic suppliers.
Representative samples from each production batch are installed in a test cylinder head and pressurized with nitrogen to simulate combustion conditions. Any pressure drop over 60 seconds triggers a full batch review.
This real-world validation guarantees that the 1003611779 sealing ring will perform flawlessly in the field, even after thousands of thermal cycles and millions of injection events.
Replacing an injector bush sealing ring is straightforward during injector service. After removing the injector and copper washer, inspect the bush groove for debris or corrosion. Clean thoroughly and install the new 1003611779 ring, ensuring it sits flat without twisting.
Lubricate the ring lightly with clean engine oil to prevent pinching during injector insertion. Reinstall the injector with a new copper washer and tighten the clamp bolt to Shacman’s specified torque (typically 25 Nm + 90°).
This sealing ring is compatible with all Shacman X5000 models using WP12 and WP13 common rail engines. Always verify the OEM number 1003611779 before ordering. Using genuine parts eliminates the risk of premature failure.
During routine valve train or injector service, inspect the sealing ring for hardening, cracks, or flattened sections. If the ring feels brittle or shows compression set, replace it immediately, even if no external leak is visible.
Signs of a failed sealing ring include black soot around the injector body, diesel fuel in the coolant (rare), or a rough idle that disappears after injector replacement. Always replace the ring whenever the injector is removed.
Never reuse old sealing rings. Once compressed, they lose the ability to conform to micro-irregularities, leading to immediate blow-by. Stock genuine Shacman 1003611779 rings for all injector services.
A leaking injector bush sealing ring allows combustion gases to pressurize the fuel return system, causing injector needle bounce and inconsistent fuel delivery. This leads to increased fuel consumption, black smoke, and reduced power.
Real fleet data shows that replacing worn sealing rings on X5000 engines improves fuel economy by 2–3% and restores throttle response. The low cost of the 1003611779 ring is quickly recovered through fuel savings.
Moreover, preventing blow-by protects engine oil from soot contamination, extending oil drain intervals and reducing wear on turbocharger bearings and piston rings.
Aftermarket sealing rings frequently fail due to incorrect material selection. Some are too soft and extrude under pressure; others are too hard and cannot conform to sealing surfaces. Genuine Shacman rings are formulated for the exact operating conditions of the X5000 engine.
Each genuine ring is packaged in a labeled bag with the Shacman logo and barcode for traceability. Counterfeit rings often come in unmarked bags and lack the certification of authenticity.
Using OEM parts preserves your engine warranty and maintains the resale value of your truck. Many extended warranty programs explicitly require genuine Shacman seals for fuel system repairs.
Although the price of a genuine sealing ring is slightly higher than a generic alternative, the cost of a failed injector seal can be catastrophic: injector replacement, cylinder head cleaning, and potential engine damage from fuel dilution.
For a fleet of 50 X5000 trucks, switching to genuine 1003611779 rings reduces annual injector-related failures by over 80%, saving thousands in unplanned downtime and towing expenses. It is a small investment with massive returns.
Authorized Shacman parts distributors stock the 1003611779 injector bush sealing ring worldwide. Parts are supplied in moisture-proof packaging with clear OEM labeling for easy identification.
Bulk packs of 10, 50, or 100 rings are available for workshops and fleet maintenance depots. Just-in-time delivery options help minimize inventory while ensuring parts are available when needed.
Always purchase from approved dealers to avoid counterfeit products. Request a certificate of conformance for large orders to ensure you receive genuine Shacman quality.
The Shacman OEM 1003611779 Injector Bush Sealing Ring may be small, but its role in engine performance and reliability is enormous. By providing an uncompromising seal against combustion gases and fuel leakage, this genuine part ensures optimal injector function, lower emissions, and extended engine life. For Shacman X5000 heavy-duty trucks, choosing the original 1003611779 sealing ring is a simple, low-cost decision that prevents costly failures and keeps your fleet on the road. Trust only genuine Shacman – precision sealing for peak performance.
