The BY612630090002 is the genuine Shacman Injector Clamp, a vital yet often overlooked component in your truck’s diesel engine. This crucial bracket is responsible for securely fastening the fuel injector to the cylinder head. Engineered for exact fitment and maximum durability, the OEM part BY612630090002 ensures that the high-precision injector remains perfectly positioned under extreme pressure and vibration. A loose or failed clamp can lead to injector movement, causing leaks, poor combustion, and severe engine damage.
Manufactured from high-grade steel, this clamp is designed to withstand the intense heat and mechanical stresses of the engine environment. Using the correct Shacman BY612630090002 clamp guarantees the injector’s seal integrity, maintains optimal engine performance, and prevents costly secondary failures. It is an essential part of any professional fuel system repair or overhaul, ensuring reliability mile after mile.
| Parameter | Specification | Details |
|---|---|---|
| OEM Part Number | BY612630090002 | Genuine Shacman Identification |
| Product Name | Injector Clamp / Bracket | Fuel injector hold-down clamp |
| Brand | Shacman | Original Equipment Manufacturer |
| Material | High-Tensile Steel | Forged or stamped for strength |
| Surface Treatment | Anti-Corrosion Coating/Plating | Protects against heat and moisture |
| Compatibility | Specific Shacman Engine Models | Designed for precise injector type |
| Included Hardware | Bolt(s) / Stud(s) | May be sold separately or as kit |
| Function | Secure Fuel Injector | Applies correct clamping force |
| SEO Description | Genuine Shacman Injector Clamp BY612630090002. OEM hold-down bracket ensures fuel injector stability, prevents leaks, and protects engine performance. Essential for reliable operation. | |
The Injector Clamp BY612630090002 performs a deceptively simple yet absolutely critical function. It is the mechanical link that holds the fuel injector firmly seated in the cylinder head. Modern diesel injectors are subjected to immense internal fuel pressure, often exceeding 2,000 bar, and the explosive force of combustion.
Without a secure clamp, these forces could cause the injector to lift or vibrate. This movement breaks the crucial seal between the injector and the cylinder head, leading to compression loss, combustion gas leaks, and external fuel leaks. The clamp ensures all the engine’s power is used to drive the pistons, not to dislodge components.
The clamp’s role extends beyond simple retention. It applies a specific, engineered clamping force. This force is calculated to compress the injector’s copper sealing washer correctly, creating a gas-tight and liquid-tight seal without over-stressing and cracking the delicate injector body or the cylinder head.
Precision-Engineered Fit: The BY612630090002 is not a universal part. It is contour-mapped to fit the exact shape of the specific Shacman injector and the mounting boss on the cylinder head. This eliminates stress points and ensures even force distribution across the injector’s shoulder.
Optimal Material Strength: Made from high-tensile steel, it is strong enough to resist stretching or permanent deformation (creep) under constant high temperature and load. This maintains the correct clamping force throughout the engine’s service life.
Heat and Corrosion Resistance: The clamp operates in a hostile environment. OEM surface treatments like plating or coating protect against rust and oxidation, which could otherwise weaken the metal or cause it to fuse to the cylinder head studs, making removal difficult.
Consistent Clamping Force: Its design and material consistency ensure that when torqued to specification, it applies the same force as every other clamp in the factory engine. This uniformity is vital for balanced performance across all cylinders.
Cleanliness and Inspection: Before installing the new BY612630090002 clamp, clean the mating surfaces on the cylinder head and injector. Inspect the clamp for any cracks or deformation. Never reuse a clamp that is bent, corroded, or shows signs of fatigue.
The Critical Role of Torque: This is the most important step. Always use a calibrated torque wrench. The clamp bolt must be tightened to the exact Newton-meter (Nm) value specified in the Shacman service manual. Overtorquing can crack the injector or head; undertorquing will lead to a leak.
Correct Torque Sequence: For clamps using two bolts, follow a cross-torquing pattern. Tighten in steps (e.g., 50% of final torque, then 100%) to apply force evenly. This prevents cocking the injector in its bore, which would damage the seal.
Use of New Hardware: Always use a new clamp bolt. These bolts are often “torque-to-yield” (TTY), meaning they are designed to stretch slightly during final torque to provide a precise clamping load. A reused TTY bolt may already be stretched and can snap.
Watch for these warning signs: 1) External Fuel or Oil Leak: Visible wetness around the injector base. 2) Hissing Sound: Combustion gases escaping past the injector seal. 3) Poor Engine Performance: Loss of compression in that cylinder. 4) Soot Around Injector: Black carbon buildup from leaking combustion gases. 5) Misfire Codes: ECU detects cylinder imbalance.
A cheap, non-OEM clamp may look similar but can have catastrophic differences. It may be made from inferior, softer steel that relaxes under heat, losing clamping force. Its dimensions might be slightly off, applying pressure unevenly and cracking the injector.
The failure of a $50 clamp can destroy a $500 injector and cause extensive damage to the cylinder head—a repair costing thousands. The genuine Shacman BY612630090002 is a quality-assured safety component, not a place to cut corners. It protects your much larger investment in the engine.
Injector clamps are highly specific. The BY612630090002 is designed for a particular Shacman engine family and injector model. Using an incorrect clamp, even from another Shacman engine, can have serious consequences. The injector height, bolt hole spacing, and curvature must all match perfectly.
When replacing injectors, always inspect the clamps. It is standard best practice to replace the clamp whenever the injector is replaced. The old clamp has been heat-cycled and stressed; a new BY612630090002 ensures a reliable foundation for the new, precision component.
Injector clamps come in various designs: single-bolt “yoke” styles, two-bolt rectangular brackets, or integrated rocker arm pedestals. The BY612630090002 will match the original equipment design for its application. Each design transfers the bolt’s clamping force to the injector in a specific way.
Some clamps also incorporate features like alignment tabs or grooves that ensure the injector is clocked (rotated) to the correct position for its electrical and fuel connections. The genuine part guarantees all these ancillary functions are preserved.
The injector clamp itself does not have a scheduled replacement interval. However, it should be critically inspected anytime the valve cover is off for service or during any injector-related repair. Look for cracks, especially near the bolt holes, and significant corrosion.
Proactive replacement is highly recommended during major engine work or when symptoms point to an injector seal leak. Given its low cost relative to the components it protects, replacing the BY612630090002 clamp is inexpensive insurance against future problems and downtime.
The clamp works as part of a system. It interacts directly with the injector’s mounting shoulder, the cylinder head’s machined boss, the sealing washer, and the clamp bolt. The performance of the seal depends on all these components being in good condition and correctly assembled.
If a leak persists after replacing an injector and clamp with genuine BY612630090002, inspect the sealing surface on the cylinder head for pitting or damage. The clamp can only do its job if the surface it pulls the injector against is flat and smooth.
The Shacman Injector Clamp (OEM: BY612630090002) is a quintessential example of a component where engineering precision meets brute-force reliability. It is the steadfast guardian that keeps the high-tech injector securely anchored, enabling it to perform its delicate task amidst the chaos of combustion.
Never underestimate its importance. For a secure, leak-free, and efficient engine, always insist on the genuine Shacman clamp designed for your engine. The BY612630090002 is a small part that plays a massive role in your truck’s health and productivity.
