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Discover the critical role of the BY612639000087 Coaxial Pin, a fundamental precision dowel and alignment component engineered for SHACMAN heavy-duty trucks. This genuine OEM part is essential for maintaining exact component positioning and absorbing shear forces within chassis assemblies, suspension linkages, and steering mechanisms. As a trusted source for durable Shacman truck parts, we understand that the integrity of these small components is paramount to vehicle safety and handling. The BY612639000087 is manufactured to SHACMAN’s strict tolerances, ensuring perfect fit and function in high-stress environments.
Its primary role is to guarantee that connected parts, such as leaf spring shackles, torque rods, or stabilizer bar links, pivot and align correctly without unwanted movement or wear. Understanding the importance of this coaxial pin is key for preventive maintenance, suspension rebuilds, and ensuring the structural reliability of your SHACMAN truck under heavy loads.
Coaxial Pin
High-Grade Alloy Steel Construction: The BY612639000087 pin is forged from tough, heat-treated alloy steel, providing exceptional shear strength and resistance to deformation under extreme chassis and suspension loads.
Precision Ground Diameter: Features a consistently smooth, ground surface finish to ensure a perfect slip or press fit into mating bores, eliminating play and maintaining precise alignment of connected components.
Wear-Resistant Surface Treatment: Often treated with processes like induction hardening or nitride coating on the bearing surfaces to dramatically increase surface hardness and resistance to fretting and abrasive wear.
Chamfered or Rounded Ends: Designed with beveled or rounded ends to facilitate easier installation, prevent damage to seal surfaces, and reduce stress concentration points that could lead to cracking.
The table below details the technical specifications for the BY612639000087 Coaxial Pin. This data is crucial for verifying compatibility and ensuring correct assembly in your SHACMAN truck’s chassis systems.
| Parameter | Value / Description |
|---|---|
| OEM Part Number | BY612639000087 |
| Product Name | Coaxial Pin |
| Brand | SHACMAN |
| Primary Material | Alloy Steel (e.g., 4140 or similar) |
| Hardness | Surface Hardness: 45-55 HRC (Case Hardened) |
| Diameter (Nominal) | 20 mm (Application Specific – Example) |
| Length | 120 mm (Application Specific – Example) |
| Surface Finish | Ground / Precision Machined |
| Tolerance Grade | h7 or h8 (Precision Fit) |
| Fit Type | Slip Fit, Light Press Fit (Application Dependent) |
| Primary Application Area | Chassis, Suspension Links, Leaf Spring Shackles, Stabilizer Bars |
Always verify BY612639000087 compatibility with your specific SHACMAN truck model and suspension configuration using your Vehicle Identification Number (VIN) or official service documentation.
The BY612639000087 Coaxial Pin is a vital component in the structural and dynamic systems of SHACMAN trucks. It is commonly used as a pivot pin in leaf spring shackles.
This allows the spring to flex and articulate while maintaining a fixed distance between mounting points. It is also found in the linkages of torque rods and Panhard rods.
In these applications, the BY612639000087 ensures the rod ends are perfectly aligned, transferring forces correctly without binding. It serves as a dowel pin in some assemblies.
Here, it precisely locates two components, like a bracket and a frame member, before bolts are tightened. Its primary function is to handle shear stress.
Unlike bolts that handle tension, the coaxial pin resists forces trying to slide connected parts past each other. This prevents wear and elongation of bolt holes.
A worn or failed BY612639000087 can lead to clunking noises, poor alignment, and accelerated wear in bushings and other suspension components, compromising ride and safety.
1. Safely support the vehicle and relieve load from the suspension component where the BY612639000087 pin will be installed.
2. Thoroughly clean the bores in both mating components. Remove any rust, dirt, or burrs using appropriate tools.
3. Lightly lubricate the pin and the bores with a thin film of appropriate lubricant (e.g., anti-seize) unless specified otherwise by SHACMAN.
4. Carefully align the components and start the BY612639000087 pin by hand, ensuring it enters straight and is not forced or cocked.
5. For press-fit applications, use a proper arbor press or a suitable driver and hammer with a soft face. Apply force evenly.
6. Once fully seated, install and torque any retaining clips, bolts, or cotters pins that secure the BY612639000087 in place.
7. After installation, check the freedom of movement of the joint to ensure no binding has occurred.
• During routine chassis inspections, visually check the area around the BY612639000087 pin for signs of excessive grease leakage from bushings, which may indicate wear.
• Listen for knocking or clunking sounds from the suspension, especially over bumps, which can signal wear or movement of the pin in its bore.
• Check the security of retaining clips or pins during service intervals. Replace any that are damaged, corroded, or missing.
• When replacing bushings or link ends, always inspect the BY612639000087 pin itself for scoring, gouging, or a visible wear step.
• Measure the pin diameter with a micrometer if excessive play is suspected. Compare to OEM specifications for wear limits.
• If a pin is difficult to remove or shows signs of galling, replace it with a new genuine BY612639000087 to prevent future issues.
Proper alignment during installation is critical. Forcing a misaligned pin can damage the precision bores, leading to premature failure of the new pin and associated components.
Choosing the genuine BY612639000087 coaxial pin guarantees the metallurgical properties and dimensional accuracy required for a chassis component. SHACMAN specifies the exact alloy and heat treatment.
Aftermarket pins may be made from softer, lower-grade steel. They may lack proper hardening, leading to rapid wear, galling, and deformation under load.
The genuine BY612639000087 undergoes rigorous quality control for hardness profile, diameter consistency, and surface finish. This ensures a perfect fit and optimal load distribution.
Using the authentic pin maintains the designed durability and safety margins of the suspension and chassis systems. It also helps preserve warranty coverage for related repairs.
Fleet mechanics report that the genuine BY612639000087 pin fits precisely into OEM bores without requiring reaming or other modifications. This saves significant labor time during suspension overhauls.
Off-road and heavy-haul operators note that trucks equipped with genuine chassis pins like the BY612639000087 exhibit less suspension “walk” or component shift over rough terrain.
This contributes to more predictable handling and tire wear. Workshop foremen appreciate the consistent quality of the BY612639000087.
It allows for reliable planning of repair durations, as there are no surprises with out-of-spec parts. The durability of this component in high-mileage applications is well-documented in maintenance records.
A properly functioning BY612639000087 pin contributes to vehicle safety by maintaining correct suspension geometry. This ensures stable braking, handling, and overall vehicle control.
Preventing premature wear through the use of a high-quality pin reduces the frequency of part replacement. This minimizes resource consumption and waste over the vehicle’s lifecycle.
SHACMAN’s manufacturing of such pins focuses on material longevity, which is an inherently sustainable approach compared to using parts that fail quickly.
From a safety standpoint, a failed coaxial pin in a critical suspension link can lead to partial or complete loss of control. Using the genuine, reliable BY612639000087 is a direct safety investment.
Each batch of BY612639000087 coaxial pins is subject to material certification and hardness testing. Dimensional checks are performed using go/no-go gauges or precision measuring instruments.
As an official SHACMAN component, the BY612639000087 is covered by the manufacturer’s standard parts warranty, assuring buyers of its freedom from defects in material and workmanship.
Procuring this part from authorized distributors is the only way to guarantee this warranty protection and to be certain you have received a genuine component, not a counterfeit.
This assurance is critical for commercial operators who need to manage repair liabilities and ensure consistent fleet safety standards.
The genuine BY612639000087 may have a slightly higher initial cost than generic alternatives, but this is offset by its longer service life and role in preventing collateral damage.
A worn pin can elongate bolt holes in expensive brackets or frame members, leading to costly and time-consuming repairs far exceeding the pin’s price.
Its precise fit eliminates labor associated with struggling to install an undersized or oversized pin, or dealing with premature joint failure soon after a repair.
Standardizing on the OEM BY612639000087 across a fleet ensures every truck maintains the same level of suspension integrity, simplifying maintenance protocols and improving overall reliability.
The BY612639000087 coaxial pin is designed for specific mounting points on SHACMAN truck chassis and suspensions. Fitment is determined by the vehicle model, axle type, and suspension configuration.
Pins may look similar but have critical differences in diameter, length, hardness, or the presence of grooves for retaining rings. Using the exact BY612639000087 part number is essential.
Always confirm fitment by referencing the official SHACMAN parts catalog for your truck’s VIN. Do not rely on visual comparisons from other trucks or models.
Correct fitment ensures the pin performs its intended function of providing a precise, wear-resistant pivot or locating point, which is fundamental to vehicle dynamics and safety.
The BY612639000087 Coaxial Pin is a small but mighty guardian of your SHACMAN truck’s alignment and stability, quietly ensuring components work in harmony under immense stress.
Choosing the genuine BY612639000087 is a decisive step towards maintaining factory-level handling, safety, and durability for countless miles ahead.
For your next suspension service or chassis repair, insist on the authentic SHACMAN BY612639000087 Coaxial Pin. Secure the foundation of your vehicle’s performance and drive with the confidence of OEM engineering.
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