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Maintaining peak braking performance is non-negotiable for the safety and efficiency of any heavy-duty truck. At the core of this critical system lies the automatic slack adjustor, a component that ensures consistent brake shoe-to-drum clearance. The genuine 131402010422A001 Slack Adjustor is a precision-engineered masterpiece from SANY, designed to deliver reliable, automatic adjustment for SANY trucks and compatible heavy vehicles.
As a vital component within the realm of authentic SANY parts, the 131402010422A001 plays an indispensable role in compensating for brake lining wear. By automatically maintaining the optimal clearance, it ensures maximum braking force is available with every pedal application, directly contributing to shorter stopping distances, reduced maintenance intervention, and enhanced overall vehicle safety.
Slack Adjustor (Brakes)
Регулятор зазора (Тормоза)
Ajustador de Holgura (Frenos)
In an S-cam air brake system, the slack adjustor is the vital mechanical link between the brake chamber and the brake camshaft. Its primary function is to convert the linear pushrod force from the brake chamber into the rotational motion needed to turn the S-cam, which then spreads the brake shoes against the drum. More importantly, the automatic feature of the 131402010422A001 model continuously monitors and compensates for brake lining wear.
Each time the brakes are applied and released, its internal mechanism senses if the stroke of the brake chamber pushrod has exceeded a pre-set optimal range. If excessive stroke is detected, the adjustor automatically takes up the slack by turning the adjustment worm gear, thereby reducing the clearance between the brake shoe and the drum to its ideal setting.
This automatic function of the 131402010422A001 is crucial for maintaining consistent brake response. Without it, as brake linings wear, the chamber pushrod would have to travel further to apply the brakes, leading to increased brake lag, reduced braking power, and potentially a complete loss of braking efficiency. A properly functioning SANY slack adjustor ensures that the braking system always operates within its designed parameters, providing the driver with reliable stopping power and protecting the entire brake system from the excessive wear and heat generated by over-stroking chambers.
The SANY Slack Adjustor, part number 131402010422A001, is built to withstand the harsh, high-torque environment of heavy-duty braking. It features a rugged, sealed housing typically constructed from high-grade forged or ductile iron, providing exceptional strength and impact resistance. Inside, a precision-machined worm gear and pawl mechanism form the heart of the automatic adjustment function. This mechanism is engineered for reliability, with heat-treated gear teeth to resist wear and a robust clutch or ratchet design that prevents over-adjustment and back-driving.
The table below details the key technical parameters for the SANY Slack Adjustor. Accurate reference to this data ensures correct part selection, compatibility verification, and adherence to the vehicle’s braking system specifications.
| Parameter | Specification |
|---|---|
| OEM Part Number | 131402010422A001 |
| Product Name | Slack Adjustor (Brakes) |
| Brand | SANY |
| Type | Automatic, Single Chamber |
| Adjustment Ratio | Industry Standard (e.g., 6.74:1) |
| Spline Size | Specified for SANY Camshaft |
| Housing Material | High-Strength Forged Iron |
| Torque Capacity | Rated for Heavy-Duty Application |
| Manual Adjustment | Standard Hex (e.g., 9/16″) |
| Application | SANY Truck Rear Axle Brake Assembly |
Proper installation of the 131402010422A001 slack adjustor is critical for safety. The process begins with safely securing the vehicle and releasing the parking brakes. The old adjustor is disconnected from the brake chamber pushrod and the camshaft. Before installing the new genuine 131402010422A001, the camshaft splines and the adjustor’s clevis pin should be cleaned and lightly lubricated with high-temperature grease. The adjustor is then slid onto the camshaft splines and the clevis is connected to the brake chamber pushrod.
The most crucial step is setting the initial “bench” adjustment. Using the manual hex, the adjustor is turned until the brake shoes are firmly locked against the drum. Then, it is backed off a specified number of clicks (typically as per the manufacturer’s manual, e.g., 1/2 to 3/4 turn) to establish the correct starting clearance. Failure to set this correctly can lead to immediate brake drag or excessive stroke. After installation, the brake system must be tested for proper operation and stroke measurements must be verified to be within legal and safe limits.
A malfunctioning slack adjustor poses a direct safety risk. Common symptoms of a failing 131402010422A001 unit include excessive brake chamber stroke (visibly measured during a brake application), which is a primary indicator that the automatic adjustment mechanism is not working. This leads to a soft or low brake pedal, reduced braking power, and longer stopping distances. Conversely, an adjustor that seizes or over-adjusts will cause the brakes to drag, leading to excessive heat, premature lining wear, and a noticeable fuel economy drop.
Regular preventative maintenance is essential. During routine service intervals, technicians should manually check the adjustment by marking the adjustor’s hex, applying the brakes to settle the shoes, and then attempting to turn the adjustor. If it turns easily beyond a click or two, it indicates excessive slack and the need for manual adjustment or replacement. The condition of the 131402010422A001 should also be visually inspected for physical damage, severe corrosion, or grease leakage from the seals.
The genuine 131402010422A001 is engineered to the exact dimensions and performance specifications of SANY’s braking system. This ensures perfect spline engagement, correct adjustment ratio, and seamless integration with the brake chamber and camshaft, delivering the precise braking response the vehicle was designed for.
Constructed from premium materials and subjected to rigorous testing, the OEM adjustor offers superior resistance to wear, corrosion, and high-temperature degradation. Its robust sealed design protects the internal mechanism, ensuring reliable automatic adjustment over a long service life, even in the toughest operating conditions.
Using the certified 131402010422A001 helps maintain the vehicle’s braking system within regulated safety standards. Consistent proper clearance minimizes brake fade, ensures shorter stopping distances, and provides the driver with reliable pedal feel, which are all critical factors for road safety and regulatory compliance.
The SANY Slack Adjustor, OEM number 131402010422A001, is far more than a simple mechanical link; it is the intelligent, self-regulating heart of the foundation brake system. Its consistent and precise operation is fundamental to maintaining the braking performance that heavy-duty trucks depend on for safe daily operation. Neglecting this component can lead to a cascade of problems, from increased maintenance costs due to uneven lining wear to the ultimate risk of brake failure.
Therefore, specifying the genuine 131402010422A001 during service or repair is a proactive decision that safeguards vehicle performance, operator safety, and fleet reliability. It is the recommended choice for fleet managers, owner-operators, and service technicians who prioritize safety and understand that the integrity of every journey begins with a fully functional braking system. Trust in the OEM component to keep your SANY truck’s stopping power consistently at its peak.
Brake system maintenance, including the service or replacement of the slack adjustor 131402010422A001, must be performed by qualified personnel following the official SANY service procedures. Incorrect installation or adjustment can compromise braking performance and safety. Always perform a full brake system inspection and functional test after any service work. Regular checks of brake chamber stroke are a legal requirement and a critical safety practice.
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