Ensemble de frein arrière gauche russe FAW: Déconstruction 49 Éléments stratégiques pour un contrôle inflexible de l’Arctique

Le Frein arrière gauche russe FAW assembly is the heavy-duty deceleration powerhouse for the drive axles of the CA3250P66K24L1TE5Z dump truck. Engineered to handle the immense kinetic energy of a fully loaded 30-ton vehicle, this system utilizes a widened drum geometry and reinforced friction materials specifically cured for the thermal extremes of the Russian winter. Whether navigating steep quarry descents or braking on icy highways, le Frein arrière gauche russe FAW ensures stability and fade-free performance. This guide breaks down the S-cam actuation, structural mounting, and critical wear components that define this essential safety system.

Frein arrière gauche russe FAW

Heavy-Duty Friction Architecture

Le Frein arrière gauche russe FAW distinguishes itself with a significantly robust friction coupling designed for the tandem drive axles. The assembly utilizes 410mm diameter drums coupled with the massive Rear Brake Shoe (Partie no. 3502391-A6E). Unlike the front axle, the rear shoes carry a much larger surface area of friction material, split into Rear Friction Lining I (Partie no. 3502406-A6E) et Rear Friction Lining II (Partie no. 3502407-A6E). This segmented design prevents thermal stress cracking by allowing for differential expansion across the lining surface during prolonged braking events in the Russian tundra.

Structural rigidity is paramount. Le Rear Brake Bracket (Partie no. 3502021-A0E) serves as the anchor point, bolted directly to the axle housing with high-tensile Boulon de verrouillage – For Fastening Rear Brake Bracket (Partie no. 3502038-1H). This bracket must withstand torque loads exceeding 25,000 Nm without deflection. Le Rear Brake Shoe Axle / Anchor Pin (Partie no. 3502086-A6E) provides the pivot point for the shoes. In this heavy-duty specification, these pins are hardened to resist ovalization, ensuring that the brake geometry remains precise over hundreds of thousands of kilometers.

Retention of the friction components is managed by the Retour printemps (Partie no. 3502436-A0E). These springs are critical for dragging the heavy shoes away from the drum immediately after the pedal is released. Dans le Frein arrière gauche russe FAW, these springs are cadmium-plated to resist corrosion from road salts used on icy Russian highways. Failure of these springs leads to brake drag, overheating, and potentially wheel-end fires, making their inspection a priority during maintenance.

Camshaft Actuation and Adjustment

The actuation force in the Frein arrière gauche russe FAW is delivered through the Rear Left Brake Camshaft (Partie no. 3502151-A6E). This component features an S-profile optimized for the longer stroke required by the rear brakes. It is supported by a sophisticated bearing system involving the Camshaft Joint Bearing Assembly (Partie no. 3502135-A0E). This spherical bearing design accommodates slight axle flex under heavy loads without binding the camshaft, a common failure mode in rigid bearing designs.

Driving the camshaft is the Rear Axle Left Automatic Adjuster Arm Assy (Partie no. 3502205-A0E). This Haldex-style adjuster senses the clearance between the lining and the drum on every stroke. If the gap exceeds the factory specification due to wear, the internal worm gear ratchets forward, maintaining optimal braking efficiency. This automatic adjustment is crucial for the Frein arrière gauche russe FAW, as manual adjustment of 8 rear wheel positions in -40°C weather is both impractical and dangerous.

The interface between the S-cam and the shoes is smoothed by the Rear Brake Shoe with Roller Assembly (Partie no. 3502375-A6E). This assembly includes the Brake Shoe Roller (Partie no. 3502392-A0E) et Arbre à rouleau (Partie no. 3502394-A0E). These rollers reduce mechanical hysteresis, ensuring that the brakes apply and release linearly with pedal pressure. Le Roller Bushing (Partie no. 3502393-A0E) is internally lubricated, preventing the roller from seizing and flat-spotting, which would cause a pulsating brake pedal.

Sealing and Environmental Defense

Operating in the muddy, gritty environment of a mine site requires exceptional sealing. Le Frein arrière gauche russe FAW features a multi-barrier defense system. The primary barrier is the Rear Brake Rear Dust Shield (Partie no. 3502031-A0E) et Rear Brake Front Dust Shield (Partie no. 3502032-A0E). These stamped steel shields interlock to encase the drum, preventing rocks from entering and damaging the friction surfaces. The inspection ports are sealed with the Prise – Dust Shield Inspection Hole (Partie no. 3501034-02), allowing for quick visual checks without disassembly.

Internal contamination is prevented by the Oil Seal – Camshaft Bracket (Partie no. 3502153-A0E). This double-lipped seal keeps the chassis grease inside the camshaft bracket and prevents water ingress. A failure here would allow water to wash away the lubricant, leading to camshaft corrosion and seizure. The assembly also uses the Siège – Oil Seal (Partie no. 3502124-A0E) to position the seal correctly, ensuring consistent lip pressure on the shaft regardless of thermal expansion.

Even the smaller components are designed for retention. Le Plaque de verrouillage – Brake Shoe Axle Retainer Bolt (Partie no. 3501087-4E) acts as a mechanical fuse, preventing the anchor pins from backing out under vibration. The use of multiple Shaft Snap Ring (Partie no. Q43112) units ensures that the roller shafts and pivot pins remain captive. This attention to detail prevents catastrophic disassembly of the Frein arrière gauche russe FAW during operation.

Maintenance and Power Application

The brute force required to actuate the rear brakes is provided by the Rear Axle Left Spring Cylinder with Quick Connector Assy (Partie no. 3530025-896-C00). This dual-chamber actuator provides both service braking via air pressure and parking/emergency braking via a powerful internal spring. It is mounted to the Support Plate – Spring Brake Cylinder (Partie no. 3502126A483). This heavy-gauge plate prevents the cylinder from flexing under load, ensuring that 100% of the pushrod force is directed into the slack adjuster.

Maintenance access is facilitated by the Straight Grease Fitting (Partie no. CQ70001). Located on the camshaft brackets and the slack adjuster, these fittings allow mechanics to purge old, contaminated grease and replace it with fresh low-temperature lubricant. Le Brake Adjustment Shim (Partie no. 3501156A392) allows for fine-tuning of the camshaft end-play. Excessive end-play causes the S-cam to walk laterally, leading to uneven lining wear. Correct shimming is a critical step in rebuilding the Frein arrière gauche russe FAW.

Enfin, the integration of ABS is supported by the Rear Wheel Speed Sensor Bracket (Partie no. 3605366-93W). This bracket positions the sensor within millimeters of the tone ring. A stable bracket is essential for preventing sensor drop-out signals which would trigger ABS fault codes. By maintaining the Frein arrière gauche russe FAW with genuine components like the Rivet – Brake Lining (Partie no. 3502408-A0E), operators ensure that the vehicle remains compliant with safety regulations and capable of stopping safely in any condition.

Conclusion: The Backbone of Heavy Haulage

Le Frein arrière gauche russe FAW is a masterpiece of heavy-duty engineering, comprised of 49 strategic components working in concert. From the massive clamping force of the Rear Axle Left Spring Cylinder to the precise modulation of the Rear Left Brake Camshaft, every element is designed for durability and safety. The robust sealing and automatic adjustment features minimize downtime and maximize operational efficiency in the harshest environments on earth.

For fleet owners, the path to reliability lies in using genuine parts. Substituting critical items like the Rear Brake Shoe or the Retour printemps with inferior aftermarket alternatives compromises the safety of the entire vehicle. By adhering to the specifications outlined in this breakdown of the Frein arrière gauche russe FAW, operators invest in the long-term performance and safety of their fleet.