19 Robust Components of Sinotruk Howo Short Cab Rear Suspension

The Sinotruk Howo Short cab rear suspension is engineered for maximum durability, driving comfort and load stability in modern heavy trucks. This advanced suspension system ensures a smoother ride, protects the chassis from impact, and maintains excellent wheel contact even on rough terrains. As part of the comprehensive range of Sinotruk Howo Parts, the Sinotruk Howo Short cab rear suspension is built to the highest OEM standards, guaranteeing a perfect fit and long service life for your fleet. For more technical insights, you can also explore global Sinotruk resources to cross-reference specifications.

Sinotruk Howo Short cab rear suspension – Precision engineered for performance and safety

Sinotruk Howo Short Cab Rear Suspension: Component Breakdown

Every component in the Sinotruk Howo Short cab rear suspension is designed to work in perfect harmony. Below you will find detailed descriptions for each key part listed in the official parts catalog under “Designation”. This deep dive helps you understand the engineering excellence behind this suspension system.

Left lower bracket (AZ1642440132)

The left lower bracket is a forged or cast mounting point that connects the rear suspension linkage to the chassis frame on the driver’s side. It provides a rigid foundation for the shock absorber and stabilizer linkage, ensuring precise geometry control during articulation and heavy braking.

Right lower bracket (AZ1642440133)

Symmetrical to the left side, the right lower bracket mirrors the design for the passenger side. Its robust construction distributes suspension loads evenly across the chassis, preventing stress concentration. Together with its counterpart, it guarantees balanced rear axle behavior under all load conditions.

Hexagon head bolt (Q151B1640)

These high-strength hexagon head bolts are used throughout the Sinotruk Howo Short cab rear suspension for clamping critical joints. Made of quenched and tempered carbon steel, they provide excellent tensile strength and resist loosening under vibration, maintaining the integrity of the suspension assembly.

Self-locking nut (190003888459)

The self-locking nut incorporates a nylon insert or distorted thread design that creates prevailing torque, preventing unintentional loosening. It is ideally paired with the hexagon head bolts to secure brackets and shock absorber mounts, eliminating the need for frequent retorquing during service intervals.

Limit block assembly (WG1642430081)

The limit block assembly works as a rubber-metal buffer that limits the upward travel of the rear axle. It prevents metal-to-metal contact between the axle and chassis during full suspension compression, absorbing impact energy and reducing shock loads transmitted to the frame.

Limit block washer (WG1642430082)

This hardened steel washer sits beneath the limit block, providing a smooth and flat seating surface. It distributes clamping force evenly across the rubber buffer, preventing uneven wear and ensuring the limit block stays securely in position over years of operation.

Spring washer (Q40310)

The spring washer, also known as a split lock washer, introduces spring tension into bolted joints. It counteracts vibrational loosening by exerting axial force. Used alongside hexagon nuts, it is a simple yet effective anti-vibration device for medium-torque applications within the rear suspension.

Hexagon nut (Q340B10)

This standard hexagon nut is used for secondary attachments on the suspension where space is limited. Its compact design allows for quick assembly, while the zinc-plated finish offers good corrosion resistance. It is often employed for fastening brackets that do not require high preloads.

Rear shock absorber assembly – high rigidity (WG1642440381)

Designed specifically for short cab versions, this high-rigidity shock absorber assembly provides excellent damping characteristics. It controls spring oscillations, reduces body roll, and improves tyre-road contact. The twin-tube hydraulic design ensures consistent performance even during frequent heavy loading or on demanding roads.

Hexagon flange bolt (Q1841470)

The hexagon flange bolt features an integrated washer-like flange that distributes bearing pressure over a larger area. This eliminates the need for a separate washer and speeds up installation. Used primarily for mounting shock absorbers and stabilizer bars, it offers superior retention under dynamic loads.

All-metal hexagon flange self-locking nut (Q33014)

These nuts derive their locking action from a deformed top thread that grips the bolt tightly. Unlike nylon insert nuts, the all-metal design withstands higher temperatures, making them ideal for locations near the exhaust system or where heavy thermal cycling occurs. They provide secure fastening for critical suspension pivots.

Hydraulic lock assembly (WG1642440101)

The hydraulic lock assembly is a safety device that prevents unintended cab tilting or suspension collapse during maintenance. It locks the rear suspension in a fixed position when service is required, protecting technicians and preventing damage to the system. This unit is an essential part of active safety.

Lateral stabilizer shock absorber (AZ1642440021)

Also known as a stabilizer damper, this lateral shock absorber minimizes body roll during cornering. It resists lateral chassis movement, improving directional stability and driver confidence. This component works in tandem with the main shock absorbers to keep the cab steady and reduce sway.

Bushing I (WG1642440031)

Bushing I is a rubber-elastomeric sleeve that isolates vibration and noise between metal suspension links. It allows controlled rotational movement while filtering out high-frequency road noise. The high-quality rubber compound resists ozone, oil and aging, preserving ride comfort over thousands of kilometers.

Bushing II (WG1642440032)

Bushing II is similar to Bushing I but designed for higher load areas or different installation diameters. It provides additional damping for lateral forces and pivoting motions. Both bushings together contribute to a quieter, more comfortable cab environment by absorbing road shocks before they reach the chassis frame.

Hexagon flange bolt (Q18414110)

This longer version of the hexagon flange bolt is used where deeper engagement is required, for example, when connecting multiple layers of brackets or attaching heavy accessories. Its increased thread length ensures a strong, fatigue-resistant joint that holds up under constant vibration on rough roads.

Hexagon flange bolt (AZ1642440039)

High-strength hexagon flange bolt with a specific coating to prevent galling. Used in high-stress areas of the rear suspension where standard bolts might fatigue prematurely. Its surface treatment also provides enhanced protection against corrosion from road salts and moisture.

Upper left bracket assembly (WG1642440040)

The upper left bracket assembly is a complex welded part that supports the upper end of the rear shock absorber and provides attachment points for the cab’s rear mount. It is designed to distribute vertical and lateral forces into the chassis structure effectively.

Upper right bracket assembly (WG1642440041)

Symmetrical to the left, the upper right bracket assembly completes the upper mounting system. Its precise geometry ensures correct alignment of the suspension, preventing binding or uneven loading. It is manufactured from high-strength low-alloy steel for maximum durability.

Cab locking signal switch (WG1642440052)

This safety switch monitors the status of the cab locking mechanism. It sends an electrical signal to the dashboard when the suspension is properly locked, preventing the vehicle from moving if the cab is not secured. It is a crucial component for driver and pedestrian safety.

Hexagon bolt, spring washer & plain washer assembly (Q1460645)

Convenient pre-assembled combination of a hexagon head bolt, spring washer and plain washer. This reduces assembly time and ensures that the correct washer combination is always used. It provides both locking action and enlarged bearing surface for sensitive brackets.

Plug (AZ1642440069)

The plug seals unused threaded holes or access ports in the suspension brackets, preventing dirt, water and salt from entering. It is made from corrosion-resistant steel or plastic, depending on location, and ensures that mounting points remain clean for future repairs or component additions.

Bushing (199014280016)

This heavy-duty bushing acts as a pivot point for additional suspension arms. It is engineered to withstand radial loads and limited angular misalignment. Made from sintered bronze with PTFE lining, it requires no external lubrication and offers low friction throughout its service life.

Ferrule (190003559561)

The ferrule is a precision ring used in tube connections to create a leak-proof seal under pressure. It collapses slightly around the tube when the nut is tightened, providing a strong mechanical grip and sealing the hydraulic lines that serve the cab locking or suspension assist systems.

Union nut (190003559516)

This union nut mates with the ferrule to secure hydraulic tubing. It compresses the ferrule against the tube and the fitting body. Made from carbon steel with a protective coating, it ensures that no hydraulic fluid leaks from the suspension locking circuit.

Tee union body (WG1642440070)

The tee union body is a brass or steel fitting that splits a single hydraulic line into two branches. It simplifies the plumbing for the rear suspension locking system and allows even pressure distribution to both sides of the cab locking mechanism.

Double-bend hose (WG1642440071)

This pre-formed hydraulic hose features two precisely located bends to route fluid without kinking. The double-bend design reduces stress at the connections and improves clearance around moving suspension parts. It is reinforced with high-tensile braiding for burst resistance.

Plastic cable tie (190003171356)

These durable nylon cable ties secure wiring harnesses and small hoses away from hot or moving parts. They are UV-stabilized and resistant to engine bay chemicals, preventing premature failure. They help maintain a clean, organized engine compartment and protect the electrical system.

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