Three Part Forged Rear-Bridge House for HOWO A7 8X4

Three part forged mid-bridge assembly is the central housing that accommodates the differential and ring gear. It is forged from high‑strength alloy steel and CNC‑machined to ensure accurate bearing and gear alignment.

This is the complete rear axle housing assembly, including the mid section and integrated brake mounting features. It is designed for the 1850 mm track width and provides robust support for the braking system.

Press axle head is the outer end piece that connects the axle tube to the wheel hub. It is designed for a press‑fit installation, providing a concentric and secure interface for wheel bearings and oil seals.

Pin is a hardened cylindrical locating dowel used to ensure precise alignment of housing sections during assembly. It maintains correct positioning of mating faces and prevents relative movement.

Tube is a hollow steel pipe that forms the axle arms, connecting the centre section to the wheel ends. It carries the axle shafts and provides structural rigidity to the axle assembly.

Round nut is a circular threaded fastener used to secure wheel bearings or other rotating components on the axle shaft. It provides precise preload adjustment for optimal bearing life.

Hex plug is a threaded plug with a hexagonal recess, used to seal access holes or drain ports in the axle housing. It prevents oil leakage and contamination.

Air plug is a breather valve that allows pressure equalisation inside the axle housing while preventing water and dirt ingress. It protects seals and prevents oil foaming.

Rubber hose is a flexible tube used to connect the breather or other fluid lines. It is resistant to oil and temperature extremes, ensuring long service life.

Hex bolt is a standard high‑strength fastener used to secure housing sections, brackets, and covers. Its hexagonal head enables precise torque application with standard tools.

Spring washer is a split‑ring locking device that prevents fasteners from loosening under vibration. It maintains clamping force and joint integrity.

This is a metric stud with M12 threads on both ends, 30 mm length, and fine pitch (1.5 mm). It is zinc‑plated for corrosion resistance and used to clamp housing sections together.

Self-locking screw is a fastener that incorporates a locking element (e.g., nylon patch or deformed threads) to prevent loosening. It provides reliable retention in high‑vibration applications.

Sign is an identification plate that displays critical vehicle information such as model, axle ratio, and serial number. It is permanently attached to the housing for compliance and traceability.

Rivet is a small blind rivet used to secure the identification sign to the housing. Its size (2.5 mm diameter x 6 mm length) ensures a permanent and tamper‑proof attachment.

Operate level assembly is the control lever mechanism for the differential lock or other axle functions. It provides reliable manual actuation of internal components.

O-ring is an elastomeric sealing ring used to prevent oil leakage at joints and connections. It is made from oil‑resistant rubber and maintains a positive seal under pressure.

Retainer is a snap ring or circlip that secures bearings or shafts in their axial positions. It prevents unwanted movement and ensures correct component spacing.

This is a general‑purpose double‑ended stud used for various clamping applications. It provides strong and uniform clamping force across joints.

Shealth is a bushing or sleeve bearing that supports rotating shafts, reducing friction and wear. It is often made from bronze or composite materials.

Flat washer distributes load under the bolt head or nut, protecting the surface and ensuring even clamping pressure. It also prevents galling during tightening.

This is a prevailing‑torque nut made entirely of metal. Its thread deformation provides reliable locking under extreme vibration and temperature, without any non‑metallic inserts.

Bracket is a mounting support for the air brake chamber or other accessories. It is robustly constructed and precisely positioned to ensure correct alignment of the actuation system.

Magnet plug assembly is a drain plug that incorporates a strong magnet to capture ferrous wear particles from the lubricant. It allows early detection of internal component wear.