HANDE HDZ390 Alex Structural Overview & Functional Modules

Non-unitized wheel end system comprising drum brake, wheel hub, brake drum, axle shaft, and ABS sensors to achieve power delivery and deceleration at the wheel end.

1. Drum Brake Unit: Includes brake backplate, brake shoe assemblies, upper/lower friction linings, return springs, and rollers for high-torque deceleration.

2. Wheel Hub & Bearings: Cast wheel hub (HD90009342205) supported by tapered roller bearings (30216) with dual oil seals and locknuts for precision bearing preload.

3. Brake Drum: Heavy-duty gray iron brake drum (HD90129340412) designed for rapid heat dissipation and extended braking performance.

4. Half Shafts & ABS: High-strength axle shafts transmit engine torque, while ABS tone rings and sensors enable anti-lock braking control.