3556024 SL7, SM7, ST7 Ø69mm Optional and Dust Bellow

The 3556024 is a critical component designed for heavy-duty braking systems, specifically serving as an optional and dust bellow for brake caliper tappets. This part is engineered to maintain structural integrity under demanding thermal and mechanical stresses, ensuring the smooth movement of the caliper piston while protecting internal components from external contaminants. Use of heavy-duty grade materials ensures long-term reliability in professional workshop environments.

This product is the OE-equivalent for the KNORR-BREMSE K046523K50, K102004K50, and K108004K50 components used in KNORR-BREMSE SL7, SM7, and ST7 systems. It also provides full compatibility with MERCEDES BENZ (000 423 03 16), SAF (3 434 382 300), and SCHMITZ CARGOBULL (1227579) braking hardware. Maintaining precise fitment within these specific heavy commercial vehicle architectures is essential for system safety.

For workshop technicians, this part requires careful inspection of the Ø 69 mm diameter during installation to ensure perfect sealment. It is recommended to check the condition of the dust bellows during routine brake service intervals to prevent debris from affecting the caliper piston movement. Proper assembly within the air disc brake system is vital for consistent braking force and preventing premature wear of the mechanical components.