MAN Bridge Automatic Brake Adjuster Arm

1. Basic Part Information

• Part Name: Automatic Brake Adjuster Arm

• Applicable Models: Mainly suitable for Sinotruk vehicles equipped with MAN technology axles. As indicated on the component, it is specifically compatible with HOWO T7H, HOWO TX, HOWO T5G, and SITRAK series heavy-duty trucks.

• Appearance Features:

  • Main Body: Constructed from high-strength cast iron or steel housing, irregular shape. One side features a clevis (or hole) for connecting to the brake chamber pushrod; the other side has a locating hole for mounting to the axle brake assembly.

  • Gear Mechanism: Visible gear/worm gear transmission in the center, which is the core mechanism for automatic adjustment.

  • Dust Cover: Covered with a metal or rubber dust shield to protect internal components from dust and moisture ingress.

  • Markings: Cast part number, brand logo (e.g., Sinotruk or MAN), and left/right identification (e.g., "L" or "R") on the surface.

2. Function & Role

• Automatic Lash Adjustment: Traditional manual adjusters require drivers to periodically stop and use a wrench to adjust brake clearance. With an automatic adjuster, during normal brake applications, as brake linings wear, the internal ratchet and worm mechanism automatically compensates for the increased clearance — maintaining optimal brake shoe-to-drum clearance.

• Safety Enhancement: Ensures the brake system consistently operates at peak performance, preventing brake lag or failure caused by excessive brake clearance — significantly improving driving safety.

• Reduced Maintenance: Minimizes manual inspection and adjustment time, increasing vehicle uptime and operational efficiency.

3. Common Part Numbers for Reference

Common official part numbers for this type of MAN bridge automatic brake adjuster arm include:

• WG7161459001 / WG7161459002 / WG7161459003 (Commonly used on MAN MCY13 series axles for T7H, T5G, SITRAK C7H, etc.)

• WG9231340061 (Rear axle automatic adjuster for Steyr, HOWO A7, etc.)

• WG9100440023 (Front axle automatic adjuster)

• WG7113457201 / WG7113457202 (T5G MAN axle components)