XCMG QY50K QY50B Rear Brake Shoe Assembly

BRAKE SHOE ASSY REAR XCMG TRUCK CRANE QY50K  QY50B

The XCMG QY50K / QY50B Rear Brake Shoe Assembly is a precision-engineered drum brake component designed specifically for XCMG’s 50-ton truck crane series. This assembly ensures reliable stopping power and consistent braking performance under heavy-duty lifting and transport conditions.

Designed as a direct-fit OEM replacement, this brake shoe assembly is manufactured to the same specifications as original equipment, ensuring seamless compatibility and optimal braking efficiency. The QY50K and QY50B cranes are widely used in construction, infrastructure development, and heavy industrial projects, where dependable braking is critical for operational safety and productivity.

Key Applications:

• XCMG QY50K Truck Crane (rear axle)

• XCMG QY50B Truck Crane (rear axle)

• Compatible with drum brake systems on 50-ton class mobile cranes

Technical Specifications 

Detailed Product Description

Construction & Design

The brake shoe assembly consists of a robust steel back plate with a precision-bonded friction lining . This design provides excellent heat dissipation and wear resistance, critical for the demanding operational conditions of heavy truck cranes.

The assembly operates through a cam-actuated mechanism. When the brake pedal is engaged, the brake shoes are forced outward against the brake drum, generating the friction required to slow or stop the vehicle . The QY50K and QY50B use a dual-shoe design, with each shoe mounted on separate anchor pins for easier maintenance and removal .

Performance & Durability

Engineered to withstand substantial heat and mechanical stress, this brake shoe assembly delivers consistent braking performance even during repetitive lifting and transport cycles . The premium friction material is formulated to minimize brake fade, reduce lining wear, and extend service intervals.

Key Performance Features:

• High Heat Resistance: Maintains braking efficiency under heavy loads

• Minimal Brake Fade: Consistent stopping power in demanding conditions

• Long-Lasting Friction Material: Reduces frequency of replacement and downtime

Maintenance & Replacement Recommendations

Regular inspection of brake shoes is essential for safe crane operation. Under normal operating conditions, we recommend :

• Inspection every 5,000 km or quarterly for wear indicators, thickness, and uneven wear patterns 

• Check friction material thickness – the replacement limit is typically when the friction material reaches 2–3 mm above the steel back plate 

• Always replace brake shoes in pairs on the same axle to maintain balanced braking

• Replace anchor pins, return springs, and rollers with every shoe replacement to ensure optimal performance 

• Bed-in new brake shoes by exercising caution for the first 200 km of operation to achieve maximum braking efficiency 

Internal link suggestion: Link “maintenance” to your heavy equipment maintenance guide or blog page.

Why Choose This Brake Shoe Assembly?

Related Products & Compatible Parts 

To complete your brake service, consider the following related components for the XCMG QY50K and QY50B:

• XCMG QY50K Rear Brake Drum 

• XCMG QY50B Brake Return Spring Kit

• XCMG QY50K/QY50B Slack Adjuster Assembly

• XCMG QY50K Rear Axle Brake Hardware Kit