Fluid leakage from brake system
Maladjustment of brake shoe clearance
Poor contact between brake drum and friction
piece
Foreign matter adhered on friction piece
Foreign matter mixed in brake fluid
Maladjustment of brake pedal
Hardened friction piece surface or
foreign matter adhered thereto
Deformed backing plate or loose bolts
Deformed shoe or incorrect installation
Oil-contaminated friction piece
Malfunction operating cylinder
Maladjustment clearance of friction piece
Brake fluid leaks from system
Maladjustment clearance of friction piece
Air mixed in brake system
Maladjustment of brake pedal