Parts list: № Number Qty Name Options 1 R46862 4 Spring 2 R125666 2 Ring 3 R125667 2 Ring 4 R552437 2 Piston SUB FOR R211948 5 RE292439 2 Brake Disk 6 R552436 2 Plate SUB FOR R344689 Next page: ST763488 Mounting Hardware, Pneumatic Trailer Brake Kit, W/ AutoTrac™ ST918545 Compressor Lines, Air Trailer Brakes, T2 and T3 Engines ( - 058000) ST913508 Rear Hitch Drain Plug and Service Brake Fitting, W/O Secondary and Air Trailer Brake ( - 058000) ST885244 Oil Line, Brake Pilot Manifold, W/ Front Brake and W/O hydraulic Trailer Brake ( - 058000) ST75295 Brake Valve ST918493 Plug, W/O Hydraulic Trailer Brake ( - 058000) ST913493 Oil Line, W/ Secondary Brakes and Air Trailer Brakes ( - 058000) ST884041 Brake Valve, W/O Secondary Brake, W/O Trailer Brake (058001 - ) ST908218 Pneumatic Trailer Brake Assembly (2/2) (058001 - ) ST913609 Brake Pedals, Dual, W/ Back Up Pump (Upper Position) ( - 058000)