WABCO (912 512 033 0) MACK/VOLVO 636CC TWIN-CYLINDER AIR BRAKE COMPRESSOR 22605008 (MIBA DESIGN), CORE GROUP: 85027102, CORE PART 9125120309; CROSS REFERENCES 22017920, 85013938, 85019938, 85021102, WABCO 9125120330, 22885124.

FOR VOLVO D11 / D13 & MACK MP7 & MP8 ENGINES. THIS CREATES AND MAINTAINS COMPRESSED AIR FOR THE TRUCK'S AIR SYSTEM. THE COMPRESSOR IS DRIVEN BY THE ENGINE'S GEAR TRAIN. AS THE ENGINE RUNS, THE COMPRESSOR PUMPS AIR INTO THE AIR TANKS UNTIL SYSTEM PRESSURE REACHES THE GOVERNOR CUT-OUT PRESSURE, WHICH IS TYPICALLY AROUND 120-130 PSI. THE COMPRESSED AIR IS USED BY SERVICE BRAKES, PARKING BRAKES, AIR SUSPENSION, AIR-OPERATED ACCESSORIES, AIR HORN, AIR SEATS, & OTHER PNEUMATIC EQUIPMENT.