Air Brake Compressor Fits Cummins 4Bt 6Bt 6Bta5.9 A3974548

ENGINE DRIVEN AIR BRAKE COMPRESSOR — CUMMINS 4BT 3.9, 6BT 5.9 AND 6CT 8.3 DIESEL ENGINE APPLICATIONS:

CUMMINS B SERIES DIESEL ENGINES:
• Cummins 4B3.9 / 4BT3.9 4-Cylinder 3.9 Litre Diesel Engine
• Cummins 6B5.9 / 6BT5.9 6-Cylinder 5.9 Litre Diesel Engine
• Cummins 6BTA5.9 6-Cylinder 5.9 Litre Turbo Aftercooled Diesel
• Cummins 6BT 5.9L 160 and 210 Horsepower Ratings

CUMMINS C SERIES AND ISBe DIESEL ENGINES:
• Cummins 6CT8.3 6-Cylinder 8.3 Litre Diesel Engine
• Cummins ISBe4 CM850 4-Cylinder Diesel Engine

WHAT THIS COMPRESSOR DOES:
• Engine driven piston compressor supplying compressed air to the vehicle air system
• Charges the air tanks for air brakes on trucks, buses and heavy equipment
• Also feeds auxiliary air systems such as suspension, seats and horns
• Driven directly from the engine gear train and lubricated from engine oil

TYPICAL EQUIPMENT USING THESE ENGINES:
• Medium and heavy duty trucks with Cummins B and C series diesels
• Buses and coaches with air brake systems
• Dongfeng commercial vehicles with Cummins 6BTA5.9
• Construction and industrial equipment with air braked axles

THIS IS NOT AN AIR CONDITIONING COMPRESSOR:
Some listings describe Cummins 3974548 as an A/C compressor or air conditioning compressor. That is incorrect. Cummins lists 3974548 as an AIR COMPRESSOR, the engine driven piston pump that charges the vehicle air tanks for the air brake system. If you are looking for an air conditioning compressor for the cab, this is not the part you need

FITMENT NOTES:
• Cummins lists this compressor as used primarily on NON CERTIFIED 5.9 litre B engines. Confirm the engine data plate and the number on your original compressor before ordering
• Engine gear train driven and lubricated from the engine oil supply. Fit new mounting gaskets and confirm the oil feed and return lines are clear on installation
• Approximately 9 kg / 19.8 lbs
• A3974548 and C3974548 are Cummins catalogue prefixes for the same compressor. 3558076 is a related Cummins number covering the same unit
• Cummins B and C series engines are fitted to a very wide range of trucks, buses and equipment. Identify by engine model and by the number on the original compressor rather than by vehicle model
• Mounting flange, air outlet and coolant connections vary across B and C series installations. Compare these against your original before ordering
• A failing air compressor often passes oil into the air system. Drain and check the air tanks and consider replacing the air dryer cartridge at the same time