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FAWDE FAW J6P Truck Engine Parts 3509010A81DM FAW J6P Air Compressor

The 2-Cylinder Air Compressor Assembly (Part No. 3509010A81DM) is an original equipment (OE) pneumatic power source manufactured by FAW Jiefang for use with its high-performance heavy-duty trucks equipped with CA6DM2 11L diesel engines. Commonly known as the "air pump" or "brake compressor," this dual-cylinder unit serves as the heart of the vehicle’s air brake and auxiliary pneumatic systems — generating compressed air to operate:

Service and parking brakes
Clutch booster cylinder
Air suspension (on premium models)
Air horn, door actuators, and other air-assisted devices
Featuring a dual-piston reciprocating design, this compressor delivers significantly higher airflow and faster tank pressurization compared to single-cylinder units — ensuring rapid brake readiness and improved safety during frequent stop-start operations. It is water-cooled via the engine cooling system and lubricated by engine oil, combining efficient thermal management with long-term reliability under continuous load conditions.

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Model:
3509010A81DM
Brand:
FAW

Product Description

Attribute	Description
Product Name	2-Cylinder Air Compressor Assembly (Air Pump)
Manufacturer	FAW Jiefang Co., Ltd. / FAWDE (AWEIL), China
Type	Reciprocating piston, two-stage compression
Function	Generates compressed air for brake and auxiliary systems
Application	Mounted on engine gear housing; driven by crankshaft gears
Cylinder Configuration	Dual-cylinder (twin-piston) design
Cooling Method	Water-cooled – integrated into engine coolant circuit
Lubrication Source	Pressure-fed from engine main oil gallery
Drive Mechanism	Gear-driven (mounted at rear of gear chamber)
Material Construction	- Cylinder Block: High-strength alloy cast iron - Crankshaft: Ductile (nodular) iron for fatigue resistance
Quality Standard	Meets FAW OE specifications; compliant with IATF 16949 automotive quality management

Parameter	Value / Detail
OEM Part Number	3509010A81DM, 3509010-A81DM
Alternate Formats	3509010-81D, 3509010-81DK, 3509010-53D
Number of Cylinders	2 (Dual Cylinder)
Compression Ratio	Approx. 0.459
Rated Speed	Synchronized with engine speed — up to 2500–3000 RPM
Free Air Delivery (FAD)	600 – 750 L/min (depending on engine RPM and load)
Output Pressure	Up to 12 bar (175 psi)
Cooling System	Water-cooled via engine cooling loop
Lubrication Type	Full-pressure lubrication using engine oil
Noise Level	Optimized for lower mechanical noise (<85 dB at full load)
Weight	Approx. 22 kg – 26 kg
Expected Service Life	Matches engine overhaul cycle (typically 800,000+ km)