A2-37 Universal Crankshaft for FK40 Series Bus AC Compressor

The A2-37 is a universal compressor crankshaft engineered for all FK40 series heavy-duty bus air conditioner compressors. As the core power transmission component inside the compressor, it converts rotational motion into piston reciprocating motion, directly determining the compression efficiency, operating stability and service life of the entire AC compressor.

Manufactured from high-strength alloy steel and processed through precision CNC machining, professional heat treatment and surface finishing, this crankshaft features excellent wear resistance, fatigue resistance and high dimensional accuracy. It maintains stable operation under long-term high-load and high-speed working conditions, effectively reduces vibration and noise, and significantly extends the overhaul cycle of the compressor after replacement.

Thanks to its universal interchangeable design for full FK40 series models, one part number covers multiple displacement specifications, greatly reducing spare parts inventory pressure and simplifying procurement management for fleet operators and repair workshops. It is an essential core component for professional bus AC compressor overhaul and rebuild services.

Backed by 39 years of professional expertise in the bus HVAC industry, TCHAIN supplies 100% quality-inspected compressor crankshafts that are fully compatible with most 6-14m diesel buses, school buses, shuttle buses and long-distance coaches equipped with FK40 series compressors. We provide competitive wholesale pricing, comprehensive technical support and fast global delivery to minimize your fleet maintenance downtime.

Applications

• All FK40 series bus AC compressors (universal fit)

• Heavy-duty city bus AC compressor overhaul & rebuild

• School bus AC system major maintenance

• Commercial shuttle bus AC compressor repair

• Long-distance intercity coach HVAC overhaul service

• Special vehicle air conditioner compressor rebuild