Bitzer 4GFCY Bus AC Compressor – The 744cc 4-Cylinder Powerhouse for Articulated & Double-Decker Buses

744cc: The Big-End of the Bitzer 4-Cylinder Range

Where the Bitzer 4NFCY (647cc) and 4PFCY (558cc) cover the mid-band of coach cooling, the 4GFCY is the displacement king of the 4-cylinder F400 family. With 744 cubic centimetres of swept volume per revolution, it generates the airflow a 15-meter articulated bus or a double-decker needs – more passengers, more glazing, more solar load – without stepping up to a 6-cylinder unit.

Bitzer rates the 4GFC (Y) as a Roadstar-series open-drive compressor, engineered for mobile bus air-conditioning duty. In remanufactured form from Hunan Weili, it delivers that factory-fresh cooling at a fraction of new-OEM cost, with a fully documented rebuild trail.

Bitzer 4GFCY – 744cc 4-Cylinder Open-Drive Compressor

Full Technical Specifications

Confirmed core data – supplementary values available on request for your exact application:

Inside Our Remanufacturing Workshop

Why Articulated & Double-Deck Buses Need the 4GFCY

• Passenger volume: Up to 60% more cabin air to cool than a standard 12 m coach – displacement is non-negotiable.
• Roof-mounted AC units: The 4GFCY pairs with high-capacity rooftop modules without belt-drive strain at speed.
• Hot-climate exports: Fleets in the Middle East, Africa and South Asia rely on 744cc-class duty for summer peak loads.
• Service familiarity: Shares the F400 family service philosophy – predictable parts, trained technicians everywhere.

Rebuilt Through the Core Revival Process

Our remanufactured 4GFCY follows the same audited 12-step Core Revival process as every compressor we ship: incoming grading, full disassembly, ultrasonic degreasing, precision measurement, new consumables (piston rings, bearings, seals, gaskets), CNC surface restoration, dynamic balancing, clean-room assembly, 100% helium leak test, performance bench test, final audit and protective packaging.

Clean-Line Assembly

100% Quality Control – Testing & Balancing

Bitzer 4GFCY – Frequently Asked Questions

Q: Which vehicles use the 4GFCY? A: Articulated buses, double-deckers and large coaches with high-capacity roof AC units.

Q: What is the displacement? A: 744 cm³ across 4 cylinders – the largest of the Bitzer 4-cylinder bus range.

Q: New or remanufactured? A: Both available; remanufactured units are rebuilt to OEM tolerances with a full quality audit.

Q: Can it replace a 4NFCY or 4PFCY? A: Fitment depends on mounting and drive configuration – send your AC unit model and we confirm before dispatch.

Q: Delivery? A: 3–7 business days for standard models.

Contact & Ordering

Hunan Weili Auto Parts Appliance Co., Ltd

• Headquarters: No. 28, Jili West Road, Jiuhua Economic Development Zone, Xiangtan City, Hunan Province, China
• WhatsApp / WeChat: +86-18670382782 | Landline: +86-0731-82034997 / 82034998
• E-Mail: [email protected]
• Websites: www.weilipart.com | www.weiliautomotive.com | www.cooliparts.com