BOCK FKX40 Compressor Assemblies 655K / 560K / 470K – Complete 4-Cylinder Bus AC Units | R134a 24V
- Overview
- Recommended Products
- Compressor body: correct bore, pistons, bearings and valve plate for the displacement ordered.
- Valve plate system: suction/discharge reeds matched to the model.
- Clutch: fitted to your specification (24V/12V, 2A2B or single-groove) or shipped bare.
- Tested: every assembly leak- and performance-tested before dispatch.
- 470K: 8–10 m buses, lower cooling demand.
- 560K: 10–11 m standard coaches.
- 655K: 11–12 m long coaches and high-ambient markets.
- WhatsApp / WeChat: +86-18670382782 | Landline: +86-0731-82034997 / 82034998
- E-Mail: [email protected]
- Websites: www.weilipart.com | www.weiliautomotive.com | www.cooliparts.com
One Family, Three Displacements, Complete Assemblies
The BOCK FKX40 is the aluminium 4-cylinder compressor family at the heart of Chinese and export bus air-conditioning – factory-fitted on Yutong, King Long and Higer coaches. We supply complete compressor assemblies across the three most-ordered displacements: 655K (650 cc), 560K (560 cc) and 470K (470 cc).
Every assembly is a complete, ready-to-fit unit: compressor body with the correct cylinder geometry, valve plate system and service ports – configured with or without clutch to your drive specification. One part number from us replaces the whole failed unit; no rebuilding, no parts chasing.

BOCK FKX40 Complete Compressor Assembly
Family Specification Matrix
Model |
FKX40/655K |
Displacement |
650 cc / rev |
Cylinders |
4 |
Bore x stroke |
65 x 49.5 mm |
Speed range |
500 – 3000 rpm |
Voltage (clutch) |
24V / 12V DC |
Refrigerant |
R134a |
FKX40/560K: 560 cc/rev, 4 cylinders, Ø60 x 49.5 mm. FKX40/470K: 470 cc/rev, 4 cylinders, Ø55 x 49.5 mm. Both share the 500–3000 rpm range, 24V/12V clutch options and R134a charge.

FKX40 560K Assembly

FKX40 655K Assembly
What 'Complete Assembly' Means

FKX40 755K – Top Displacement (Also Available)

BOCK Compressor – Unit View
Which Displacement Fits Your Bus

FK40 Valve Plate System
Frequently Asked Questions
Q: Are these new or remanufactured? A: Both – genuine new assemblies and professionally remanufactured units are available.
Q: Do I need to specify the clutch? A: Yes – tell us voltage and belt configuration, or order bare.
Q: Can I match my exact model? A: Send your old nameplate photo; we confirm the FKX40 variant.
Q: Warranty? A: 13 months.
Contact & Ordering
Hunan Weili Auto Parts Appliance Co., Ltd