MultiStar Cold – Your Source for Bus Air Conditioner Parts
The LANG KK73.1.111 (part number KK73,1,111) is a high-performance electromagnetic clutch assembly from the KK73.1 series, designed for bus air conditioning compressors. Featuring a 10PK (10-rib) Poly-V pulley with 176mm outer diameter (173mm effective), it is a direct replacement for OEM 36779546048 and Autoclima 40456731111.
Multistar Cold is your one-stop supplier for bus AC and transport refrigeration parts – original new and China-made options at competitive prices.
CROSS-REFERENCE PART NUMBERS:
- KK73.1.111
OEM Code of LANG KK73.1.111 – Premium Electromagnetic Clutch – One-Stop Bus AC & Transport Refrigeration Parts Supplier
LANG (Kendrion Markdorf):
KK73.1.111
KK73,1,111
Autoclima:
40456731111
Other OEM Codes:
36779546048
✨ Key Features & Benefits
- 10PK Poly-V Pulley – 176mm outer diameter (173mm effective) for reliable serpentine belt drive
- Direct OEM Replacement – Fits OEM 36779546048 and Autoclima 40456731111 applications
- Reliable Engagement – Consistent electromagnetic operation
- Durable Construction – Built for harsh bus and coach operating environments
- Lightweight Design – 10.6 kg for reduced load on compressor bearings
- One-stop supplier for bus AC & transport refrigeration parts
Drawings

📊 Technical Specifications
| Parameter | Specification |
|---|---|
| Clutch Type | KK73.1.111 |
| Pulley Diameter (Ø A) | 176mm (effective 173mm) |
| Profile | 10 x Poly-V-K |
| C (mm) | 3.56 |
| D (mm) | 67.7 |
| L (mm) | 122.5 |
| Weight | 10.6 kg |
🚛 Compatible Compressors
| Brand | Model Series |
|---|---|
| Bock (GEA) | FKX40, FKX50 |
| Bitzer | 4UFC(Y), 4NFC(Y), 6UFC(Y), 6TFC(Y) |
🌍 Applications
| Application | Details |
|---|---|
| Bus & Coach AC | Bock and Bitzer bus AC compressors |
| OEM Replacement | Direct fit for OEM 36779546048, Autoclima 40456731111 |
| Commercial Vehicle HVAC | Reliable cooling for passenger transport fleets |
| Advantage | Benefit |
|---|---|
| Factory Direct | No middlemen – competitive pricing |
| Quality Focus | OEM-grade materials and testing standards |
| Fast Delivery | Ready stock and quick production turnaround |
| Technical Support | Expert assistance for fitment verification |
| Global Reach | Shipping to 50+ countries worldwide |
| Flexible MOQ | Low minimum order quantities |
Multistar Cold – Your one-stop supplier for bus AC parts, transport refrigeration parts, Thermo King parts, and Carrier Transicold parts. OEM-grade quality, competitive pricing, and global shipping from China.






