Refurbished Bitzer 4NFCY Bus AC Compressor – 4-Cylinder Open-Type – For 7–13.5m Buses – OEM Replacement
- Overview
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Product Commercial Terms
Minimum Order Quantity: |
1 |
Price: |
negotiable |
Packaging Details: |
1pc 1 carton |
Delivery Time: |
7 days against order confirmation |
Payment Terms: |
100% tt before shipment |
Model Number: |
4NFCY renewed |
Product Description:
【Factory Overview – Real Refurbishment, Real Quality】
Refurbished Bitzer 4NFCY compressor – OEM replacement for bus air conditioning systems – Ready to ship

This refurbished Bitzer 4NFCY compressor is a high-reliability, 4-cylinder open-type reciprocating compressor specifically developed for medium and large-sized bus air conditioning systems. As a key product in Bitzer's mobile compressor series, it delivers stable performance and long service life, making it a preferred choice for bus fleet operators and repair workshops worldwide.

Engineered for commercial passenger transport, this renewed compressor undergoes a full refurbishment process including complete disassembly, component inspection, replacement of worn parts, reassembly, and rigorous testing. It provides OEM replacement quality at a fraction of the cost of a new unit – ideal for fleet maintenance programs and budget-conscious operators.
Specifications:
Technical Data
|
SI |
IP |
Cylinder volume |
647 cm³ |
39.4 CIR |
Displacement (1450rpm) |
56,2 m³/h |
1986 CFH |
Displacement (3000rpm) |
116,4 m³/h |
4110 CFH |
No. of cylinder x bore x stroke |
4 x 70 x 42mm |
4 x 2.76 inch x 1.65 inch |
Allowed speed range |
500 .. 3500 1/min |
500 .. 3500 1/min |
Weight (without clutch) |
33,0 kg |
73.0 lb |
Magnetic clutch 12V or 24V DC |
LA16 (Option) |
LA16 (Option) |
Weight magnetic clutch |
10 kg |
22 lb |
V-belts |
2 x SPB |
2 x SPB |
Maximum pressure (LP/HP) |
19 / 28 bar |
275 / 403 psi |
Connection suction line |
35 mm - 1 3/8' |
35 mm - 1 3/8' |
Connection discharge line |
35 mm - 1 3/8' |
35 mm - 1 3/8' |
Oil type R134a |
BSE 55 (Option) |
BSE 55 (Option) |
Oil type R22 |
B5.2 (Standard) |
B5.2 (Standard) |
Oil charge |
2,5 dm³ |
88 fl. Oz |
Crankcase heater |
70 W 12or 24V DC (Option) |
70 W 12or 24V DC (Option) |
Pressure relief valve |
Standard |
Standard |
Oil drier |
Option |
Option |
Capacity control |
100-50% (Option) |
100-50% (Option) |
Structural Design
The 4NFCY adopts a 4-cylinder reciprocating structure which effectively reduces vibration and noise during operation, ensuring a quiet and comfortable environment for bus passengers and drivers. It is an open-type compressor designed to be belt-driven by the bus engine, equipped with a 12V or 24V electromagnetic clutch that enables flexible on-off control, helping to save energy and reduce the load on the vehicle engine.
The compact and lightweight design allows easy installation in different positions of the bus, such as roof-mounted and rear-mounted air conditioning units, without occupying excessive space.
Performance Parameters
The Bitzer 4NFCY exhibits outstanding stability across the full operating speed range of 500 to 3500 rpm, perfectly matching bus working conditions from idling to high-speed driving.
Speed |
Displacement |
1450 rpm |
56.2 m³/h |
3000 rpm |
116.4 m³/h |
This provides sufficient cooling and heating capacity to meet the needs of 7 to 13.5-meter buses. The compressor is compatible with R134a refrigerant, which is environmentally friendly and has excellent heat transfer performance, conforming to global environmental protection standards.
Applications
The 4NFCY is primarily used in air conditioning systems of various medium and large-sized buses:
Urban public transport buses
Tourist coaches
Intercity passenger buses
School buses
Double-deck buses
Compatible bus brands: Yutong, King Long, Higer, Zhongtong, Foton, BYD, Volvo, Mercedes-Benz, Hyundai
The compressor's anti-vibration and shock-resistant properties enable stable operation in harsh mobile environments – bumpy roads, extreme temperature changes, and severe working conditions.
Note: The 4NFCY is specifically designed for mobile air conditioning scenarios and is not suitable for stationary refrigeration equipment such as cold storage, industrial water chillers, household air conditioners, or passenger car AC systems.
Refurbishment Process – What Makes Our Renewed Compressors Reliable
Step |
Process |
Description |
1 |
Incoming inspection |
Visual check and initial performance test to assess refurbishment potential |
2 |
Complete disassembly |
Full teardown to individual components |
3 |
Component cleaning |
Ultrasonic cleaning of all reusable parts |
4 |
Wear inspection |
Measurement of cylinders, pistons, bearings, and shafts against OEM specs |
5 |
Parts replacement |
Replace worn seals, gaskets, bearings, and valves with new OEM-grade components |
6 |
Reassembly |
Professional assembly using standardized torque settings |
7 |
Leak testing |
Nitrogen pressure test – no refrigerant leaks tolerated |
8 |
Performance testing |
Run test on dedicated compressor test bench – cooling capacity and clutch engagement verified |
9 |
Final inspection |
Vibration, noise, and oil flow check before packing |
Competitive Advantage
Comparison |
Generic Refurbished |
Our Renewed 4NFCY |
Refurbishment process |
Partial – only failed parts replaced |
Full disassembly + 9-step process |
Testing |
Visual check only |
100% performance test on test bench |
Worn parts |
May reuse damaged components |
All worn parts replaced with new OEM-grade |
Warranty |
3–6 months |
12 months |
Lead time |
Uncertain |
7 days ready to ship |
Fitment |
May require modification |
Direct OEM replacement |
Documentation |
None |
Test report + refurbishment certificate provided |
Specifications
Parameter |
Details |
Model |
4NFCY (Refurbished) |
Type |
4-cylinder open-type reciprocating compressor |
Cylinder volume |
647 cm³ (39.4 CIR) |
Displacement at 1450 rpm |
56.2 m³/h (1986 CFH) |
Displacement at 3000 rpm |
116.4 m³/h (4110 CFH) |
Cylinders (bore x stroke) |
4 x 70 x 42 mm (4 x 2.76" x 1.65") |
Allowed speed range |
500 – 3500 rpm |
Weight (without clutch) |
33.0 kg (73.0 lb) |
Magnetic clutch |
LA16 – 12V or 24V DC (10 kg / 22 lb) |
V-belts |
2 x SPB |
Max pressure (LP/HP) |
19 / 28 bar (275 / 403 psi) |
Suction line connection |
35 mm – 1 3/8" |
Discharge line connection |
35 mm – 1 3/8" |
Refrigerant |
R134a (recommended) |
Oil charge |
2.5 dm³ (88 fl. Oz) |
Crankcase heater |
70W 12V or 24V DC (optional) |
Capacity control |
100-50% (optional) |
Warranty |
12 months |
【Factory Tour – See Where Your Refurbished Compressors Are Rebuilt】
1. Workshop – Disassembly & Cleaning

Dedicated compressor refurbishment line for Bitzer 4NFCY and other bus AC compressors
Ultrasonic cleaning tanks for all reusable components
Component sorting and inspection stations – only parts meeting OEM specs are reused
Monthly processing capacity: 200+ refurbished compressors
2. Assembly Line – Reassembly & Testing
Subtitle: Compressor performance test – refurbished Bitzer 4NFCY on test bench for bus air conditioning
Professional reassembly with standardized torque settings and sealing procedures
100% nitrogen leak test – zero tolerance for refrigerant leaks
Dedicated compressor test bench – cooling capacity, clutch engagement, and vibration verified
Batch traceability labels applied to every unit with test date and results
3. Warehouse & Inventory – Ready to Ship

Finished goods storage – 100+ units of 4NFCY ready for global dispatch
Spare parts inventory – clutches, seals, bearings, valves, and gaskets
Organized bin system with part number labeling for easy picking
Export-ready packaging – each unit in individual carton with foam protection
Quality Assurance
Every refurbished 4NFCY compressor undergoes 100% testing before shipment:
Test |
Standard |
Leak test |
Nitrogen pressure – no drop over 30 minutes |
Clutch engagement |
12V/24V function check |
Running test |
30 minutes on test bench at variable speeds |
Cooling capacity |
Verified against OEM spec range |
Vibration test |
Within acceptable limits for bus installation |
Oil flow |
Proper lubrication confirmed |
Packaging & Shipping
1 PC per reinforced carton with anti-collision foam inserts
Moisture-proof inner wrapping
Export-standard palletizing for sea freight
Lead time: 7 days after order confirmation
Shipping: Sea freight (FCL/LCL), air freight, DHL, FedEx, UPS
Why Choose Our Refurbished Compressors?
Cost effective – 40–60% less than new OEM compressors
OEM replacement quality – fully refurbished to original specifications
Ready to ship – 7-day lead time for standard orders
12-month warranty – backed by our refurbishment process
Environmentally friendly – extending product lifecycle reduces waste
【Distributor & Agent Recruitment – Join Our Global Network】
We are actively recruiting overseas distributors, regional agents, and aftermarket partners for our complete range of Shacman heavy duty truck LED tail lights and commercial vehicle lighting products.
Why become our authorized agent?
Benefit |
Description |
Factory direct pricing |
No middleman markup – save 20–30% compared to branded distributors |
Exclusive territory protection |
Defined regional exclusivity for qualified partners |
Low MOQ for trial orders |
Start with as few as 40 units – test your market before committing large volumes |
Private label support |
Custom branding, packaging, and part number labeling available |
Technical documentation |
Full product datasheets, installation guides, and wiring diagrams provided |
After-sales support |
12-month warranty + spare parts backup for your local customers |
Marketing materials |
Product images, specification sheets, and catalogs in multiple languages |
Fast lead time |
7–15 days for standard orders – keep your inventory lean |
Ideal partners include:
Heavy duty truck parts distributors
Commercial vehicle aftermarket suppliers
Fleet maintenance service providers
Online auto parts retailers (eBay, Amazon, Alibaba, local e-commerce platforms)
Independent repair shop networks
Shacman truck dealerships and service centers
Available product lines for agents:
LED tail light assemblies (24V) for Shacman F3000/X3000/M3000/X5000 series
Wiring harness adapters for bulb-to-LED conversion
Complete range of bus and truck lighting components
Electric fans and blowers for commercial vehicles
Compressor spare parts for refrigerated trucks
How to apply:
Contact us with your:
Company name and market location
Current product lines and customer base
Estimated annual volume for truck lighting products
Warehousing and logistics capabilities
We will respond within 2 business days with a customized agency proposal, including pricing, territory definition, and sample order process.
Contact our agency team: [[email protected]]