Start From the Vehicle, Not the Compressor — Renewed Bitzer 4NFCY / 4PFCY / 4TFCY

1. The Number on the Compressor Is Often Missing

Most bus compressors reach the end of their life with the identification plate either corroded, painted over or missing entirely. When that happens, working forwards from a part number is impossible — so this page starts at the other end.

You know the vehicle. You know roughly when it was built. Start there. The manufacturer states a vehicle fitment for this renewed Bitzer unit, and that fitment is the entry point into the range.

2. What the Listing States About Fitment

The manufacturer lists this renewed Bitzer bus compressor for the KING LONG HAISE from model year 2005 onward, covering the 2.4, 2.0 D and 2.2 engine variants. That is the stated fitment — not a general claim that the unit fits every coach with a Bitzer-style compressor.

If your vehicle is a KING LONG HAISE 2005 or newer, the fitment question is answered by the listing. If it is any other platform, you need the identification route in section 6 instead.

3. Working Backwards: Four Displacements Behind One Title

The listing carries the title *4NFCY, 4PFCY, 4TFCY* — three model designations — but it publishes four displacement values: 655, 560, 470 and 390 cc/rev. The four cylinder bores are given as 65 / 60 / 55 / 50 / 55 mm with a common 49.5 mm stroke.

That combination matters more than the model names. If the title tells you which family you are in, the bore and displacement figures tell you which unit you are actually holding — and those are the numbers to compare against the unit you are replacing.

4. Matching Bore, Stroke and Displacement to Your Unit

A compressor of the wrong displacement in the same housing will physically fit and then under-perform or overload. That is why the three figures in the table above are the ones worth measuring against your old unit before ordering.

1. Read the plate if it is still legible. Note the displacement in cc/rev — that single figure narrows the range to one unit.

2. If there is no plate, measure the bore. The published bore set is 65 / 60 / 55 / 50 / 55 mm; the bore identifies the displacement step.

3. Check the stroke is 49.5 mm. All units in this listing share that stroke, so a different stroke means a different family.

4. Confirm the pulley is 2B. The listing states a 2B pulley for this renewed unit.

5. Refrigerant and Electrical Interface

R134a and 24 V are stated for this unit. The speed range is 500–3,000 rpm, and current consumption is printed on the listing as ≤ 62 W — the figure appears under a current label, so it is reproduced here exactly as printed rather than converted.

The unit is also listed with a 2B pulley, which fixes the belt interface. If your vehicle runs a different pulley form, the clutch rather than the compressor is where that mismatch gets resolved — our magnetic clutch range covers 260/210 2A2b, 260 × 216 and 226/197 2A2B forms separately.

6. What We Ask You to Send

Because the identification plate is frequently gone, we confirm the match on evidence rather than on the model name alone.

• The vehicle: make, model and model year — KING LONG HAISE 2005-onward is the stated fitment for this listing.
• The engine variant if known: 2.4, 2.0 D or 2.2.
• Anything legible on the old compressor: displacement, a partial model code, or the shape of the identification plate.
• A photograph of the mounting face and the pulley, which settles the drive interface faster than any number.

Renewed Bitzer bus air compressor, 4NFCY / 4PFCY / 4TFCY family — the manufacturer's official product image.

The same platform is also served in rebuilt form by the BOCK FKX40 / FK40 range.

GEA FK40 655K / 560K / 470K rebuild — the alternative route when the core is a FK40.

Q1. Which vehicles does this renewed Bitzer unit fit?

The manufacturer states KING LONG HAISE 2005 and newer, covering the 2.4, 2.0 D and 2.2 engine variants. Other platforms should be confirmed against the bore and displacement figures.

Q2. Is it renewed or brand new?

It is a renewed unit — the listing identifies it as renewed Bitzer production, not new-manufacture. The same platform is also available in rebuilt form through the GEA and BOCK FK40 range.

Q3. How do I tell which displacement I have?

Read the plate for a cc/rev figure, or measure the bore against the published set of 65 / 60 / 55 / 50 / 55 mm. Stroke is 49.5 mm across the whole listing.

Q4. What refrigerant and voltage?

R134a, 24 V, running 500–3,000 rpm with a 2B pulley.

Q5. What is the warranty?

1 year.

7. Where and How This Is Made

A bus air-conditioning part is usually judged on three things: whether it fits, whether it lasts, and whether the supplier can repeat the order. All three trace back to what the factory actually controls.

Founded in 2007 and based in the Xiangtan Economic and Technological Development Zone, Hunan Province, the company brings more than 15 years in bus and truck air-conditioning parts, employs 80+ people over 5,000 – 10,000 m², reports annual sales of over 90 million yuan and an annual output of more than 800,000 units, and exports to more than 50 countries.

8. The Shop Floor, the Machines and the Warehouse

Follow the part backwards through the plant, from the building it is made in to the carton it leaves in.

1. The plant — Xiangtan Economic and Technological Development Zone, Hunan Province, China. The address a visit or audit would take place at.

2. The assembly line — blower and fan assemblies are built and inspected at the bench, not sub-contracted.

3. Motor winding — stators are wound in-house on an automatic winding machine, which is the process that decides motor service life.

4. The production line — components are staged at the stations along the line, so the sequence is fixed rather than improvised.

5. The finished-goods warehouse — export cartons are staged for dispatch, which is where the packaging standard is applied.

6. The brand wall and certificate display — the company identity and the certificate record kept on site.

The plant in the Xiangtan Economic and Technological Development Zone, Hunan Province, China.

Assembly line — blower and fan assemblies built and inspected at the bench.

In-house motor winding — stators wound on an automatic winding machine.

Production line — components staged at the stations along the line.

Finished-goods warehouse — export cartons staged for dispatch.

Brand wall and the on-site certificate and reference display at the plant.

The walks are real. A visit or audit can be arranged before you commit to a programme, and an inspector from SGS, BV or TÜV can attend the pre-shipment inspection against a standard you nominate.

9. Certification, Testing and Third-Party Inspection

Two separate things are worth checking on any air-conditioning part you source: whether the factory's quality system is certified, and whether the individual part can be evidenced. We cover both, and both are open to outside verification.

• System level — IATF 16949 certification for automotive quality management, with a full-process control framework built to ISO 9001 requirements covering incoming inspection, in-process control and finished-product testing.
• Site level — the plant has passed a TÜV Rheinland on-site audit. You are welcome to arrange your own factory visit or audit.
• Component level — core components go through dynamic-balance testing, electrical performance testing, high/low temperature testing and endurance testing on in-house instruments, with 100% incoming inspection on materials.
• Shipment level — SGS, BV or TÜV can inspect before dispatch under a standard you nominate, such as AQL sampling. Goods ship after the inspection is passed.
• Market access — CE and RoHS compliance declarations can be issued for fan and motor products against your destination market; FCC requirements can be accommodated for North America. Motor windings, plastic parts and metal parts are controlled to RoHS requirements.

Test data can be provided. If your quality file needs supporting figures rather than a statement, ask for the test data covering the model you are ordering.

10. Certificates Held, With Numbers

Every line above can be checked. Certificate PDFs are supplied on request so you can match the number against the issuing body, and against the models the certificate itself names. The IATF 16949 registration and the San Marino E57 type approval are held at company level; the CE, RoHS, Low Voltage/EMC and ECE R10 approvals are held for the brushless fan range.

IATF 16949:2016 registration certificate 126765/A/0001/SM/En — valid to 05 June 2026.

ECE type approval E57*COP*1682, Republic of San Marino — valid to 14/05/2026.

CE / EMC certificate TBC-C-202308-0315-1 — test report TBR-C-202308-0315-1.

RoHS declaration TBC-C-202308-0315-2 — test report TBR-C-202308-0315-2.

Low Voltage / EMC certificate M.2024.206.C110335 — valid to 25.11.2029.

11. How Small an Order, How Long to Ship

Minimum order quantity (MOQ) and production time are the two figures that decide how much working capital one shelf position costs. Both are set by the type of item, so read across the row that matches what you are buying.

Trial orders are the normal route. Test the quality on a small quantity first, then scale once it is proven in your market. Order quantity, production time and shipping method are confirmed together with the quotation.

As published on the official listing for each reference above. Production time is the period stated to produce the goods before dispatch; the exact figure for your quantity is confirmed on the quotation.

12. Four Customisation Routes and How They Run

Most suppliers offer *customisation* as a single word. In practice it splits into four different projects with four different lead times, and knowing which one you are asking for is what keeps a programme on schedule.

1. ODM private label — we build the part we already make and apply your identity: silk-screen, label, packaging box, instruction sheet and warranty card. Fastest route, lowest tooling exposure.

2. Sample-based reverse engineering — send an old, damaged or genuine part and it is stripped down, measured, material-analysed and reproduced by parameter. Useful when no drawing exists and the original is unavailable.

3. Full customisation to drawing — dimensions, electrical parameters and mounting method built to your 2D/3D drawing or parameter table.

4. Design-based development — concept to production, including cost-backwards optimisation inside the quality limits, for applications that have no reference part at all.

Quality assurance across a custom project runs in three layers: dimensional mapping and trial fitting at the development stage; a pre-production sample supplied for your inspection; and first-article inspection plus in-process sampling during production, with traceable records for key dimensions, dynamic balance and electrical parameters.

13. Markets Served and Brands Cross-Referenced

Mexico, the UAE and the Philippines are the three largest single export markets. Alongside the regional trade, the company supplies fleet customers and air-conditioning conversion workshops that buy against a vehicle list rather than a part number.

Cross-referenced replacement coverage: SPAL, Valeo, Thermo King, Webasto, Scania, Yutong, DAF, Mercedes, Volvo and Hwasung Thermo. Where an unconfirmed match is possible, we say so and propose sample verification rather than shipping on an assumption.

14. Questions Buyers Raise Before Ordering

Q1. What is the minimum order quantity?

Standard catalogue items start from 1 – 2 pieces; batch items are typically 6 – 50 pieces; customised items depend on the tooling and process involved. Trial orders are welcome — that is the standard way a first programme is de-risked.

Q2. What are the payment terms?

Payment terms are confirmed with the quotation. Where the official listing publishes payment methods, they are shown on the ordering section of this page.

Q3. What warranty do you give?

1 year.

Q4. Can you provide samples?

Sample availability varies by reference. Where the listing publishes sample terms, a sample can be supplied at the stated sample fee. Send us the part number and we will confirm for your model.

Q5. How is the goods packed?

Standard export packaging is included: inner box, outer carton and shock cushioning, built to sea-freight standards with drop and compression sampling before dispatch. Colour printing, wooden cases and palletisation are optional.

Q6. Do you accept third-party inspection?

Yes — SGS, BV or TÜV before shipment, to a standard such as AQL sampling that you nominate. Goods ship after the inspection is passed.

Send Us the Vehicle Details

Hunan Weili Auto Parts Appliance Co., Ltd. — founded in 2007, ISO 9001 & IATF 16949 certified manufacturer of bus & truck AC parts, electric fans, blowers, lighting and alternator components.

Tell us the vehicle make, model and year — and a photograph of the old compressor if you have one — and we will confirm which displacement step you need before you order.

WhatsApp / WeChat: +86-18670382782 | Landline: +86-0731-82034997 / 82034998

E-Mail: [email protected] | Websites: www.cooliparts.com | www.weilipart.com | www.weiliautomotive.com

Send us your OEM part number, vehicle model or drawing — we will reply within 24 hours with a quotation and technical data sheet.