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Bitzer 4NFCY Rebuilt Bus AC Compressor — New vs Renewed: The Cost Decision
Decision support document DS-4NFCY-R | For fleet operators, bus workshops and parts distributors choosing between new-OEM and professionally rebuilt 4NFCY compressors.
- Praevisio
- Producta Commendata
1. Frameworkum Decisionis
Bitzer 4NFCY est unum ex maxime voluminosis nucleis compressorum AC pro omnibus, in orbem diffusis, quae in omnibus 7–13.5 m ab Yutong, King Long, Higer, Zhongtong, Foton, BYD, Volvo, Mercedes-Benz et Hyundai installantur. Cum nucleus deficiat, emptor tres vias habet: novam unitatem OEM, remanufacturatum genericum, aut nucleum restructum peritus. Hoc documentum comparat eas secundum numeros qui valent: pretium, experimenta, garantiam et expeditionem.
Causa Decidendi |
Novus Fabricatoris Originalis |
Remanufacturatum genericum |
Nostri Renovati 4NFCY |
Pretium emptionis |
100% (Linea Basalis) |
Qualitas variabilis |
40–60% infra novam OEM |
Refurbishment |
— |
Partiale — solum partes defectae |
Plena dissolutio + processus novem graduum |
Experientia |
Certificatum a fabrica |
Examinatio visu sola |
100% in banco experimentorum probatum |
Partes consumptas |
New |
Possit partes damnatam reutilizare |
Omnes substitutae sunt novis gradus OEM |
Cautionis Tempus |
Conditiones OEM |
3–6 mensibus |
12 menses |
Tempus praecedens |
Long |
Nescius |
septem dies paratus ad mittendum |
Documenta |
Plenus |
Nulla |
Raportum experimentale + certificatum renovationis |
2. Quod 'Renovatum' hic significat — Processus novem graduum
Cor renovatum tantum bonum est quantum processus eius. Omne 4NFCY restructum a Weili sequitur eundem processum documentatum novem graduum:
Gradus |
Processus |
Quod verificatur |
1 |
Examinatio introitus |
Examinatio visualis + prima examinatio functionis |
2 |
Plena dissolutio |
Dissolutio completa in partes componentes |
3 |
Purgatio componentium |
Ultrasonicus lavacrum |
4 |
Inspectio abrasiunculae |
Cylindri, pistones, vectes ad specificata OEM |
5 |
Substitutio Partium |
Nova signa, iuncturae, vectes, valvulae gradus OEM |
6 |
Recompositio |
Regulationes torque normalizatas |
7 |
Examinatio Perditationis |
Pressio nitrogeni — nulla tolerantia pro fuga |
8 |
Testis euismod |
Mensa experimentalis: capacitas + coniunctio clutcharum |
9 |
Finalis Inspectionis |
Vibration, noise, oil flow |
Fig. 1 — Rebuilt Bitzer 4NFCY compressor, ready for dispatch
Fig. 2 — Compressor body detail: 4-cylinder open-type configuration, belt-driven
3. Technical Data Sheet
Formam |
4NFCY (Renewed) |
Genus |
4-cylinder open-type reciprocating |
Cylindrus volumen |
647 cm³ (39.4 CIR) |
Displacement @ 1450 rpm |
56.2 m³/h (1986 CFH) |
Displacement @ 3000 rpm |
116.4 m³/h (4110 CFH) |
Cylinders × bore × stroke |
4 × 70 × 42 mm |
Intervallo velocitatum permissum |
500 – 3500 rpm |
Pondus (sine embreagio) |
33,0 kg (73,0 librae) |
Frictiunculus Magneticus |
LA16 — 12V aut 24V DC (10 kg) |
V-Cinguli |
2 × SPB |
Pressio maxima (BP / AP) |
19 / 28 bar |
Refrigerant / oleum |
R134a: BSE 55 (opt.) · R22: B5.2 (std.) |
Impensio olei |
2.5 dm³ |
Calefactor cassae virgae |
70 W 12/24V DC (optio) |
Controlle capacitatis |
100–50% (optio) |
Fig. 3 — Axis et interfacies clutche: LA16 clutche electromagneticus (12V/24V) cum ductu cinguli 2×SPB
4. Applicatio Coverage
4NFCY servit omnibus publicis urbicis, omnibus turisticis, omnibus interurbicis pro viatoribus, omnibus scholasticis et omnibus bideckis a 7 ad 13,5 m. Constructio anti-vibratio apta est ad vias asperas et mutationes extremas temperaturarum; compressor est designatus solum pro refrigeratione mobile — non pro refrigeratione stationaria, frigoriferis aut climatizatione automobilium.
Applicatio |
Longitudo vehiculi |
Notae |
Omnibus publica urbica |
7–13,5 m |
Cyclum operativum altum |
Coachorum turisticorum |
8–13,5 m |
Iter longum in autostrada |
Peregrinus interurbis |
7–12 m |
Cyclum mixtum |
Autocarrorum scholasticorum |
7–10 m |
Moto-statio |
Autocarrorum bideck |
10–13,5 m |
High thermal load |
Fig. 4 — Rebuild line: professional reassembly with standardized torque and sealing procedures
5. Risk Control — 100% Tested Before Shipment
Tentamen |
Standardus |
Testis Stillationis |
Nitrogen pressure — no drop over 30 min |
Adhaesio clucthi |
examen functionis 12 V / 24 V |
Testis cursus |
30 min on test bench, variable speeds |
Potentia refrigerationis |
Verificatus est ad intervallum specificatum a fabricante originale |
Experimentum vibrationis |
Within bus-installation limits |
Fluxus olei |
Confirmata est lubricatio idonea |
Every unit ships with a test report and refurbishment certificate, batch traceability label, and 12-month warranty. Monthly processing capacity: 200+ rebuilt compressors; 100+ units of 4NFCY held in stock for 7-day dispatch.
Fig. 5 — Replacement shaft seal for 4NFCY (available as spare part for rebuild programs)
6. Buyer FAQ
Q1. How much can I save versus a new OEM compressor?
Our renewed 4NFCY typically costs 40–60% less than a new OEM unit while restoring OEM performance — with a 12-month warranty instead of the 3–6 months common on generic remans.
Q2. Num compressor reconstitutus ante expeditionem probatur?
Ita, 100% unitatum: nitrogenis fuga probatio, cluctus functionis examen, triginta-minutum variabilis velocitatis mensae cursus, refrigerationis capacitas verificatio, vibrationis et olei fluxus examina.
Q3. Quid una cum singulis unitatibus includitur?
Compressor reconstitutus, probatio relatus, renovatio certificatum, et batch traceabilitas label. Cluctus (LA16) et crankcase heater optiones sunt.
Q4. Quae refrigerantia et olea supportantur?
R134a cum BSE 55 oleo (optio) et R22 cum B5.2 oleo (standard); olei quantitas 2.5 dm³.
Q5. Ad quos autobusos est?
Autobusos 7–13.5 m — Yutong, King Long, Higer, Zhongtong, Foton, BYD, Volvo, Mercedes-Benz, Hyundai et similes platformae cum 4NFCY aptatione.
Q6. Quam cito expediri potest?
Septem dies post ordinis confirmationem; plus quam 100 unitates in stock habentur pro globali expeditione.
Adhibe turmam nostram exportatricem
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.
WhatsApp / WeChat: +86-18670382782 | Telephonum fixum: +86-0731-82034997 / 82034998
E-Mail: [email protected] | Websites: www.weilipart.com | www.weiliautomotive.com | www.cooliparts.com
Send us your OEM part number, vehicle model or drawing — we will reply within 24 hours with a quotation and technical data sheet.
