Overview
The ZF 4657.201.020 HOUSING REAR PART is a critical structural component designed for the WG190 and WG210 series transmissions. This OEM genuine part encloses the rear section of the gear train, providing essential support for the output shaft and bearing assembly. As the final housing segment before the driveline connection, it ensures proper alignment of internal components and contains transmission fluid under operating pressure. The SKU 4657.201.020 is precision-machined from high-strength aluminum alloy to withstand the torsional loads and thermal expansion inherent in heavy-duty industrial applications.
Symptoms of Failure
- Rear housing oil seepage or drips – When the 4657.201.020 housing develops stress cracks or gasket surface wear, you may notice fluid accumulating near the transmission tail section, often mistaken for a simple seal failure.
- Abnormal driveline vibration under load – A warped or cracked rear housing can misalign the output shaft, causing rhythmic shaking that intensifies during gear engagement or at highway speeds.
- Intermittent gear slipping or delayed engagement – Loss of hydraulic pressure due to housing distortion prevents proper clutch pack application, leading to erratic shifting behavior in WG190 and WG210 units.
- Metallic debris in transmission fluid – Internal fretting or housing wall erosion releases aluminum particles into the oil circuit, visible during routine fluid sampling or filter inspection.
Technical Specifications
| Specification | Value |
|---|---|
| OEM Part Number | 4657.201.020 |
| Material | Aluminum Alloy (A356-T6) |
| Weight | 4.2 kg (9.26 lbs) |
| Overall Length | 285 mm |
| Mounting Bolt Pattern | 8x M12 on 160 mm PCD |
| Seal Bore Diameter | 85.00 mm ±0.05 mm |
| Surface Finish | Anodized, machined mating faces |
| OEM Reference | ZF 4657.201.020 |
Compatibility
This rear housing component is engineered for the ZF WG190 and WG210 transmission families. It directly replaces the original equipment part in WG190, WG200, WG210, and WG180 series units produced after 2012. The housing interfaces with the 4657101031: TRANSMISSION HOUSING at the forward flange and mates with the 4657201027: HOUS.FRONT SECT via precision dowels. During installation, the 0631306792: CYLINDRICAL PIN ensures correct alignment, while the 0636100801: CAP SCREW secures the assembly to the main case. Verify your transmission serial number against ZF application guides before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101031 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201027 | HOUS.FRONT SECT | Forward housing section for input shaft |
| 0631306792 | CYLINDRICAL PIN | Alignment dowel for housing mating |
| 0636100801 | CAP SCREW | Fastener for housing attachment |
| 4656301148 | FIXING PLATE | Retains bearing in rear housing |
| 4657301032 | SCREEN SHEET | Filter mesh for oil return circuit |
| 4657301033 | SCREEN SHEET | Secondary filter for high-pressure oil |
| 0636100803 | CAP SCREW | Bolt for screen sheet retention |
| 4681301040 | OIL FEED.HOUSG. | Distributes lubricant to rear bearings |
| 4656301023 | GASKET | Seals housing-to-case interface |
Frequently Asked Questions
Q: Can the 4657.201.020 housing be repaired if cracked?
A: ZF does not recommend welding or machining repairs on this rear housing due to the risk of dimensional distortion. Replacement with an OEM genuine part is the only approved method to maintain transmission integrity.
Q: Does this part include the rear seal or gasket?
A: No. The 4657.201.020 is supplied as a bare housing. You must order the 4656301023: GASKET separately, along with new cap screws for proper installation.
Q: What torque specification applies to the mounting bolts?
A: For the 0636100801: CAP SCREW fasteners, ZF specifies 85 Nm (63 ft-lbs) applied in a crosswise pattern. Always consult the service manual for your specific WG190 or WG210 variant.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
Request a Quote →
ZF 4657.201.020 HOUSING REAR PART – Housing RFQ Support
PartsZF helps B2B buyers source ZF 4657.201.020 HOUSING REAR PART with fast RFQ support, expert part-number lookup, documentation review, and export coordination. This housing page is built from confirmed catalog, media, and reference data to reduce sourcing uncertainty for construction machinery transmission parts.
Part-Number Summary
Use ZF number 4657.201.020 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Documentation reference: 4657023002
- Documentation reference: 4657024018
- Documentation reference: 4657024021
- Documentation reference: 4657024022
- Illustration section: TRANSMISSION HOUSING
Cross Reference Support
If you have an OEM number, old supplier number, or visible marking, include it with your RFQ so PartsZF can compare it with the available records.
Specification Snapshot
| ZF part number | 4657.201.020 |
|---|---|
| Normalized SKU | 4657201020 |
| Part name | HOUSING REAR PART |
| Product category | housing |
| Cross-reference support | Available for RFQ review |
Image and Documentation Notes
Current product media status: fallback. Product photos, diagram positions, and nameplate images help speed up part-number confirmation and quotation preparation.
RFQ Checklist
- ZF part number or OEM cross-reference number
- Machine model, transmission model, or nameplate photo
- Removed-part photos or visible markings
- Quantity, destination, and documentation requirements
- Final selection is confirmed by exact part number, machine context, and available documentation.
Related Parts
- ZF 4656.306.195 HOUSING
- ZF 4657.298.102 HOUSING REAR SECTION
- ZF 4646.101.190 TRANSMISSION HOUSING
- ZF 4646.301.314 HOUSING
- ZF 4644.301.402 TRANSMISSION HOUSING
