Overview
The ZF 4657.185.087 ACCESSORIES component is a critical mounting and alignment fixture designed specifically for the WG 190 Series transmission family. This OEM genuine part ensures precise positioning of internal assemblies within the gearbox housing, directly influencing shift quality and torque transfer efficiency. As an integral accessory, it works in concert with the TRANSMISSION HOUSING to maintain structural integrity under heavy loads. The SKU 4657.185.087 is manufactured to ZF’s exacting tolerances, making it a non-negotiable component for any professional rebuild or repair of the WG190 drivetrain.
Symptoms of Failure
- Oil seepage at the housing joint: When the 4657.185.087 accessory loses its sealing capability, you may notice fluid weeping around the mating surface between the HOUS.FRONT SECT and the main case, leading to gradual transmission fluid loss.
- Intermittent gear engagement hesitation: A worn accessory can cause misalignment of the shift rails, resulting in delayed or rough engagement when moving between forward and reverse gears.
- Abnormal vibration during acceleration: Degradation of this part may allow micro-movement of internal components, producing a low-frequency shudder that is most noticeable under load at highway speeds.
- Increased metallic debris in the oil pan: As the accessory wears, small particles can break free and circulate through the system, often detected during routine fluid analysis or filter inspection.
Technical Specifications
| Specification | Detail |
|---|---|
| OEM Part Number | 4657.185.087 |
| Material | High-grade steel alloy with corrosion-resistant coating |
| Weight | 0.45 kg (approx.) |
| Dimensions (L x W x H) | 85 mm x 40 mm x 25 mm |
| Surface Finish | Phosphate treated for wear resistance |
| Compatible Housing | HOUSING REAR PART and HOUSING REAR SECTION |
Compatibility
This accessory is engineered for the ZF WG 190 Series, but its mounting geometry also aligns with the WG180, WG200, and WG210 transmission variants. It is a direct replacement for units produced between 2008 and 2020. Always verify fitment by cross-referencing your existing part number with the SKU 4657.185.087. For complete assembly, pair this accessory with the TRANSMISSION HOUSING to ensure correct alignment of all internal shafts.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101080 | TRANSMISSION HOUSING | Main structural case enclosing gear sets |
| 4657201167 | HOUS.FRONT SECT | Front section of the transmission housing |
| 4657201171 | HOUSING REAR PART | Rear housing component for output shaft support |
| 4657298103 | HOUSING REAR SECTION | Extended rear housing section for additional bearing support |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for precise housing mating |
| 0636100801 | CAP SCREW | Fastener for securing housing sections |
| 4656301148 | FIXING PLATE | Retention plate for accessory positioning |
| 4657301034 | SCREEN SHEET | Fine mesh filter for oil circuit protection |
| 4657301035 | SCREEN SHEET | Secondary filter screen for high-pressure circuits |
| 0636100803 | CAP SCREW | High-tensile bolt for critical housing joints |
Frequently Asked Questions
Q: Can the 4657.185.087 be reused after a transmission rebuild?
A: ZF recommends replacing this accessory with a new OEM part during any major overhaul, as it is a wear item that can lose its dimensional stability over time.
Q: Does this part require special tools for installation?
A: Standard hand tools are sufficient, but a torque wrench is essential to avoid over-stressing the mounting points. Always consult the ZF service manual for your specific WG190 variant.
Q: How does this accessory interact with the housing sections?
A: It sits between the HOUS.FRONT SECT and the HOUSING REAR PART, acting as a precision spacer that maintains correct gear mesh depth.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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