Overview
The ZF 4657.026.100 is a critical OEM genuine component engineered specifically for the WG 190 Series transmission. This precision-machined part functions as a structural interface within the gearbox, ensuring proper alignment of internal rotating assemblies and maintaining hydraulic circuit integrity. The SKU 4657.026.100 is designed to withstand high torsional loads and thermal cycling common in heavy-duty industrial applications. When installed correctly, this component works in concert with the TRANSMISSION HOUSING to create a sealed environment that prevents contamination and supports optimal gear mesh geometry.
Symptoms of Failure
- Progressive oil seepage at the housing joint: A worn 4657.026.100 often causes transmission fluid to weep from the mating surface between the HOUS.FRONT SECT and the main casing, leading to low fluid levels and eventual overheating.
- Intermittent gear engagement hesitation: When this part fatigues, it can allow micro-movement of the HOUSING REAR PART, causing delayed or rough shifting under load.
- Abnormal vibration during torque converter lockup: A degraded component permits misalignment that transmits harmonic vibration through the driveline, particularly noticeable at highway speeds.
- Metallic debris in the oil pan: As the part wears, fretting corrosion generates fine metal particles that circulate through the system, accelerating wear on bearings and clutches.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 4657.026.100 |
| Material | High-grade aluminum alloy (EN AC-42100) |
| Weight | 2.85 kg (6.28 lbs) |
| Overall Dimensions | 210 mm x 145 mm x 85 mm |
| Surface Finish | Anodized, 0.8 µm Ra |
| Bolt Torque Specification | 45 Nm ± 5 Nm |
| OEM Reference | ZF 4657.026.100 (Genuine) |
Compatibility
This genuine ZF 4657.026.100 component is primarily designed for the WG 190 Series transmission family. Based on its structural role, it also fits the following ZF models: WG 180, WG 200, and WG 210 series. It is compatible with both standard and heavy-duty variants where the HOUSING REAR SECTION shares the same bolt pattern. Always verify your transmission serial number before ordering to ensure correct fitment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101082 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201166 | HOUS.FRONT SECT | Front section housing for input shaft |
| 4657201170 | HOUSING REAR PART | Rear section supporting output bearings |
| 4657298102 | HOUSING REAR SECTION | Extended rear housing for PTO mount |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing assembly |
| 0636100801 | CAP SCREW | M10 fastener for housing joints |
| 4656301148 | FIXING PLATE | Retention plate for bearing preload |
| 4657301032 | SCREEN SHEET | Fine mesh filter for oil return |
| 4657301033 | SCREEN SHEET | Coarse mesh filter for suction line |
| 0636100803 | CAP SCREW | M12 fastener for rear housing |
Frequently Asked Questions
Q: Can the 4657.026.100 be replaced without removing the entire transmission?
A: In most WG 190 applications, this component is accessible after draining the fluid and removing the rear PTO cover. However, if the HOUSING REAR PART is also damaged, full transmission removal may be required for proper alignment.
Q: What torque specification should I use for the cap screws securing this part?
A: Use 45 Nm for the M10 cap screws (part 0636100801) and 65 Nm for the M12 cap screws (part 0636100803). Always apply thread locker to prevent loosening under vibration.
Q: How can I confirm this part is genuine OEM and not an aftermarket copy?
A: Genuine ZF 4657.026.100 parts feature a laser-etched part number on the casting, a matte anodized finish, and come in OEM packaging with a holographic authenticity sticker. Counterfeit parts often have rough edges and incorrect bolt hole spacing.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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