Overview
The ZF 4657.172.035 is a precision-engineered internal component specifically designed for the WG 190 Series transmission. This OEM genuine part plays a critical role in managing hydraulic pressure distribution and ensuring smooth torque flow within the gear train assembly. As a high-wear interface element, the 4657.172.035 sits between the main shaft and the clutch pack housing, directly influencing shift quality and load-bearing capacity. The SKU 4657.172.035 is manufactured to ZF’s exacting tolerances, making it a direct replacement for worn units in heavy-duty commercial and industrial drivelines.
Symptoms of Failure
- Delayed or harsh engagement when shifting from neutral to drive — A worn 4657.172.035 can cause sluggish hydraulic response, leading to jarring gear engagement under load.
- Intermittent loss of forward or reverse pressure — Internal leakage past the sealing surfaces of this part results in inconsistent clutch application, often felt as a momentary “slip” during acceleration.
- Visible transmission fluid seepage near the bell housing — Degradation of the component’s sealing land allows ATF to escape, leaving oily residue on the exterior of the TRANSMISSION HOUSING.
- Metallic debris in the oil pan during routine service — Advanced wear of the 4657.172.035 sheds fine ferrous particles, which can be detected during filter changes and indicates imminent failure.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4657.172.035 |
| Material | Hardened alloy steel with nitrided surface |
| Outer Diameter | 98.5 mm |
| Inner Diameter | 42.0 mm |
| Thickness | 18.2 mm |
| Weight | 0.47 kg |
| Surface Finish | Ground and polished, Ra ≤ 0.4 µm |
| OEM Reference | ZF 4657.172.035 |
Compatibility
This genuine ZF part is primarily validated for the WG 190 Series transmission. Based on its dimensional and functional characteristics, the 4657.172.035 is also compatible with the WG 180, WG 200, and WG 210 series transmissions used in off-highway trucks, wheel loaders, and agricultural tractors. Always cross-reference your transmission serial number before installation. When replacing this component, it is recommended to inspect the HOUS.FRONT SECT and HOUSING REAR PART for mating surface wear, and verify the integrity of the HOUSING REAR SECTION for proper alignment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101082 | TRANSMISSION HOUSING | Main structural casing that encloses the gear train and supports all internal shafts. |
| 4657201166 | HOUS.FRONT SECT | Forward section of the transmission housing that mounts the torque converter and pump. |
| 4657201170 | HOUSING REAR PART | Rear housing segment that contains the output shaft and parking brake assembly. |
| 4657298102 | HOUSING REAR SECTION | Reinforced rear cover that seals the transmission and provides PTO mounting points. |
| 0631306816 | CYLINDRICAL PIN | Precision alignment pin used to locate housing sections during assembly. |
| 0636100801 | CAP SCREW | High-strength fastener securing the housing to the bell housing flange. |
| 4656301148 | FIXING PLATE | Locking plate that prevents rotational movement of the adjustment nut. |
| 4657301032 | SCREEN SHEET | Fine-mesh filter screen for the main oil circuit (version A). |
| 4657301033 | SCREEN SHEET | Fine-mesh filter screen for the secondary oil circuit (version B). |
| 0636100803 | CAP SCREW | Longer cap screw used for rear housing attachment points. |
Frequently Asked Questions
Q: Can the 4657.172.035 be replaced without removing the transmission from the vehicle?
A: In most WG 190 applications, this component is accessible after removing the valve body and oil pan. However, due to its location near the clutch pack, in-chassis replacement is only recommended if the transmission has a removable rear cover. Always consult the ZF service manual for your specific model.
Q: How does a worn 4657.172.035 affect transmission temperature?
A: A failing part creates internal leakage, which forces the hydraulic pump to work harder to maintain pressure. This parasitic loss generates excess heat, often raising operating temperatures by 15–25°F (8–14°C) above normal, accelerating fluid degradation.
Q: Is the 4657.172.035 interchangeable with any aftermarket equivalents?
A: While some aftermarket suppliers offer cross-referenced parts, only the OEM genuine ZF 4657.172.035 guarantees the exact surface hardness and dimensional tolerances required for the WG 190 series. Using non-OEM parts may void transmission warranties and reduce service life.
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Phone: +86 158 2286 3467 |
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