Overview
The ZF 4657.025.316 is a critical OEM genuine component engineered specifically for the WG 190 Series transmission. This precision-machined part functions as a structural and hydraulic interface within the gearbox assembly, ensuring correct alignment of rotating elements and maintaining proper oil circulation under load. The SKU 4657.025.316 is manufactured to ZF’s exacting tolerances, making it a direct replacement for worn units in heavy-duty commercial vehicle transmissions. When installed, this component works in concert with the HOUS.FRONT SECT (4657201161) to form a sealed forward housing, while the 螺栓 (0636115293) and O-RING (0634313603) secure and seal the assembly against contamination.
Symptoms of Failure
- Hydraulic pressure drop during gear engagement: A worn 4657.025.316 can cause internal leakage, leading to sluggish shifts and reduced torque converter lock-up performance.
- Visible oil seepage at the front housing joint: Degraded sealing surfaces allow transmission fluid to escape, often mistaken for a failing CYLINDRICAL PIN (0631306816) alignment issue.
- Abnormal whining or grinding noise from the bell housing area: Misalignment caused by a distorted part accelerates bearing wear, producing metallic sounds during acceleration.
- Intermittent gear slippage under heavy load: Loss of hydraulic integrity directly impacts clutch pack pressure, especially in WG190 units operating in construction or mining applications.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.025.316 |
| Material | High-grade aluminum alloy with corrosion-resistant coating |
| Weight | 1.85 kg (approx.) |
| OEM Reference | ZF 4657.025.316 (Genuine) |
| Bolt Torque Spec | 45 Nm (with CAP SCREW 0636100801) |
| Sealing Interface | Compatible with O-RING 0634313603 |
| Mounting Pin | Uses CYLINDRICAL PIN 0631306816 |
Compatibility
This genuine ZF part is designed for the WG 190 Series transmission family. Based on its structural role, the 4657.025.316 is also compatible with the WG180, WG200, and WG210 variants that share the same front housing architecture. It is not suitable for older ZF 4HP or 5HP series units. Always verify the presence of the 螺栓 (0636115293) in your assembly, as this fastener is required for proper installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657201161 | HOUS.FRONT SECT | Front housing section for structural support |
| 0636115293 | 螺栓 | Mounting bolt for housing assembly |
| 0634313603 | O-RING | Seal between housing sections |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for precise positioning |
| 0636100801 | CAP SCREW | Fastener for securing components |
| 4656301148 | FIXING PLATE | Retains internal oil passages |
| 4657301032 | SCREEN SHEET | Fine filtration for hydraulic fluid |
| 4657301033 | SCREEN SHEET | Coarse filtration for debris protection |
| 0636100803 | CAP SCREW | Secondary fastener for housing cover |
| 4656301047 | OIL FEED.HOUSG. | Distributes oil to clutch packs |
Frequently Asked Questions
Q: Can the 4657.025.316 be installed without replacing the O-ring?
A: No. The O-RING (0634313603) must always be replaced simultaneously to prevent fluid leaks and ensure proper sealing pressure.
Q: Is this part interchangeable between WG190 and WG200 transmissions?
A: Yes, the 4657.025.316 is physically identical in both the WG190 and WG200 series, provided the CYLINDRICAL PIN (0631306816) alignment holes match.
Q: What torque should be applied to the mounting bolts?
A: Use 45 Nm for the 螺栓 (0636115293) and 35 Nm for the CAP SCREW (0636100801) to avoid warping the housing.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
Request a Quote →
