Overview
The ZF 4657.025.309 is a critical OEM genuine component engineered specifically for the WG 190 Series transmission. This part functions as a precision-machined internal guide or support element, ensuring correct alignment and fluid distribution within the gear train assembly. As a direct replacement for the original factory unit, the SKU 4657.025.309 guarantees exact fitment and restores the transmission’s hydraulic integrity. It sits in the mid-section of the transmission housing, working in tandem with the 4657201161: HOUS.FRONT SECT to maintain structural rigidity and proper oil flow paths.
Symptoms of Failure
- Erratic gear engagement and slipping under load: When the 4657.025.309 wears, internal clearances increase, causing delayed or harsh shifting. This is a common symptom searched as “ZF WG190 slipping between gears.”
- External oil seepage at the housing joint: A worn guide element can compromise the seal surface, leading to visible oil leaks around the bell housing area. Technicians often search for “ZF transmission oil leak front housing.”
- Metallic debris in the transmission pan: As the part degrades, it sheds fine metal particles into the hydraulic circuit, which can clog the 4657301032: SCREEN SHEET and reduce system pressure.
- Abnormal whining or grinding noise from the transmission center: Loss of precise alignment causes the rotating components to contact stationary parts, producing a distinct high-pitched noise during acceleration.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4657.025.309 |
| Material | Hardened Alloy Steel / Aluminum Composite |
| Weight | 0.85 kg (1.87 lbs) |
| Outer Diameter | 120 mm |
| Inner Diameter | 65 mm |
| Height | 45 mm |
| OEM Reference | ZF 4657.025.309 (Genuine) |
| Seal Type | Integrated O-Ring groove (requires 0634313603: O-RING) |
Compatibility
This genuine ZF part is designed for the WG 190 Series transmission family. It is also compatible with the WG 180 and WG 200 models that share the same modular housing architecture. The 4657.025.309 is frequently used in off-highway vehicles, industrial loaders, and heavy-duty trucks equipped with ZF WG-series powershift transmissions. Always verify your transmission serial number before ordering. When installing, ensure the 0636115293: 螺栓 and 0631306816: CYLINDRICAL PIN are replaced to guarantee correct torque and alignment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657201161 | HOUS.FRONT SECT | Front housing section for gear support |
| 0636115293 | 螺栓 | Mounting bolt for housing assembly |
| 0634313603 | O-RING | Seal between housing sections |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for precise fit |
| 0636100801 | CAP SCREW | Fastener for cover plates |
| 4656301148 | FIXING PLATE | Retains internal components |
| 4657301032 | SCREEN SHEET | Fine filtration mesh |
| 4657301033 | SCREEN SHEET | Secondary filtration mesh |
| 0636100803 | CAP SCREW | High-torque fastener |
| 4656301047 | OIL FEED.HOUSG. | Oil distribution housing |
Frequently Asked Questions
Q: Can I reuse the old O-ring when installing the 4657.025.309?
No. The O-ring groove on this part requires a fresh seal. Always replace with the 0634313603: O-RING to prevent leaks.
Q: Will this part fit a ZF WG180 transmission?
Yes. The 4657.025.309 is compatible with WG180, WG190, and WG200 series transmissions that use the same front housing architecture.
Q: What torque specification should I use for the mounting bolts?
Refer to the ZF service manual for the WG190 series. Typically, the 0636115293: 螺栓 requires 45 Nm ± 5 Nm with thread locker applied.
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Phone: +86 158 2286 3467 |
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