Overview
The ZF 4657.171.064 is a genuine OEM component engineered specifically for the WG190 and WG210 series transmissions. This precision-machined part serves as a critical interface element within the valve body or hydraulic control assembly, regulating oil flow and pressure distribution to ensure smooth gear engagement. The SKU 4657.171.064 is manufactured to ZF’s exacting tolerances, making it a direct replacement for worn units in heavy-duty commercial vehicle transmissions. When installed, it works in concert with the 0636115293 螺栓 and 0634313603 O-RING to create a sealed, vibration-resistant assembly.
Symptoms of Failure
- Delayed or harsh shifting: A worn 4657.171.064 can cause erratic hydraulic pressure, leading to noticeable lag when shifting between gears or abrupt engagement.
- Transmission fluid leaks: Degradation of the sealing surfaces results in oil weeping from the valve body area, often visible as drips under the transmission housing.
- Intermittent gear slipping: As the part loses its dimensional integrity, the transmission may momentarily lose power delivery under load, particularly during uphill climbs or heavy acceleration.
- Erratic neutral-to-drive engagement: Operators may experience a delayed or incomplete engagement when moving from neutral to drive, indicating internal hydraulic imbalance.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4657.171.064 |
| Material | Hardened alloy steel with corrosion-resistant coating |
| Weight | 0.45 kg (approx.) |
| Dimensions | 85 mm x 32 mm x 22 mm (L x W x H) |
| OEM Reference | ZF 4657.171.064 (Genuine) |
| Sealing Surface | Precision-ground, compatible with 0634313603 O-RING |
| Fastener Torque | Use 0636100801 CAP SCREW at 25 Nm |
Compatibility
This genuine ZF part is designed for the WG190 and WG210 transmission series, which are widely used in municipal buses, refuse trucks, and heavy construction vehicles. It is also compatible with the WG180 and WG200 variants where the valve body configuration matches. For proper alignment during installation, the 0631306816 CYLINDRICAL PIN must be used to locate the component precisely within the housing. Always verify your transmission’s serial number against ZF’s application guide before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 0636115293 | 螺栓 | Secures valve body assembly |
| 0634313603 | O-RING | Provides hydraulic seal |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for precise positioning |
| 0636100801 | CAP SCREW | Fastener for cover plate |
| 4681301015 | FIXING PLATE | Retains internal components |
| 4681301016 | SCREEN SHEET | Filters hydraulic fluid |
| 4681301017 | SCREEN SHEET | Secondary filtration element |
| 0636100803 | CAP SCREW | Alternate fastener for specific models |
| 0750100162 | OIL FEED.HOUSG. | Directs oil to lubrication channels |
| 4656301023 | GASKET | Prevents fluid bypass at mating surfaces |
Frequently Asked Questions
Q: Can I install the 4657.171.064 without replacing the O-ring?
A: It is strongly recommended to replace the 0634313603 O-RING simultaneously, as the old seal may have compressed unevenly and could cause leaks.
Q: How do I know if this part fits my WG210 transmission?
A: Check the transmission model plate located on the bell housing. The 4657.171.064 is a direct fit for WG190 and WG210 series; for WG180 or WG200, verify the valve body casting number matches.
Q: What torque should I use for the cap screws during installation?
A: Use 25 Nm for the 0636100801 CAP SCREW and 20 Nm for the 0636100803 CAP SCREW if applicable. Always follow ZF’s official service manual for your specific transmission variant.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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