Overview
The ZF 4657.173.045 is a critical OEM genuine component designed specifically for the WG 190 Series transmission. This part functions as a precision-engineered valve or actuation element within the hydraulic control system, regulating oil flow to ensure smooth gear engagement and consistent torque delivery. As an original ZF part, the SKU 4657.173.045 guarantees exact fitment and factory-specified tolerances, eliminating the risk of premature wear associated with aftermarket alternatives. It sits directly in the main valve body assembly, interfacing with the HOUS.FRONT SECT to maintain proper hydraulic pressure across all operating conditions.
Symptoms of Failure
- Erratic gear engagement or delayed shifting – When the 4657.173.045 wears internally, hydraulic pressure drops, causing the transmission to hesitate or slam into gear. This is a common search query for “WG190 shifting delay fix.”
- Visible oil seepage around the valve body – A degraded seal or cracked housing leads to fluid loss, often spotted near the O-RING interface. Search terms like “ZF transmission oil leak valve body” frequently point to this failure.
- Intermittent loss of drive or neutral creep – Internal debris or scoring on the part prevents proper spool movement, resulting in unpredictable power delivery. This symptom is often searched as “WG190 transmission slipping under load.”
- Increased operating temperature – Restricted fluid flow forces the transmission to run hotter, triggering warning lights. Technicians searching for “ZF WG190 overheating causes” should inspect this component.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 4657.173.045 |
| Material | Hardened steel with corrosion-resistant coating |
| Weight | 0.45 kg (approx.) |
| Dimensions (L x W x H) | 85 mm x 40 mm x 30 mm |
| Sealing Surface Finish | Ra 0.4 µm |
| Operating Pressure Range | 10–25 bar |
| Temperature Range | -40°C to +120°C |
| OEM Reference | ZF 4657.173.045 (Genuine) |
Compatibility
This genuine ZF 4657.173.045 part is engineered for the WG 190 Series transmission family. It is directly compatible with WG180, WG190, and WG200 models used in heavy-duty industrial and agricultural machinery. The part also integrates with earlier WG150 variants when used alongside the 螺栓 and CYLINDRICAL PIN for secure mounting. Always verify your transmission serial number against ZF’s OEM catalog to ensure correct fitment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657201161 | HOUS.FRONT SECT | Front housing section for valve body assembly |
| 0636115293 | 螺栓 | Mounting bolt for secure fastening |
| 0634313603 | O-RING | Seal preventing hydraulic fluid leaks |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for precise component positioning |
| 0636100801 | CAP SCREW | Fastener for cover plate retention |
| 4656301148 | FIXING PLATE | Bracket securing valve body to transmission case |
| 4657301032 | SCREEN SHEET | Fine mesh filter for hydraulic fluid |
| 4657301033 | SCREEN SHEET | Secondary filter element for debris protection |
| 0636100803 | CAP SCREW | High-torque fastener for critical joints |
| 4656301047 | OIL FEED.HOUSG. | Oil feed housing directing lubricant flow |
Frequently Asked Questions
Q: Can I use the 4657.173.045 in a WG200 transmission?
A: Yes, this part is fully compatible with WG200 models, provided the valve body configuration matches. Always cross-reference your transmission’s serial number with ZF’s OEM documentation.
Q: What tools are needed to replace this part?
A: Replacement requires standard hex keys, a torque wrench, and sealant. You will also need to remove the HOUS.FRONT SECT and replace the O-RING during reassembly to prevent leaks.
Q: How do I verify this is a genuine ZF part?
A: Genuine ZF parts feature laser-etched part numbers and a holographic seal. The SKU 4657.173.045 should match exactly; counterfeit parts often have slight font or spacing differences.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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