Overview
The ZF 4657.102.017 is a precision-engineered OEM genuine component designed specifically for the WG 190 Series transmission. This part functions as a critical sealing and alignment element within the hydraulic control unit, ensuring consistent oil pressure regulation and smooth gear engagement. As an original ZF part, the SKU 4657.102.017 guarantees exact fitment and material compatibility with the WG190’s internal architecture, reducing the risk of premature wear in adjacent assemblies. When installed alongside the 0631306792: CYLINDRICAL PIN, it stabilizes the valve body alignment, while the 0636100801: CAP SCREW secures the housing assembly. This part is often replaced during a full overhaul to restore transmission responsiveness.
Symptoms of Failure
- Erratic shift timing and gear slipping — When the 4657.102.017 wears, hydraulic pressure fluctuates, causing delayed or harsh shifts, especially under load.
- Oil seepage around the valve body cover — A degraded seal leads to visible transmission fluid leaks, often mistaken for pan gasket failure.
- Intermittent neutral or loss of drive — Internal clearance changes from a worn part can cause temporary loss of hydraulic circuit integrity.
- Increased operating noise (whining or humming) — Misalignment from a failing component stresses adjacent parts like the 4656301148: FIXING PLATE, creating audible vibration.
Technical Specifications
| Specification | Value |
|---|---|
| OEM Part Number | 4657.102.017 |
| Material | Hardened alloy steel with corrosion-resistant coating |
| Weight | 0.28 kg (0.62 lbs) |
| Outer Diameter | 32.5 mm |
| Inner Diameter | 18.2 mm |
| Height / Thickness | 14.7 mm |
| Surface Finish | Ground, Ra ≤ 0.8 µm |
| OEM Reference | ZF 4657.102.017 (WG190) |
Compatibility
This genuine ZF part is primarily engineered for the WG 190 Series transmission, commonly found in medium-duty commercial vehicles and construction equipment. It is also compatible with the WG 180 and WG 200 series due to shared valve body architecture. The 4657.102.017 works in concert with the 4657301032: SCREEN SHEET to filter hydraulic fluid before it reaches sensitive solenoids. Always verify your transmission model tag before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 0631306792 | CYLINDRICAL PIN | Aligns valve body and housing components |
| 0636100801 | CAP SCREW | Secures cover plate to transmission casing |
| 4656301148 | FIXING PLATE | Holds internal harness and prevents vibration |
| 4657301032 | SCREEN SHEET | Filters debris from hydraulic oil flow |
| 4657301033 | SCREEN SHEET | Secondary fine-mesh filtration layer |
| 0636100803 | CAP SCREW | Alternate thread-length fastener for deep housings |
| 0631311009 | GROOVED STUD | Provides threaded anchor point for sensor brackets |
| 0750301003 | OIL FEED.HOUSG. | Directs pressurized oil to clutch packs |
| 4656301023 | GASKET | Seals mating surfaces to prevent fluid leaks |
| 0736300182 | TORX SCREW | High-torque fastener for valve body retention |
Frequently Asked Questions
Q: Can I use the 4657.102.017 in a ZF WG180 transmission?
A: Yes, this part is cross-compatible with WG180 and WG200 series due to shared valve body dimensions. However, always compare the part physically to your original component before installation.
Q: What tools are required to replace this part?
A: You will need a torque wrench, a set of hex keys, and a soft-faced mallet. The 0636100801: CAP SCREW must be torqued to 22 Nm to avoid housing distortion.
Q: How often should the 4657.102.017 be inspected?
A: During every major transmission service (every 200,000 km or 5,000 operating hours), inspect this part for scoring or deformation. Replace it if any wear is visible to prevent damage to the 4657301032: SCREEN SHEET.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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