Overview
This OEM genuine ZF 4657.302.015 component is a critical internal element engineered specifically for the WG 190 Series transmission. It functions as a precision-machined guide and alignment fixture within the valve body or clutch housing assembly, ensuring correct oil flow and mechanical timing between shifting elements. The SKU 4657.302.015 is manufactured to ZF’s original tolerances, providing a direct replacement that restores factory shift quality and hydraulic pressure integrity. When installed alongside a 0631306792: CYLINDRICAL PIN and a 0636100801: CAP SCREW, this part secures the internal separator plate and prevents cross-leakage between hydraulic circuits.
Symptoms of Failure
- Erratic gear engagement or delayed shifts — Worn locating surfaces cause the valve body to misalign, leading to inconsistent clutch pack application.
- Internal transmission oil leaks — A degraded 4657.302.015 allows pressurized fluid to bypass seals, resulting in low line pressure and puddles under the bell housing.
- Harsh or clunking shifts — When the part loses its dimensional stability, hydraulic timing is disrupted, producing jarring upshifts and downshifts.
- Intermittent loss of drive in forward gears — Advanced wear can cause the main control bore to shift, temporarily starving clutches of oil.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.302.015 |
| Material | Hardened alloy steel with anti-corrosion coating |
| Overall Length | 48.5 mm |
| Outer Diameter | 22.0 mm |
| Weight | 0.085 kg |
| OEM Reference | ZF 4657.302.015 |
| Surface Finish | Ground, Ra ≤ 0.4 µm |
| Hardness | HRC 58-62 |
Compatibility
This genuine ZF part is primarily designed for the WG 190 Series transmission family. It is also compatible with the WG 180 and WG 200 models that share the same valve body architecture and hydraulic control layout. The 4657.302.015 can be used in both on-highway truck and off-highway industrial applications where the WG series is installed. For proper assembly, always pair this component with a new 4656301148: FIXING PLATE and a clean 4657301032: SCREEN SHEET to prevent debris from entering the hydraulic circuits.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 0631306792 | CYLINDRICAL PIN | Precision alignment dowel for valve body positioning |
| 0636100801 | CAP SCREW | Fastener securing the separator plate to the housing |
| 4656301148 | FIXING PLATE | Retains the screen sheet and prevents vibration loosening |
| 4657301032 | SCREEN SHEET | Fine mesh filter protecting hydraulic control circuits |
| 4657301033 | SCREEN SHEET | Alternative mesh filter for high-flow applications |
| 0636100803 | CAP SCREW | Longer fastener for thicker housing sections |
| 0750301003 | OIL FEED.HOUSG. | Distributes pressurized oil to the clutch packs |
| 4656301023 | GASKET | Seals the interface between valve body and case |
| 0736300182 | TORX SCREW | High-torque fastener for internal bore retainers |
| 0736300233 | TORX SCREW | Corrosion-resistant screw for external covers |
Frequently Asked Questions
Q: Can the 4657.302.015 be reused after a transmission rebuild?
A: ZF recommends always replacing this part with a new OEM unit during a major overhaul. The hardened surfaces wear microscopically over time, and reusing it can lead to premature hydraulic leakage.
Q: Is this part compatible with the WG 180 transmission?
A: Yes, the 4657.302.015 is shared across the WG 180, WG 190, and WG 200 families. Always verify the valve body casting number, but this component is a common fitment for all three series.
Q: What tools are needed to install this part?
A: Installation requires a torque wrench, a soft-faced mallet, and a set of hex keys. You will also need a new 4656301023: GASKET and 0736300182: TORX SCREW to ensure a leak-free seal.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
Request a Quote →
