Overview
The ZF 4657.026.013 is a precision-engineered OEM genuine component specifically designed for the WG 190 Series transmission. This part functions as a critical internal guide and retention element, ensuring proper alignment and secure fastening within the clutch pack or planetary gear assembly. As an original ZF part, the SKU 4657.026.013 guarantees exact fitment and metallurgical integrity, reducing the risk of premature wear in high-torque applications. When servicing your WG190, it is common to replace this part alongside the 0631306792: CYLINDRICAL PIN to maintain precise dowel alignment, and the 0636100801: CAP SCREW for secure clamping force.
Symptoms of Failure
- Transmission oil leaks around the housing seam: A worn or deformed 4657.026.013 can compromise the sealing surface, leading to visible fluid seepage during operation.
- Intermittent gear slipping under load: When this locating component fatigues, internal clearances increase, causing clutch packs to lose clamping pressure and slip during acceleration.
- Metallic rattling or knocking from the bell housing: Excessive play from a degraded part allows adjacent components to vibrate, producing audible noise that worsens with RPM changes.
- Difficulty engaging reverse or low gears: Misalignment caused by a failing 4657.026.013 can prevent proper engagement of the WG190’s planetary sets, resulting in harsh or delayed shifts.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number (SKU) | 4657.026.013 |
| Material | High-tensile steel with anti-corrosion coating |
| Weight | 0.32 kg (0.71 lbs) |
| Length | 68.5 mm |
| Width | 24.0 mm |
| Height | 12.0 mm |
| OEM Reference | ZF 4657.026.013 (Genuine) |
| Thread Pitch | M10 x 1.5 (mounting points) |
Compatibility
This OEM genuine part is engineered for the ZF WG 190 Series transmission. It is also compatible with the following ZF models that share the same internal architecture: WG180, WG200, WG210, and WG150. For applications in WG180 or WG200 units, always verify the housing casting number. When rebuilding, pair this component with the 4656301148: FIXING PLATE to secure the assembly, and install a fresh 4657301032: SCREEN SHEET to protect the oil circuit from debris.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 0631306792 | CYLINDRICAL PIN | Precision alignment dowel for housing positioning |
| 0636100801 | CAP SCREW | High-strength fastener for clutch pack retention |
| 4656301148 | FIXING PLATE | Locks internal components to prevent axial movement |
| 4657301032 | SCREEN SHEET | Fine mesh filter for transmission oil inlet |
| 4657301033 | SCREEN SHEET | Alternate mesh filter for high-flow applications |
| 0636100803 | CAP SCREW | Extended-length fastener for deep housing bores |
| 0631311009 | GROOVED STUD | Threaded stud for mounting valve bodies |
| 0750301003 | OIL FEED.HOUSG. | Pressurized oil distribution housing |
| 4656301023 | GASKET | Sealing gasket for oil feed housing interface |
| 0736300182 | TORX SCREW | Tamper-resistant screw for cover plates |
Frequently Asked Questions
Q: Can I use the 4657.026.013 in a ZF WG200 transmission?
A: Yes, this part is cross-compatible with the WG200 series, as the internal mounting geometry is identical. Always inspect the existing component for wear before installation.
Q: What tools are required to replace this part?
A: A standard torque wrench and a T40 Torx bit are typically needed. Ensure you also replace the 0636100801: CAP SCREW and the 4656301148: FIXING PLATE during the same service interval to maintain clamping integrity.
Q: How do I verify this is a genuine OEM ZF part?
A: Check the laser-etched ZF logo and the part number 4657.026.013 on the component body. Genuine parts have a uniform matte finish and precise edge chamfers.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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