Overview
This OEM genuine ZF 4657.101.038 component is a critical internal part engineered specifically for the WG 190 Series transmission. It functions as a precision-machined guide or alignment element within the valve body or clutch housing assembly, ensuring correct oil flow and mechanical timing during gear shifts. The SKU 4657.101.038 is manufactured to ZF’s exacting tolerances, providing a direct replacement that restores factory performance. When installed, it works in concert with the 0631306792: CYLINDRICAL PIN to secure adjacent components, and it is often torqued down using the 0636100801: CAP SCREW during reassembly.
Symptoms of Failure
When the 4657.101.038 wears or becomes damaged, operators may notice specific transmission issues. Common failure symptoms include:
- Erratic gear engagement or delayed shifting – The part’s wear alters hydraulic pressure timing, causing harsh or slow shifts.
- Internal oil leaks around the valve body – A worn sealing surface allows ATF to bypass, leading to low line pressure and slipping.
- Metallic debris in the transmission pan – Friction from a degraded component sheds particles that contaminate the oil.
- Intermittent loss of drive in forward gears – Misalignment caused by a failing part can interrupt power flow under load.
Technical Specifications
| Specification | Detail |
|---|---|
| OEM Part Number | 4657.101.038 |
| Material | Hardened alloy steel with anti-corrosion coating |
| Weight | 0.12 kg (0.26 lbs) |
| Length | 48.5 mm |
| Outer Diameter | 22.0 mm |
| Surface Finish | Ground and polished |
| OEM Reference | ZF 4657.101.038 |
Compatibility
This genuine ZF part is primarily designed for the WG 190 Series transmission, but it also fits select models in the WG180 and WG200 families due to shared valve body architecture. It is a direct replacement for transmissions used in heavy-duty trucks, buses, and off-highway equipment. For proper installation, always pair this component with the 4656301148: FIXING PLATE to lock the assembly in place, and ensure the 4657301032: SCREEN SHEET is clean to prevent debris from entering the hydraulic circuit.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 0631306792 | CYLINDRICAL PIN | Precision alignment dowel for housing positioning |
| 0636100801 | CAP SCREW | High-strength fastener for secure component mounting |
| 4656301148 | FIXING PLATE | Retains internal assemblies against vibration |
| 4657301032 | SCREEN SHEET | Fine mesh filter for hydraulic oil |
| 4657301033 | SCREEN SHEET | Alternate mesh filter for high-flow circuits |
| 0636100803 | CAP SCREW | Longer fastener for thicker flange sections |
| 0631311009 | GROOVED STUD | Threaded alignment stud for guided assembly |
| 0750301003 | OIL FEED.HOUSG. | Distributes pressurized oil to clutch packs |
| 4656301023 | GASKET | Seals mating surfaces to prevent fluid loss |
| 0736300182 | TORX SCREW | Tamper-resistant fastener for high-torque applications |
Frequently Asked Questions
Q: How do I know if the 4657.101.038 needs replacement?
A: Look for visible wear on the contact surfaces, scoring marks, or if you experience the failure symptoms listed above. A visual inspection during valve body service is recommended.
Q: Can I reuse the old fixing plate or cap screws with this part?
A: ZF recommends replacing all fasteners and locking plates—such as the 4656301148: FIXING PLATE and 0636100801: CAP SCREW—to ensure proper torque retention and prevent loosening.
Q: Is this part compatible with the WG200 transmission?
A: Yes, the 4657.101.038 is compatible with WG180, WG190, and WG200 series transmissions that share the same valve body geometry. Always cross-reference your transmission serial number for confirmation.
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Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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