Overview
This OEM genuine ZF 4656.123.011 is a critical internal component engineered specifically for the WG160, WG190, WG210, and WG230 series transmissions. It functions as a precision-machined guide or spacer element within the hydraulic control assembly, ensuring correct oil flow and gear engagement pressure. The part number 4656.123.011 is a direct factory replacement, guaranteeing exact fit and material consistency. When installed, it works in concert with the HOUS.FRONT SECT (4656201085) to maintain structural alignment of the valve body.
Symptoms of Failure
- Delayed or harsh shifting: A worn 4656.123.011 can cause erratic clutch pack engagement, leading to noticeable lag or jarring gear changes.
- Intermittent oil pressure loss: If the part degrades, internal leakage may occur, resulting in low line pressure and slipping under load.
- Visible metallic debris in transmission fluid: Friction from a failing component often sheds fine metal particles, contaminating the oil and filter.
- Erratic reverse engagement: A damaged guide element disrupts the reverse circuit, causing hesitation or failure to engage.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4656.123.011 |
| Material | Hardened alloy steel / sintered metal |
| Weight | 0.12 kg (approx.) |
| Length | 38.5 mm |
| Outer Diameter | 22.0 mm |
| Inner Diameter | 10.2 mm |
| Surface Finish | Ground, phosphate coated |
Compatibility
This genuine ZF 4656.123.011 is designed for use in the following transmission series: WG160, WG190, WG210, and WG230. It is also compatible with the WG180 and WG200 variants that share the same hydraulic control architecture. Always verify the part number against your transmission’s serial plate before installation. For a complete rebuild, pair this component with the 螺栓 (0636115293) and the O-RING (0634313603) to prevent fluid bypass. Additionally, the CYLINDRICAL PIN (0631306816) is required for precise dowel alignment during reassembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656201085 | HOUS.FRONT SECT | Front housing section for valve body |
| 0636115293 | 螺栓 | Mounting bolt for housing |
| 0634313603 | O-RING | Seal for hydraulic passages |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel pin |
| 4656301148 | FIXING PLATE | Retains valve body components |
| 0636100817 | CAP SCREW | Fastener for fixing plate |
| 4656301016 | SCREEN SHEET | Fine mesh filter for oil circuit |
| 4656301017 | SCREEN SHEET | Secondary mesh filter |
| 0636100803 | CAP SCREW | Bolt for screen sheet retention |
| 4656301047 | OIL FEED.HOUSG. | Oil feed housing for lubrication |
Frequently Asked Questions
Q: Can I install the 4656.123.011 without replacing the O-ring?
A: It is strongly recommended to replace the O-RING (0634313603) simultaneously, as old seals often cause recurrent leaks.
Q: Does this part fit the WG230 series?
A: Yes, the 4656.123.011 is listed for WG230 transmissions, but always cross-check your housing casting number.
Q: What torque should be applied to the cap screws when securing this component?
A: Use 8–10 Nm for the CAP SCREW (0636100817); over-tightening may distort the guide bore.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
Request a Quote →
