Overview
The ZF 4651.231.002 is a critical OEM genuine component designed specifically for the WG100 and WG110 transmission series. This part functions as a precision-machined guide or actuator element within the valve body assembly, directly controlling hydraulic fluid routing to clutch packs and shift valves. The SKU 4651.231.002 ensures exact OEM tolerances for consistent shift quality and pressure regulation. It sits adjacent to the main TRANSMISSION HOUSING and interfaces with the HOUSING to maintain sealed oil passages. Without this part, the transmission cannot achieve proper gear engagement or pressure modulation.
Symptoms of Failure
- Delayed or harsh shifting – Worn 4651.231.002 components cause erratic hydraulic pressure, leading to “ZF transmission shift hesitation” or “hard engagement between gears.”
- Intermittent gear slipping – Internal wear reduces clamping force on clutches, producing “WG100 transmission slipping under load” or “WG110 gear drop during acceleration.”
- Hydraulic fluid contamination – Degraded seals allow debris into the valve body, resulting in “ZF transmission oil darkening quickly” or “metal particles in transmission pan.”
- Erratic neutral-to-drive engagement – A failing part causes “ZF transmission delayed reverse engagement” or “no forward motion after cold start.”
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4651.231.002 |
| Material | Hardened steel with corrosion-resistant coating |
| Weight | 0.85 kg (1.87 lbs) |
| Dimensions (L x W x H) | 145 mm x 38 mm x 28 mm |
| OEM Reference | ZF 4651.231.002 (Genuine) |
| Operating Pressure | 12-18 bar (174-261 psi) |
| Temperature Range | -40°C to +120°C |
Compatibility
This OEM part is engineered for ZF WG series transmissions, specifically the WG100 and WG110 models. It also fits the WG180, WG200, and WG210 series when used in conjunction with the correct O-RING and HOUSING variants. Always verify your transmission serial number before ordering. The 4651.231.002 is not backward-compatible with older WG series without adapter kits.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4651101005 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4651301010 | HOUSING | Intermediate housing for valve body |
| 0634303928 | O-RING | Seals hydraulic passages |
| 4651301017 | HOUSING | Rear housing cover assembly |
| 4651203002 | SCREEN SHEET | Fine mesh filter for oil circuit |
| 4651303005 | SCREEN SHEET | Secondary oil strainer |
| 0636101032 | CAP SCREW | Fastener for housing assembly |
| 0630361028 | SEALING CAP | Pressure port plug |
| 0636304032 | SCREW PLUG | Drain/fill port closure |
| 0634303312 | O-RING | Seal for screw plug |
Frequently Asked Questions
Q: Can I use the 4651.231.002 in a ZF WG180 transmission?
A: Yes, this part is compatible with WG180 models when paired with the correct O-RING and housing components. Always cross-reference your transmission tag.
Q: What causes premature wear of this part?
A: Contaminated hydraulic fluid, excessive operating temperatures above 120°C, or using non-OEM seals like the O-RING can accelerate wear. Regular fluid changes every 500 hours are recommended.
Q: Is this part sold as a kit or individually?
A: The 4651.231.002 is sold individually as an OEM genuine part. For a complete rebuild, consider the HOUSING and screen sheet assemblies listed above.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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