Overview
The ZF 4651.151.026 is a critical OEM genuine component engineered specifically for the WG 110 Series transmission. This precision-machined part functions as a key interface element within the valve body and hydraulic control assembly, regulating fluid pressure and directing oil flow to ensure smooth gear engagement. As a factory-spec replacement, the SKU 4651.151.026 restores original shift quality and prevents internal cross-leakage. When installed alongside a robust TRANSMISSION HOUSING, it maintains the structural integrity required for heavy-duty industrial applications.
Symptoms of Failure
- Erratic or delayed shifting: A worn 4651.151.026 can cause hydraulic pressure loss, leading to hesitation when moving from neutral to drive or reverse.
- Internal transmission oil leaks: Deterioration of sealing surfaces around this part often results in visible fluid seepage near the valve body area.
- Gear slippage under load: When this component fails to maintain proper oil channel isolation, the transmission may slip during acceleration or while climbing grades.
- Harsh engagement: A failing part disrupts the modulation of clutch pack pressure, producing jarring shifts that worsen over time.
Technical Specifications
| Specification | Detail |
|---|---|
| OEM Part Number | 4651.151.026 |
| Material | High-grade aluminum alloy with hardened steel inserts |
| Weight | 0.85 kg (1.87 lbs) |
| Dimensions (L x W x H) | 145 mm x 80 mm x 35 mm |
| Surface Finish | Anodized corrosion-resistant coating |
| OEM Reference | ZF WG 110 Series |
Compatibility
While the 4651.151.026 is primarily designed for the WG 110 transmission, it is also compatible with select ZF models that share the same hydraulic architecture, including the WG 180 and WG 200 series. This part interfaces directly with the HOUSING (4651301032) and the HOUSING (4651301033) to create a sealed pressure chamber. For leak-free operation, always replace the O-RING (0634303928) during installation. Verify your transmission model code before ordering to ensure correct fitment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4651101013 | TRANSMISSION HOUSING | Main structural casing for gear and shaft assembly |
| 4651301032 | HOUSING | Secondary housing for valve body support |
| 0634303928 | O-RING | Seals hydraulic fluid passages |
| 4651301033 | HOUSING | Lower housing cover for oil distribution |
| 4651203002 | SCREEN SHEET | Filters debris from hydraulic oil |
| 4651303005 | SCREEN SHEET | Fine mesh filter for valve body protection |
| 0636101032 | CAP SCREW | Fastens housing components securely |
| 0630361028 | SEALING CAP | Prevents contamination of open ports |
| 4475280060 | SCREW PLUG | Closes oil passages during service |
| 0634303312 | O-RING | Secondary seal for pressure lines |
Frequently Asked Questions
Q: How do I know if the 4651.151.026 is the correct part for my WG110 transmission?
Check the stamped serial number on your transmission’s data plate. This part is specifically listed for WG 110 series units, but cross-reference with your OEM parts manual to confirm compatibility with your exact build date.
Q: Can I reuse the old O-ring when installing this part?
No. Always install a new O-RING (0634303928) to guarantee a proper seal. Reusing old seals is the most common cause of post-service hydraulic leaks.
Q: What torque specification should I use for the mounting bolts?
ZF recommends 25 Nm (18.4 ft-lbs) for the cap screws securing this component. Over-tightening can distort the housing and cause internal binding.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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