Overview
The ZF 4656.006.120 is a precision-engineered OEM genuine component specifically designed for the WG 115 Series transmission. This part serves as a critical sealing and alignment interface within the transmission’s hydraulic control system, ensuring proper fluid pressure regulation and gear engagement. As a factory-original part, the SKU 4656.006.120 guarantees exact fitment and durability, reducing the risk of premature wear. It is typically mounted in the valve body or clutch housing area, where it interacts with the TRANSMISSION HOUSING to maintain structural integrity under high torque loads.
Symptoms of Failure
When the ZF 4656.006.120 begins to degrade, operators may notice specific performance issues. Look for these common failure signs:
- Hydraulic fluid seepage around the transmission housing joint, often visible as wet spots or drips near the bell housing.
- Delayed or harsh gear shifts due to loss of pressure regulation, especially when transitioning between forward and reverse.
- Unusual whining or grinding noises during acceleration, indicating misalignment or insufficient lubrication in the valve body area.
- Intermittent transmission slipping under load, particularly in lower gears, which can escalate to complete loss of drive if ignored.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4656.006.120 |
| Material | High-grade aluminum alloy with steel insert |
| Weight | 0.85 kg (1.87 lbs) |
| Dimensions (L x W x H) | 145 mm x 85 mm x 40 mm |
| OEM Reference | ZF 4656.006.120 (Genuine) |
| Sealing Type | Integrated O-ring groove |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This OEM part is primarily engineered for the ZF WG 115 Series transmission, but it also fits select models in the WG180 and WG200 families due to shared hydraulic architecture. It is commonly used in medium-duty commercial vehicles, agricultural tractors, and construction equipment. For proper installation, ensure the HOUS.FRONT SECT and HOUSING REAR PART are free from cracks or corrosion. In some applications, the HOUSING REAR SECTION must also be inspected for wear to ensure a proper seal.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing sections |
| 4656301148 | FIXING PLATE | Secures valve body components |
| 0636100817 | CAP SCREW | Fastens housing to transmission case |
| 4656301016 | SCREEN SHEET | Filters debris from hydraulic fluid |
| 4656301017 | SCREEN SHEET | Secondary filtration for fine particles |
| 0636100803 | CAP SCREW | Mounting bolt for rear housing section |
Frequently Asked Questions
Q: Can the ZF 4656.006.120 be reused after removal?
A: No. This is a single-use sealing component. Reusing it can lead to fluid leaks and pressure loss. Always replace with a new OEM genuine part.
Q: How do I know if this part fits my WG115 transmission?
A: Verify the transmission serial number and compare it to the OEM parts list. The 4656.006.120 is specific to WG115 models built after 2015. If unsure, inspect the existing part for the same SKU stamping.
Q: What tools are needed for installation?
A: Standard metric socket set, torque wrench (specs: 25 Nm for cap screws), and a sealant applicator. Always consult the ZF service manual for torque sequences.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
Request a Quote →
