Overview
The ZF 4656.006.012 is a precision-engineered OEM genuine component designed specifically for the WG 115 Series transmission. This part serves as a critical interface within the hydraulic control system, regulating fluid flow and pressure to ensure smooth gear engagement and consistent torque delivery. Positioned within the valve body assembly, the 4656.006.012 works in concert with the TRANSMISSION HOUSING to maintain proper alignment and sealing under high thermal loads. The SKU 4656.006.012 is manufactured to ZF’s original tolerances, guaranteeing a direct fit without modification.
Symptoms of Failure
- Erratic shifting or delayed engagement: When the 4656.006.012 wears, internal leakage causes inconsistent hydraulic pressure, leading to harsh or delayed gear changes.
- Transmission fluid seepage: Deterioration of sealing surfaces results in oil leaks around the valve body area, often visible as drips near the HOUS.FRONT SECT interface.
- Loss of power under load: A failing part cannot maintain line pressure, causing the transmission to slip when climbing grades or carrying heavy loads.
- Unusual whining or buzzing noises: Cavitation from restricted fluid passages produces audible sounds, particularly during cold starts.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (SKU) | 4656.006.012 |
| OEM Reference | ZF 4656.006.012 (Genuine) |
| Material | Hardened alloy steel with corrosion-resistant coating |
| Weight | 0.42 kg (0.93 lbs) |
| Overall Length | 78.5 mm |
| Outer Diameter | 32.0 mm |
| Seal Type | Nitrile rubber O-ring (integrated) |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This genuine ZF 4656.006.012 part is primarily engineered for the WG 115 Series transmissions. It is also compatible with select models in the WG180 and WG200 families that share the same valve body architecture. The part integrates directly with the HOUSING REAR PART and the HOUSING REAR PART (alternate variant) to form a sealed hydraulic circuit. Always verify your transmission serial number before ordering to ensure correct fitment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101037 | TRANSMISSION HOUSING | Main structural casing that supports all internal components |
| 4656201075 | HOUS.FRONT SECT | Front section housing that aligns the input shaft and pump |
| 4656201035 | HOUSING REAR PART | Rear housing section that encloses the output shaft assembly |
| 4472239178 | HOUSING REAR PART | Alternate rear housing variant for specific WG115 builds |
| 0631306816 | CYLINDRICAL PIN | Precision dowel pin for aligning housing sections |
| 4656301148 | FIXING PLATE | Secures valve body components against vibration |
| 0636100817 | CAP SCREW | M8x20 bolt for fastening housing flanges |
| 4656301016 | SCREEN SHEET | Fine mesh filter for hydraulic fluid intake |
| 4656301017 | SCREEN SHEET | Alternate mesh filter with different micron rating |
| 0636100803 | CAP SCREW | M6x16 bolt for securing accessory brackets |
Frequently Asked Questions
Q: Can the 4656.006.012 be installed without removing the transmission?
A: In most WG115 applications, the part is accessible after draining the fluid and removing the valve body cover. However, clearance may be tight; we recommend consulting the ZF service manual for your specific model.
Q: How does this part differ from aftermarket alternatives?
A: The OEM genuine 4656.006.012 uses ZF-specified steel alloys and surface treatments that aftermarket parts often omit. This ensures consistent sealing under thermal cycling and prevents premature wear of the HOUS.FRONT SECT mating surface.
Q: What is the typical service life of this component?
A: Under normal operating conditions with regular fluid changes, the 4656.006.012 can last 300,000 to 500,000 km. Failure often accelerates if contaminated fluid is used or if the transmission is frequently overloaded.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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