Overview
This OEM genuine ZF 4656.006.102 component is a precision-engineered internal part designed specifically for the WG 115 Series transmission. It functions as a critical hydraulic control element, managing fluid pressure and flow within the valve body assembly to ensure precise clutch engagement and gear selection. The SKU 4656.006.102 is manufactured to ZF’s exacting tolerances, making it an essential replacement for maintaining factory-specified shift quality and torque handling in medium-duty commercial transmissions.
Symptoms of Failure
- Delayed or harsh shifting: When the 4656.006.102 wears, hydraulic pressure modulation becomes erratic, causing noticeable lag or jarring gear changes during acceleration.
- Intermittent gear slipping under load: A worn part can fail to maintain proper clutch pack pressure, leading to momentary loss of drive power, especially when climbing grades or hauling heavy loads.
- Transmission fluid contamination: Internal degradation of this component can generate fine metallic debris, which circulates through the system and accelerates wear on adjacent assemblies like the TRANSMISSION HOUSING.
- Erratic neutral-to-drive engagement: Drivers may experience a delayed or incomplete engagement when shifting from park or neutral into a forward gear, indicating insufficient hydraulic response.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4656.006.102 |
| Material | Hardened alloy steel with anti-corrosion coating |
| Weight | 0.85 kg (1.87 lbs) |
| Length | 142 mm |
| Width | 48 mm |
| Height | 32 mm |
| Operating Pressure Range | 8–18 bar |
| OEM Reference | ZF WG115 Series |
Compatibility
This genuine ZF 4656.006.102 part is engineered for the WG 115 Series transmission family. It is also compatible with the WG 180 and WG 200 models that share the same hydraulic control architecture. The component integrates directly with the HOUS.FRONT SECT and the HOUSING REAR PART to form a sealed hydraulic circuit. For full assembly restoration, it is often replaced alongside the HOUSING REAR SECTION to ensure proper alignment and sealing.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101057 | TRANSMISSION HOUSING | Main structural casing for gear and shaft assembly |
| 4656201075 | HOUS.FRONT SECT | Front section housing for pump and converter support |
| 4656201078 | HOUSING REAR PART | Rear housing section for output shaft support |
| 4656298050 | HOUSING REAR SECTION | Extended rear housing for PTO mounting |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing mating surfaces |
| 4656301148 | FIXING PLATE | Retaining plate for valve body components |
| 0636100817 | CAP SCREW | M10 fastening bolt for housing sections |
| 4656301016 | SCREEN SHEET | Fine mesh filter for hydraulic fluid |
| 4656301017 | SCREEN SHEET | Coarse mesh pre-filter for oil sump |
| 0636100803 | CAP SCREW | M8 fastening bolt for valve body |
Frequently Asked Questions
Q: Can the 4656.006.102 be replaced without removing the entire transmission?
A: Yes, in most WG115 applications, this component is accessible after draining the fluid and removing the transmission oil pan and valve body. However, we recommend consulting the ZF service manual for your specific model to confirm access requirements.
Q: How does this part interact with the HOUSING REAR SECTION?
A: The 4656.006.102 routes hydraulic fluid through passages that connect to the HOUSING REAR SECTION, which contains the output shaft lubrication circuit. A worn part can starve the rear section of oil, leading to bearing failure.
Q: What is the typical service life of this OEM part?
A: Under normal operating conditions with regular fluid changes, the 4656.006.102 typically lasts 300,000–500,000 km. Harsh duty cycles or contaminated fluid can reduce this lifespan significantly.
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Phone: +86 158 2286 3467 |
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