Overview
This OEM genuine ZF 4656.175.010 component is a critical internal control element specifically engineered for the WG 160 Series transmission. It functions as a precision-machined valve or actuator spool within the hydraulic control unit, directing oil flow to engage clutches and regulate gear shifts. The SKU 4656.175.010 sits directly within the main valve body assembly, interfacing with the TRANSMISSION HOUSING to ensure precise hydraulic pressure modulation. Without this part, the transmission cannot achieve correct shift timing or pressure hold.
Symptoms of Failure
- Erratic or delayed gear engagement: When the 4656.175.010 wears, internal leakage causes sluggish shifts, especially from Neutral to Drive or Reverse.
- Transmission slipping under load: A worn spool cannot maintain line pressure, leading to clutch slip during acceleration or hill climbs.
- Hydraulic fluid contamination: Metal debris from a failing 4656.175.010 circulates through the system, often clogging the SCREEN SHEET and reducing overall filtration efficiency.
- Intermittent no-shift conditions: The transmission may suddenly refuse to upshift or downshift due to stuck valve spools, often accompanied by warning codes.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4656.175.010 |
| Material | Hardened Steel / Aluminum Alloy |
| Weight | 0.85 kg (1.87 lbs) |
| Dimensions (L x W x H) | 120 mm x 45 mm x 30 mm |
| OEM Reference | ZF 4656.175.010 |
| Surface Finish | Phosphate coated / Corrosion resistant |
| Operating Pressure | Up to 20 bar (290 psi) |
Compatibility
This OEM genuine part is primarily designed for the ZF WG 160 Series transmission family. It is also compatible with the WG 180 and WG 200 models, as these share the same hydraulic control architecture. The 4656.175.010 interfaces directly with the HOUS.FRONT SECT and the HOUSING REAR PART to form a sealed hydraulic circuit. For heavy-duty applications, verify fitment with the HOUSING REAR PART variant used in later production runs.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101032 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4656201075 | HOUS.FRONT SECT | Front section housing pump and valve body |
| 4656201034 | HOUSING REAR PART | Rear section supporting output shaft |
| 4472239177 | HOUSING REAR PART | Alternate rear housing for WG160 |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing assembly |
| 0636100817 | CAP SCREW | Fastener for valve body retention |
| 4656301016 | SCREEN SHEET | Fine mesh filter for hydraulic fluid |
| 4656301017 | SCREEN SHEET | Alternative mesh filter variant |
| 0636100803 | CAP SCREW | Bolt for rear housing attachment |
| 4681301040 | OIL FEED.HOUSG. | Oil supply channel housing |
Frequently Asked Questions
Q: Can I replace the 4656.175.010 without removing the transmission?
A: In most WG160 applications, this part is accessible after removing the valve body cover and oil pan. However, due to its location near the HOUS.FRONT SECT, partial transmission disassembly is often required for proper access.
Q: What causes premature wear on this part?
A: Contaminated hydraulic fluid containing abrasive particles is the primary cause. Always inspect and replace the SCREEN SHEET simultaneously to prevent debris from damaging the new spool.
Q: Is this part interchangeable with aftermarket alternatives?
A: We strongly recommend using only OEM genuine ZF parts (SKU 4656.175.010) for this hydraulic control component. Aftermarket spools often have different internal clearances, leading to improper shift pressures and potential damage to the TRANSMISSION HOUSING.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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