Overview
The ZF 4656.056.053 is a precision-engineered OEM genuine part designed specifically for the WG 160 Series transmission. This component plays a critical role in maintaining hydraulic pressure integrity and ensuring smooth gear engagement within the transmission’s valve body assembly. As a direct OEM replacement, the SKU 4656.056.053 guarantees exact fitment and factory-specified performance, eliminating the guesswork associated with aftermarket alternatives. When installed alongside the TRANSMISSION HOUSING, it forms a sealed unit that directs oil flow to critical clutch packs and planetary gearsets.
Symptoms of Failure
- Delayed or harsh shifting — A worn 4656.056.053 often causes hesitation when shifting between forward and reverse gears, particularly under load.
- Intermittent gear slipping — If this part loses its sealing capability, you may notice the transmission momentarily loses power during acceleration, a common long-tail search query for “WG160 slipping under load.”
- Low hydraulic pressure warnings — Internal leakage through a degraded component triggers pressure drops, leading to erratic shift patterns and potential overheating.
- Visible oil seepage — External leaks around the valve body area indicate the part has fatigued, requiring immediate replacement to prevent contamination of the HOUS.FRONT SECT.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4656.056.053 |
| OEM Reference | ZF 4656.056.053 |
| Material | Hardened alloy steel with corrosion-resistant coating |
| Weight | 0.85 kg (1.87 lbs) |
| Length | 142 mm |
| Width | 38 mm |
| Height | 28 mm |
| Operating Pressure | 12–18 bar |
| Temperature Range | -40°C to +120°C |
Compatibility
This genuine ZF part is primarily engineered for the WG 160 Series transmission, but it also cross-fits several other ZF heavy-duty models. Compatible transmissions include the WG 180, WG 200, and WG 210 series, provided they share the same valve body architecture. For applications using the HOUSING REAR PART (4656201035) or the HOUSING REAR PART (4472239178), verify the mounting bolt pattern matches your specific unit. Always consult your transmission’s serial number to confirm fitment before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101037 | TRANSMISSION HOUSING | Main structural casing that encloses all rotating components |
| 4656201075 | HOUS.FRONT SECT | Front section housing the torque converter and oil pump |
| 4656201035 | HOUSING REAR PART | Rear housing supporting output shaft and planetary gears |
| 4472239178 | HOUSING REAR PART | Alternate rear housing variant for specific gear ratios |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for precise housing positioning |
| 4656301148 | FIXING PLATE | Secures valve body components against vibration |
| 0636100817 | CAP SCREW | High-tensile fastener for housing attachment |
| 4656301016 | SCREEN SHEET | Fine mesh filter protecting hydraulic circuits |
| 4656301017 | SCREEN SHEET | Secondary filter screen for high-pressure lines |
| 0636100803 | CAP SCREW | M8 cap screw for valve body retention |
Frequently Asked Questions
Q: Can I install the 4656.056.053 without replacing the TRANSMISSION HOUSING?
A: Yes, this part is a standalone replacement. However, if the housing shows wear or cracks, we recommend replacing both simultaneously to ensure proper sealing.
Q: How do I know if my WG160 needs this specific part?
A: If you experience the failure symptoms listed above—especially low pressure or slipping—inspect the valve body area. The 4656.056.053 is often the culprit when shifting becomes unpredictable.
Q: Is this part interchangeable with aftermarket versions?
A: We strongly advise using only OEM genuine parts like this one. Aftermarket copies may have dimensional variances that compromise the seal against the HOUS.FRONT SECT or HOUSING REAR PART.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
Request a Quote →
