Overview
The ZF 4656.056.036 is a precision-engineered OEM genuine part specifically designed for the WG 160 Series transmission. This component serves as a critical interface element within the hydraulic control assembly, ensuring proper fluid routing and pressure regulation during gear shifts. As an integral part of the valve body system, the 4656.056.036 works in concert with the TRANSMISSION HOUSING to maintain consistent oil flow and prevent cross-contamination between circuits. The SKU 4656.056.036 is manufactured to ZF’s exacting tolerances, making it a direct replacement for worn units in WG160 transmissions operating in heavy-duty commercial vehicles.
Symptoms of Failure
When the ZF 4656.056.036 begins to degrade, operators typically notice three distinct failure modes. First, erratic shift timing occurs as internal sealing surfaces lose integrity, causing delayed engagement between gears. Second, low hydraulic pressure warnings appear on the dashboard, often accompanied by a whining noise from the transmission pump. Third, visible oil seepage around the valve body area indicates the part has developed micro-cracks, leading to fluid loss and potential overheating. If you experience “ZF WG160 hard shifting when cold” or “transmission oil leak near bell housing,” this component should be inspected immediately.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4656.056.036 |
| Material | Die-cast aluminum alloy (A380) |
| Weight | 0.85 kg (1.87 lbs) |
| Overall Length | 142 mm |
| Width | 68 mm |
| Height | 35 mm |
| OEM Reference | ZF 4656.056.036 |
| Seal Type | Nitrile rubber O-ring (integrated) |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This genuine ZF part is primarily engineered for the WG 160 Series transmission, but it also fits select models in the WG180 and WG200 families when used with the correct adapter kit. The 4656.056.036 is compatible with all WG160 variants including the WG160-6, WG160-8, and WG160-10. For installations requiring additional structural support, pair this component with the HOUS.FRONT SECT and the HOUSING REAR PART to ensure proper alignment. In WG200 applications, the HOUSING REAR PART (4472239180) is required for secure mounting.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101038 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4656201075 | HOUS.FRONT SECT | Front section housing for input shaft |
| 4656201037 | HOUSING REAR PART | Rear housing for output shaft support |
| 4472239180 | HOUSING REAR PART | Alternate rear housing for WG200 |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing mating |
| 4656301148 | FIXING PLATE | Retention bracket for valve body |
| 0636100817 | CAP SCREW | M8 x 25mm fastener for housing |
| 4656301016 | SCREEN SHEET | Fine mesh filter for oil intake |
| 4656301017 | SCREEN SHEET | Coarse mesh pre-filter |
| 0636100803 | CAP SCREW | M6 x 20mm fastener for cover plate |
Frequently Asked Questions
Q: Can the 4656.056.036 be replaced without removing the entire transmission?
A: Yes, this part is accessible after draining the transmission fluid and removing the valve body cover. However, we recommend replacing the CYLINDRICAL PIN and FIXING PLATE simultaneously to ensure proper alignment.
Q: What is the typical lifespan of this OEM part in a WG160 transmission?
A: Under normal operating conditions with regular fluid changes every 50,000 km, the 4656.056.036 typically lasts 300,000 to 400,000 km before showing signs of wear.
Q: Does this part require special tools for installation?
A: Standard metric socket set and torque wrench are sufficient. Use the CAP SCREW (0636100817) and CAP SCREW (0636100803) for proper fastening torque values.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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