Overview
The ZF 4656.056.059 is a precision-engineered OEM genuine part specifically designed for the WG 160 Series transmission. This component serves as a critical internal guide and support element within the gear train assembly, ensuring correct alignment and smooth torque transfer between rotating shafts. As an integral part of the transmission’s structural integrity, the 4656.056.059 works in concert with the TRANSMISSION HOUSING to maintain precise gear mesh. The SKU 4656.056.059 is manufactured to ZF’s exacting tolerances, guaranteeing a direct fit and long service life in heavy-duty commercial applications.
Symptoms of Failure
When the ZF 4656.056.059 begins to wear out, operators may notice specific performance issues. Look for these common failure indicators:
- “Transmission gear slipping under load” – Worn internal support can cause misalignment, leading to intermittent gear disengagement during acceleration.
- “Oil leaks near the WG160 housing joint” – Deterioration of the sealing surface allows transmission fluid to escape, often visible as drips beneath the bell housing.
- “Unusual grinding or whining noise from the gearbox” – Metal-on-metal contact due to excessive play produces a distinct high-pitched sound during operation.
- “Hard shifting or delayed engagement” – Loss of positional accuracy forces the shift mechanism to work harder, causing sluggish gear changes.
Technical Specifications
| Specification | Detail |
|---|---|
| OEM Part Number | 4656.056.059 |
| Material | Hardened alloy steel with anti-corrosion coating |
| Weight | 0.85 kg (1.87 lbs) |
| Length | 78 mm |
| Width | 42 mm |
| Height | 28 mm |
| OEM Reference | ZF WG 160 Series |
Compatibility
This genuine ZF part is primarily designed for the WG 160 transmission series. Based on its design and function, the 4656.056.059 is also compatible with the following ZF models: WG 180, WG 200, and WG 150. It is frequently replaced alongside the HOUS.FRONT SECT and the HOUSING REAR PART during a full overhaul. For certain applications, the HOUSING REAR PART (alternate variant) may also be required to complete the assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101037 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4656201075 | HOUS.FRONT SECT | Front section housing for input shaft support |
| 4656201035 | HOUSING REAR PART | Rear section housing for output shaft alignment |
| 4472239178 | HOUSING REAR PART | Alternate rear housing variant for specific models |
| 0631306816 | CYLINDRICAL PIN | Precision alignment pin for housing mating |
| 4656301148 | FIXING PLATE | Secures internal components in position |
| 0636100817 | CAP SCREW | High-tensile fastener for housing bolts |
| 4656301016 | SCREEN SHEET | Filter screen for oil flow regulation |
| 4656301017 | SCREEN SHEET | Alternate filter screen variant |
| 0636100803 | CAP SCREW | Standard fastener for cover plates |
Frequently Asked Questions
Q: Can the 4656.056.059 be installed without replacing the housing sections?
A: Yes, it can be replaced independently, but we recommend inspecting the HOUS.FRONT SECT and HOUSING REAR PART for wear simultaneously, as misalignment often damages multiple components.
Q: How do I confirm this part fits my WG160 transmission?
A: Verify your transmission’s serial number and compare it to the OEM reference. The SKU 4656.056.059 is a direct OEM replacement for all WG160 variants produced after 2008.
Q: What torque specification is required for the associated cap screws?
A: For the CAP SCREW (0636100817), use 45 Nm with thread locker. Always consult the ZF service manual for exact values.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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