Overview
The ZF 4656.056.050 is a precision-engineered OEM genuine component designed specifically for the WG 160 Series transmission. This part functions as a critical sealing and alignment element within the gear train assembly, ensuring proper oil flow and pressure regulation between the main housing sections. The SKU 4656.056.050 is manufactured to ZF’s exacting tolerances, making it a direct replacement for worn units in heavy-duty commercial vehicle transmissions. When installed alongside the TRANSMISSION HOUSING, this component maintains structural integrity and prevents contamination ingress that can lead to premature wear.
Symptoms of Failure
- Oil seepage at the housing joint: A worn 4656.056.050 often causes visible transmission fluid leaks where the HOUS.FRONT SECT meets the main casing, leading to low fluid levels and potential gear damage.
- Intermittent gear slipping under load: When this part degrades, hydraulic pressure drops can cause the transmission to momentarily lose engagement, especially during uphill climbs or heavy towing.
- Abnormal whining or grinding noises: A failing 4656.056.050 allows metal-on-metal contact between the HOUSING REAR PART and rotating elements, producing audible distress signals.
- Delayed engagement when shifting: Worn sealing surfaces reduce hydraulic circuit efficiency, causing a noticeable lag when moving from neutral to drive or reverse.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 4656.056.050 |
| Material | High-grade aluminum alloy with nitrile sealing surface |
| Weight | 0.85 kg (1.87 lbs) |
| Outer Diameter | 120 mm |
| Inner Diameter | 85 mm |
| Thickness | 18 mm |
| OEM Reference | ZF 4656.056.050 (Genuine) |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This genuine ZF 4656.056.050 part is primarily engineered for the WG 160 Series transmission family. Based on its design and sealing profile, it is also compatible with the following ZF models: WG 180, WG 200, WG 210, and WG 250 series transmissions used in municipal trucks, refuse vehicles, and construction equipment. For proper installation, always pair this component with a new HOUSING REAR PART to ensure optimal sealing performance and prevent recurring failures.
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 support |
| 4656201037 | HOUSING REAR PART | Rear housing section for output shaft alignment |
| 4472239180 | HOUSING REAR PART | Alternate rear housing variant for WG series |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing positioning |
| 4656301148 | FIXING PLATE | Retention plate for securing internal components |
| 0636100817 | CAP SCREW | Fastener for housing attachment points |
| 4656301016 | SCREEN SHEET | Filter screen for oil sump protection |
| 4656301017 | SCREEN SHEET | Secondary filter screen for hydraulic circuit |
| 0636100803 | CAP SCREW | Threaded fastener for cover plate mounting |
Frequently Asked Questions
Q: Can the ZF 4656.056.050 be reused after a transmission overhaul?
A: No. This is a single-use sealing component. Reusing it after disassembly will almost certainly result in oil leaks and pressure loss. Always install a new OEM genuine 4656.056.050 during any rebuild.
Q: How do I know if my WG 160 needs this specific part?
A: If you observe oil weeping from the seam between the transmission housing and the front section, or if your transmission exhibits erratic shifting behavior, the 4656.056.050 is likely the culprit. A visual inspection for cracks or deformation on the sealing face will confirm wear.
Q: Is this part interchangeable with aftermarket alternatives?
A: While aftermarket versions exist, only the OEM genuine ZF 4656.056.050 guarantees the exact material hardness and dimensional tolerances required for the WG 160 series. Non-OEM parts often fail prematurely, causing collateral damage to the HOUS.FRONT SECT and other costly assemblies.
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Phone: +86 158 2286 3467 |
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