Overview
The ZF 4616.306.128 COVER PLATE is a critical sealing and protective component engineered specifically for the WG 65 series transmission. Positioned on the rear section of the gearbox housing, this OEM genuine part ensures that internal lubricants remain contained while shielding sensitive internal assemblies from external contaminants. The SKU 4616.306.128 serves as the factory-specified cover plate that interfaces directly with the 4616105413: OUTPUT shaft assembly and the 4616101127: TRANSMISSION HOUSING, forming a sealed boundary that maintains hydraulic pressure and prevents debris ingress. Without this cover plate, the transmission’s internal environment would be compromised, leading to accelerated wear of adjacent components.
Symptoms of Failure
When the ZF 4616.306.128 cover plate deteriorates, operators typically encounter these specific failure indicators:
- Oil seepage around the rear housing joint – A common sign that the cover plate gasket surface has warped or corroded, causing gradual lubricant loss.
- Gear engagement hesitation or slipping – As the cover plate loses its seal, hydraulic pressure drops, leading to delayed clutch pack application and erratic shifting behavior.
- Visible cracks or deformation on the plate surface – Physical inspection may reveal stress fractures, particularly near bolt holes where the 0636011038: HEXAGON SCREW fasteners secure the assembly.
- Contaminated transmission fluid – A compromised cover plate allows dirt and moisture to enter the housing, resulting in gritty or discolored oil that accelerates internal wear.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4616.306.128 |
| Material | Die-cast aluminum alloy with corrosion-resistant coating |
| Overall Dimensions | Approx. 180 mm x 120 mm x 8 mm |
| Weight | 0.65 kg (1.43 lbs) |
| OEM Reference | ZF 4616.306.128 (Genuine) |
| Mounting Holes | 6 positions for M10 hexagon screws |
| Sealing Surface | Machined flat with O-ring groove |
Compatibility
This cover plate is primarily designed for the WG 65 Series transmission family. Based on its structural design and bolt pattern, it is also compatible with the following ZF models that share the same rear housing architecture: WG180, WG200, WG210, and WG250. The part integrates directly with the 4616203017: OUTPUT FLANGE and requires the use of specific fasteners such as the 0636011038: HEXAGON SCREW for proper torque retention. Always verify your transmission serial number against the OEM parts catalog to ensure exact fitment before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616105413 | OUTPUT | Transfers rotational force from the transmission to the driveline |
| 4616203017 | OUTPUT FLANGE | Connects output shaft to the driveshaft yoke |
| 4616101127 | TRANSMISSION HOUSING | Main structural casing that encloses all internal gear sets |
| 0636011038 | HEXAGON SCREW | Secures cover plate to the transmission housing |
| 0636016015 | HEXAGON SCREW | Alternate fastener for output flange mounting |
| 0631306085 | CYLINDRICAL PIN | Alignment dowel for precise component positioning |
| 0634313118 | O-RING | Seals the cover plate-to-housing interface |
| 0732611049 | FILTER INSERT | Traps particulate contaminants in the hydraulic circuit |
| 0634303718 | O-RING | Secondary seal for output shaft bore |
| 0636610082 | STUD | Threaded rod for mounting auxiliary brackets |
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