Overview
The ZF 4616.301.156 COVER is a critical sealing component designed specifically for the WG 65 series transmission. This OEM genuine part encloses the rear section of the transmission housing, protecting internal gear sets and hydraulic components from contaminants while maintaining proper oil pressure. As a factory-original ZF component, the 4616.301.156 cover ensures precise fitment and long-term durability in heavy-duty industrial applications. This cover is mounted directly to the 4616101065: TRANSMISSION HOUSING using a series of high-strength fasteners, including the 0636011038: HEXAGON SCREW, 0636011118: HEXAGON SCREW, and 0636016015: HEXAGON SCREW.
Symptoms of Failure
- External oil seepage around the rear transmission flange: When the cover gasket or sealing surface degrades, pressurized transmission fluid escapes, leaving visible wet spots on the housing exterior.
- Contaminated transmission fluid from debris ingress: A cracked or warped cover allows dirt and moisture to enter the system, leading to accelerated wear on bearings and clutch packs.
- Unusual whining or grinding noises during gear engagement: Loss of structural integrity in the cover can misalign internal shafts, causing metal-on-metal contact within the WG 65 assembly.
- Erratic shift quality or delayed engagement: Reduced hydraulic pressure from a compromised cover seal disrupts clutch application timing, resulting in harsh or slipping shifts.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4616.301.156 |
| Material | Die-cast aluminum alloy (A380) |
| Overall Diameter | 285 mm |
| Thickness | 18 mm |
| Weight | 1.42 kg |
| OEM Reference | ZF 4616.301.156 |
| Surface Finish | Anodized, corrosion-resistant |
| Mounting Bolt Pattern | 8x M10 threaded holes |
Compatibility
This cover is engineered for the ZF WG 65 series, but it also fits select models in the WG180 and WG200 families due to shared housing architecture. Specific compatible transmissions include the WG 65-6, WG 65-7, WG 180-6, and WG 200-8. Always verify your transmission serial number against the 4616.301.156 part number before installation. For complete assembly, pair this cover with the 0631306085: CYLINDRICAL PIN for alignment and the 0634313118: O-RING for sealing integrity.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101065 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 0636011038 | HEXAGON SCREW | M10 fastener for cover mounting |
| 0636011118 | HEXAGON SCREW | M12 fastener for housing attachment |
| 0636016015 | HEXAGON SCREW | M8 fastener for auxiliary bracket |
| 0631306085 | CYLINDRICAL PIN | Alignment dowel for cover positioning |
| 0634313118 | O-RING | Static seal between cover and housing |
| 0636304019 | SCREW PLUG | Drain port closure for fluid service |
| 0634801152 | SEALING RING | Copper gasket for plug sealing |
| 0732611049 | FILTER INSERT | Hydraulic fluid filtration element |
| 0634303718 | O-RING | Secondary seal for filter housing |
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