Overview
The ZF 4644.306.005 COVER is a critical sealing component designed for the WG 180 and WG 200 transmission series. This OEM genuine part encloses the rear section of the transmission housing, protecting internal components from contamination while maintaining proper hydraulic pressure. As a direct-fit replacement, the SKU 4644.306.005 ensures precise alignment with the 4616101065 TRANSMISSION HOUSING assembly, preventing debris ingress and fluid loss during high-torque operations. Manufactured to ZF’s original specifications, this cover is essential for maintaining the structural integrity of the gearbox in heavy-duty industrial applications.
Symptoms of Failure
- Oil leaks around the rear cover seal: A worn 4644.306.005 cover often causes visible hydraulic fluid seepage near the transmission output flange, especially under load.
- Gear slipping under load: When the cover loses its sealing integrity, pressure drops can lead to erratic clutch engagement and power loss during acceleration.
- Contaminated transmission fluid: A cracked or warped cover allows dirt and moisture to enter the system, causing premature wear on internal components like the 0636011038 HEXAGON SCREW fasteners.
- Abnormal noise from the rear housing: Loose cover mounting due to degraded 0636011118 HEXAGON SCREW connections can produce rattling or grinding sounds during operation.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4644.306.005 |
| Material | Die-cast aluminum alloy (A380) |
| Dimensions (L x W x H) | 320 mm x 180 mm x 45 mm |
| Weight | 1.85 kg (4.08 lbs) |
| OEM Reference | ZF 4644.306.005 |
| Surface Finish | Anodized black |
| Mounting Holes | 8 x M10 threaded bores |
Compatibility
This cover is engineered for the ZF WG 180 and WG 200 series transmissions, commonly found in construction vehicles, agricultural machinery, and marine propulsion systems. It directly replaces the original equipment cover on WG 180, WG 200, and select WG 65 variants. For proper installation, use the 0636016015 HEXAGON SCREW kit to secure the cover to the transmission housing. Always pair this cover with new sealing components such as the 0634313118 O-RING to ensure leak-free operation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101065 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 0636011038 | HEXAGON SCREW | Fastener for cover mounting |
| 0636011118 | HEXAGON SCREW | Secondary fastener for housing |
| 0636016015 | HEXAGON SCREW | High-torque bolt for cover |
| 0631306085 | CYLINDRICAL PIN | Alignment pin for cover positioning |
| 0634313118 | O-RING | Primary seal between cover and housing |
| 0636304019 | SCREW PLUG | Drain/fill port plug |
| 0634801152 | SEALING RING | Gasket for plug threads |
| 0732611049 | FILTER INSERT | Hydraulic fluid filtration element |
| 0634303718 | O-RING | Secondary seal for filter housing |
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