Overview
The ZF 4616.301.306 HOUSING COVER is a critical structural component engineered specifically for the WG 65 Series transmission. This OEM genuine part seals the main transmission housing, protecting internal gear sets and hydraulic circuits from contaminants while maintaining proper oil pressure. The SKU 4616.301.306 sits at the rear section of the transmission assembly, directly interfacing with the 4616105413: OUTPUT shaft and the 4616203017: OUTPUT FLANGE. Precision-machined to ZF factory tolerances, this cover ensures reliable torque transfer and prevents fluid migration between chambers. When paired with the 4616101117: TRANSMISSION HOUSING, it forms a sealed enclosure that withstands high thermal and mechanical loads in heavy-duty industrial applications.
Symptoms of Failure
- Oil leaks at the rear housing interface – Worn gasket surfaces or cracked cover material cause transmission fluid to seep around the mating flange, often visible as drips under the vehicle or equipment.
- Gear slipping under load – A compromised housing cover reduces internal hydraulic pressure, leading to delayed engagement or clutch pack slippage during acceleration.
- Contaminated transmission fluid – Cracks or warping allow dirt and moisture ingress, resulting in dark, gritty oil and accelerated wear on bearings and planetary gears.
- Abnormal noise from the output area – Loose or misaligned cover creates vibration and whining sounds, particularly when the 0636011038: HEXAGON SCREW fasteners lose torque.
Technical Specifications
| Part Number | 4616.301.306 |
| Material | High-grade aluminum alloy (die-cast) |
| Weight | 2.8 kg (6.2 lbs) |
| Outer Diameter | 245 mm |
| Bolt Hole Pattern | 8 x M12 on 200 mm PCD |
| Surface Finish | Anodized, corrosion-resistant |
| OEM Reference | ZF 4616.301.306 |
Compatibility
This housing cover is designed for the ZF WG 65 Series transmissions, including models such as WG65, WG80, WG120, WG180, and WG200. It is a direct replacement for OEM units in off-highway trucks, wheel loaders, and heavy-duty material handling equipment. Always verify the transmission serial number before installation. For complete assembly, pair this cover with the 0636016015: HEXAGON SCREW and 0631306085: CYLINDRICAL PIN for precise alignment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616105413 | OUTPUT | Transfers torque from transmission to driveline |
| 4616203017 | OUTPUT FLANGE | Connects output shaft to universal joint |
| 4616101117 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 0636011038 | HEXAGON SCREW | Secures housing cover to transmission body |
| 0636016015 | HEXAGON SCREW | Additional fastening for cover flange |
| 0631306085 | CYLINDRICAL PIN | Ensures precise alignment during assembly |
| 0634313118 | O-RING | Seals oil passages between cover and housing |
| 0732611049 | FILTER INSERT | Traps debris in hydraulic circuit |
| 0634303718 | O-RING | Secondary seal for output shaft area |
| 0636610082 | STUD | Threaded rod for mounting accessories |
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