Overview
The ZF 4660.306.217 COVER is a critical sealing and protective component engineered specifically for the WG 92 and WG 98 transmission series. This OEM genuine part sits on the rear or side housing of the transmission assembly, serving as a barrier against contamination and fluid loss while maintaining internal pressure integrity. The SKU 4660.306.217 is precision-machined to interface directly with the TRANSMISSION HOUSING, ensuring a secure fit that prevents debris ingress and supports optimal lubrication flow. As a factory-spec replacement, this cover is essential for maintaining the structural rigidity of the gear train enclosure in heavy-duty industrial applications.
Symptoms of Failure
- External oil seepage around the cover perimeter: A worn or warped 4660.306.217 cover often leads to visible fluid leaks, particularly after thermal cycling, which can be identified by wet spots or drips beneath the transmission.
- Contaminated transmission fluid: When the cover loses its seal, dirt and moisture enter the system, causing premature wear on internal components like the PERIPHERALS and leading to gritty or discolored oil.
- Abnormal gear engagement noise: A compromised cover can allow slight housing flex, resulting in misalignment that produces whining or clattering sounds during shifts, especially under load.
- Intermittent pressure loss: Cracks or deformation in the cover may cause erratic hydraulic pressure, leading to delayed or harsh shifting in the WG 200 series units.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4660.306.217 |
| Material | Die-cast aluminum alloy (A380) |
| Weight | 1.85 kg (4.08 lbs) |
| Overall Dimensions | 280 mm x 180 mm x 45 mm |
| Bolt Hole Pattern | 8 x M10 on 220 mm PCD |
| Surface Finish | Anodized, corrosion-resistant |
| OEM Reference | ZF 4660.306.217 |
| Sealing Gasket | Integrated O-ring groove |
Compatibility
This cover is designed for direct fitment on ZF WG 92, WG 98, and WG 200 series transmissions. It is commonly found in off-highway vehicles, construction equipment, and agricultural machinery where the RANGE SELECTOR assembly interfaces with the main housing. The 4660.306.217 also pairs with the HOUSING unit in later WG 200 variants. For complete assembly, ensure the mating surfaces are clean and use the specified torque sequence to avoid distortion.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4660198001 | PERIPHERALS | Controls auxiliary power take-off and pump drive |
| 0501209818 | RANGE SELECTOR | Manages high/low range gear engagement |
| 4660101011 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4660301018 | HOUSING | Secondary housing for clutch pack assembly |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for cover positioning |
| 0769123894 | TYPE PLATE | Identification tag with serial number |
| 4660221012 | SUCTION TUBE | Oil intake conduit from sump to pump |
| 0634100317 | O-RING | Static seal for cover joint |
| 0636103273 | CAP SCREW | Fastener for cover attachment |
| 0750100022 | SCREW PLUG | Drain or fill port closure |
