Overview
The ZF 4644.306.210 COVER is a critical sealing component engineered for the WG 180 and WG 200 series transmissions. This OEM genuine part, identified by SKU 4644.306.210, serves as the primary closure for the transmission housing assembly, preventing fluid contamination and maintaining internal pressure integrity. Positioned at the rear of the gearbox, this cover interfaces directly with the 4644105413: DISCONNECTION mechanism and the 4642303093: OUTPUT FLANGE, ensuring a sealed environment for the rotating components. Manufactured to ZF’s exacting tolerances, this cover is essential for long-term reliability in heavy-duty industrial applications.
Symptoms of Failure
When the ZF 4644.306.210 COVER begins to wear or crack, operators will notice distinct performance issues. Look for these specific failure indicators:
- Oil seepage at the rear bell housing – A common sign of a compromised cover seal, often mistaken for a main shaft leak.
- Gear engagement hesitation – Internal pressure loss from a damaged cover can cause delayed clutch pack engagement in WG 180 models.
- Contaminated transmission fluid – Cracks in the cover allow dirt and moisture ingress, leading to premature wear of the 4644101222: TRANSMISSION HOUSING.
- Vibration during load shifts – A loose or warped cover can misalign the output flange, creating driveline shudder under torque.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4644.306.210 |
| Material | Die-cast aluminum alloy (A356-T6) |
| Outer Diameter | 210 mm |
| Bolt Hole Pattern | 8 x M10 on 180 mm PCD |
| Weight | 1.45 kg (3.2 lbs) |
| OEM Reference | ZF 4644.306.210 |
| Surface Finish | Black anodized |
| Sealing Gasket | Integrated O-ring groove (compatible with 0634306525: O-RING) |
Compatibility
This cover is specifically designed for the ZF WG 180 and WG 200 series transmissions, commonly found in forklifts, telehandlers, and industrial loaders. It is a direct replacement for the following models:
- ZF WG 180 (all sub-variants including WG 180/II)
- ZF WG 200 (standard and high-torque versions)
- ZF WG 100 Series (limited compatibility; verify bolt pattern)
Installation requires the 0636021010: HEXAGON SCREW kit for proper torque retention. Always replace the mating gasket and inspect the 4642303093: OUTPUT FLANGE for wear during service.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644105413 | DISCONNECTION | Clutch release mechanism for gear disengagement |
| 4642303093 | OUTPUT FLANGE | Driveshaft coupling point |
| 0636021010 | HEXAGON SCREW | Fastener for cover mounting |
| 4644101222 | TRANSMISSION HOUSING | Main gearbox casing |
| 4644301226 | TRANSMISSION HOUSING | Alternate housing variant |
| 0730365067 | TYPE PLATE | Identification tag for transmission model |
| 0631311009 | GROOVED STUD | Alignment pin for cover positioning |
| 4644301298 | COVER PLATE | Secondary access cover |
| 0634306525 | O-RING | Sealing ring for fluid retention |
| 0636305026 | SCREW PLUG | Drain/fill port plug |
