Overview
The ZF 4646.298.909 DISC CARRIER is a critical internal component engineered specifically for the WG 260, WG 261, and WG 311 series transmissions. This genuine OEM part functions as the primary hub that houses and positions the clutch disc packs within the planetary gear set. By maintaining precise alignment and axial load distribution, the disc carrier ensures smooth torque transfer during gear shifts. The SKU 4646.298.909 is machined from high-strength alloy steel to withstand the extreme rotational forces and thermal cycling found in heavy-duty industrial applications. When installed alongside a robust TRANSMISSION HOUSING, this carrier provides the structural foundation necessary for reliable power transmission in off-highway vehicles and construction equipment.
Symptoms of Failure
- Delayed or harsh gear engagement: A worn disc carrier can cause uneven clutch pack pressure, leading to noticeable hesitation or jerking when shifting from neutral to drive.
- Metallic grinding noises from the transmission: As the carrier’s splines or bearing surfaces degrade, you may hear a distinct grinding or whining sound during acceleration, particularly in lower gears.
- Transmission fluid contamination with metal particles: Excessive wear on the disc carrier generates fine metallic debris in the oil, often visible during routine fluid changes or filter inspections.
- Intermittent power loss under load: A failing carrier can allow clutch discs to slip, resulting in a temporary loss of torque delivery when climbing grades or hauling heavy loads.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (SKU) | 4646.298.909 |
| Material | High-strength alloy steel (heat-treated) |
| Outer Diameter | Approx. 180 mm |
| Inner Diameter | Approx. 95 mm |
| Overall Height | Approx. 65 mm |
| Weight | 2.8 kg (6.2 lbs) |
| OEM Reference | ZF 4646.298.909 |
| Surface Finish | Ground and phosphate-coated |
Compatibility
This genuine ZF disc carrier is designed for use in the WG 260, WG 261, and WG 311 transmission series. It also fits select models in the WG 180, WG 200, and WG 250 series where the clutch pack configuration matches. For proper installation, always pair this carrier with a new COVER and secure it using the specified 螺栓 and 螺栓 fasteners to maintain correct clamping force and prevent oil leaks.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4646101173 | TRANSMISSION HOUSING | Encloses and supports all internal transmission components |
| 4646301349 | COVER | Seals the transmission housing and provides access for maintenance |
| 0636115293 | 螺栓 | Fastens the cover and housing assembly |
| 0736300232 | 螺栓 | Secures the disc carrier to the clutch drum |
| 4475280208 | SCREW PLUG | Seals oil passages and inspection ports |
| 0634316523 | O-RING | Prevents fluid leaks between mating surfaces |
| 0630361026 | SEALING CAP | Protects open ports from contamination |
| 0501214611 | 齿轮泵 | Provides hydraulic pressure for clutch actuation |
| 0634313945 | O形圈 | Seals the pump housing to prevent oil bypass |
| 0501322532 | TEMPERATURE SENSOR | Monitors transmission fluid temperature for thermal protection |
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