Overview
The ZF 4646.251.052 DISC CARRIER is a critical internal component engineered for the WG250 series powershift transmission. This genuine OEM part functions as the central hub that houses and positions the clutch disc packs, ensuring precise torque transfer and smooth gear engagement under heavy-duty operating conditions. Located within the main gear train assembly, the disc carrier interfaces directly with the 4646101028: TRANSMISSION HOUSING and the 4646301095: HOUSING to maintain correct axial alignment. The SKU 4646.251.052 is manufactured to ZF’s original specifications, guaranteeing dimensional accuracy and metallurgical integrity for long service life in construction, mining, and agricultural machinery.
Symptoms of Failure
When the ZF 4646.251.052 disc carrier begins to wear, operators typically notice these specific failure indicators:
- Erratic gear engagement or clutch slip under load – Worn splines or carrier bore distortion prevent the disc pack from clamping evenly, causing power loss during acceleration or uphill operation.
- Metallic grinding noises from the transmission housing – A loose or cracked disc carrier allows the clutch discs to contact the 4646301087: COVER or housing walls, producing audible scraping sounds.
- Contaminated transmission oil with metallic debris – Fatigue fractures in the carrier material shed fine steel particles into the lubrication system, often visible during oil changes.
- Intermittent loss of forward or reverse drive – Severe carrier wear shifts the clutch pack out of its intended stroke range, preventing full pressure plate travel.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4646.251.052 |
| OEM Reference | ZF WG250 Series |
| Material | High-tensile alloy steel, induction-hardened |
| Outer Diameter | Approx. 180 mm |
| Inner Spline Diameter | Approx. 65 mm |
| Overall Height | Approx. 95 mm |
| Weight | 2.8 kg (6.2 lbs) |
| Surface Finish | Phosphate coated for corrosion resistance |
Compatibility
This disc carrier is specifically designed for the ZF WG250 series transmission family. Based on the part’s geometry and spline configuration, it is compatible with the following models: WG180, WG200, WG250, and WG310. The carrier also integrates with the 0636015304: HEXAGON SCREW for secure mounting to the clutch drum assembly. Always verify your transmission serial number before ordering to ensure correct fitment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4646101028 | TRANSMISSION HOUSING | Main structural casing enclosing the gear train |
| 4646301095 | HOUSING | Intermediate support housing for clutch assembly |
| 4646301087 | COVER | Sealing cover protecting internal clutch components |
| 0636015304 | HEXAGON SCREW | Fastener for securing disc carrier to drum |
| 0636101828 | CAP SCREW | High-strength bolt for housing attachment |
| 4646301102 | COVER SHEET | Thin protective plate over clutch access port |
| 4646301098 | COVER SHEET | Secondary cover sheet for oil baffle |
| 0730365125 | TYPE PLATE | Identification plate with transmission serial number |
| 0631311009 | GROOVED STUD | Alignment stud for precise housing positioning |
| 0636101193 | CAP SCREW | Fastener for cover sheet retention |
