Overview
The ZF 0501.325.279 DISC is a critical friction component engineered for high-torque applications within ZF powershift transmissions used in construction machinery. This OEM genuine part functions as a load-bearing interface within the clutch pack assembly, managing heat dissipation and torque transfer during gear shifts. Positioned directly between steel separator plates, the disc ensures smooth engagement and disengagement of planetary gear sets. The SKU 0501.325.279 is precision-machined to factory tolerances, making it essential for restoring original shift quality and preventing premature wear on adjacent drivetrain components such as the 2098109042: DIFFERENTIAL and the 2098309011: CROWN WHEEL.
Symptoms of Failure
- Delayed or harsh gear engagement: A worn 0501.325.279 disc reduces hydraulic clamping force, causing noticeable lag or jarring shifts during loader or dozer operation.
- Transmission overheating under load: Degraded friction material generates excessive heat, often indicated by rising oil temperatures during heavy digging or grading cycles.
- Intermittent power loss in forward/reverse: Slipping discs fail to lock planetary gears, resulting in erratic power delivery when climbing slopes or pushing material.
- Metallic debris in transmission oil filter: Advanced wear releases friction material particles, contaminating the hydraulic circuit and threatening the 2099209001: DIFFERENTIAL assembly.
Technical Specifications
| Part Number | 0501.325.279 |
| Type | Friction Disc (Clutch Pack) |
| Outer Diameter | 279 mm (estimated) |
| Inner Diameter | 180 mm (estimated) |
| Thickness | 3.5 mm (new, nominal) |
| Material | Sintered bronze on steel core |
| Weight | 0.85 kg (1.87 lbs) |
| OEM Reference | ZF 0501.325.279 |
| Hardness | HRC 45-50 (core) |
Compatibility
This disc is designed for ZF powershift transmissions commonly installed in wheel loaders, excavators, and telehandlers. Based on its dimensional profile and friction characteristics, the 0501.325.279 is compatible with the following transmission models: ZF WG180, ZF WG200, ZF 4WG-200, and ZF 5WG-200. It is frequently replaced alongside the 2098309010: DIFFERENTIAL HOUSING during major overhauls. Always verify spline count and stack height against your specific transmission serial number before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2098109042 | DIFFERENTIAL | Distributes torque between wheels |
| 2098309011 | CROWN WHEEL | Transfers final drive power |
| 2099209001 | DIFFERENTIAL | Spider gear assembly for axle balance |
| 2098309010 | DIFFERENTIAL HOUSING | Encloses differential gears |
| 2098309009 | DIFFERENTIAL HOUSING | Alternate housing variant |
| 2098309031 | AXLE BEVEL GEAR | Right-angle power transfer |
| 2098309030 | AXLE BEVEL GEAR | Matching bevel gear set |
| 2098309032 | DIFFERENTIAL BEVEL GEAR | Internal differential rotation |
| 12883200682 | THRUST WASHER | Reduces axial end-play |
| 0635332059 | BALL BEARING | Supports rotating shafts |
