Overview
The ZF 0501.221.524 LINED CLUTCH DISK is a critical friction component engineered for the WG100, WG130, and WG131 transmission series. This OEM genuine part sits within the clutch pack assembly, where it transmits torque from the engine to the gearbox by engaging and disengaging the drive under hydraulic pressure. The lined surface provides the necessary coefficient of friction for smooth, reliable power transfer during gear shifts. As a wear item, the SKU 0501.221.524 must be replaced at scheduled intervals to maintain transmission integrity. When rebuilding the clutch pack, it is common to inspect and replace the 5838109009: DIFFERENTIAL and the 0750117075: TAPER ROLLER BEARING to ensure all rotating elements are within tolerance.
Symptoms of Failure
- Transmission gear slipping under load: When the lined clutch disk wears thin, the hydraulic clamp force cannot hold the plates together, causing the engine to rev without proportional vehicle acceleration.
- Delayed or harsh engagement: A worn 0501.221.524 disk results in erratic shift timing, often producing a noticeable jolt when moving from neutral to drive or between forward gears.
- Burning smell from transmission fluid: Excessive friction from a glazed or worn lining generates heat, leading to a distinct burnt odor and potential fluid degradation.
- Increased operating noise or vibration: As the friction material disintegrates, debris can contaminate the hydraulic circuit, causing chatter or whining sounds during operation.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0501.221.524 |
| Type | Lined Clutch Disk (Friction Plate) |
| Outer Diameter | ~180 mm |
| Inner Diameter | ~120 mm |
| Thickness (New) | ~3.5 mm |
| Material | Steel core with organic friction lining |
| Weight | ~0.45 kg |
| OEM Reference | ZF 0501.221.524 |
| Application | WG100 / WG130 / WG131 |
Compatibility
This lined clutch disk is specifically designed for ZF WG-series powershift transmissions. It is a direct fit for the WG100, WG130, and WG131 models. While primarily intended for these three series, the 0501.221.524 may also be compatible with certain variants of the WG180 and WG200 when used in identical clutch pack configurations. Always verify spline count and stack height against your transmission’s service manual. During a full overhaul, technicians often replace the 2093209023: DIFFERENTIAL and the 5838300626: DIFFERENTIAL HOUSING to address any wear in the final drive assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109009 | DIFFERENTIAL | Distributes torque between drive wheels |
| 0750117075 | TAPER ROLLER BEARING | Supports axial and radial loads on shafts |
| 2093209023 | DIFFERENTIAL | Alternative differential assembly for WG series |
| 5838300626 | DIFFERENTIAL HOUSING | Encloses and supports differential gears |
| 0631329088 | SPRING PIN | Secures clutch pack alignment |
| 5838300811 | THRUST WASHER | Reduces axial friction between rotating parts |
| 5838300721 | AXLE BEVEL GEAR | Transfers power within differential |
| 5838300633 | AXLE | Connects differential to wheel hubs |
| 5838300753 | THRUST WASHER | Controls end-play in gear sets |
| 5838300818 | THRUST WASHER | Additional axial clearance management |
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