Overview
The ZF 0501.208.632 CUP SPRING PACK is a critical load-bearing component engineered for precise clutch pack preload within the WG100, WG130, and WG131 transmission series. This OEM genuine part, identified by SKU 0501.208.632, sits directly inside the planetary gearset assembly where it maintains constant pressure on the clutch discs. By ensuring consistent spring force, this cup spring pack prevents premature clutch wear and maintains smooth gear engagement under high-torque conditions. When paired with a properly functioning DIFFERENTIAL HOUSING, the spring pack helps stabilize the entire rotating assembly.
Symptoms of Failure
- Erratic gear engagement or delayed shifting – When the cup spring pack loses its preload tension, the clutch pack fails to engage promptly, causing hesitation during acceleration.
- Low hydraulic pressure warnings – A collapsed or fatigued spring pack allows internal fluid bypass, triggering pressure drops in the valve body circuit.
- Metallic debris in transmission fluid – Worn spring pack fragments contaminate the oil, often accompanied by grinding noises from the planetary set.
- Torque converter shudder – Inconsistent spring force leads to clutch slip, producing vibration during lock-up that mimics converter failure.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0501.208.632 |
| Material | Spring steel (DIN 17222) |
| Outer Diameter | 82.5 mm |
| Inner Diameter | 45.0 mm |
| Thickness (free height) | 4.2 mm |
| Weight | 0.085 kg |
| OEM Reference | ZF 0501.208.632 |
| Surface Finish | Phosphate coated |
Compatibility
This cup spring pack is specifically designed for ZF WG100, WG130, and WG131 powershift transmissions commonly found in agricultural tractors and construction loaders. It also fits select WG180 and WG200 variants where the clutch pack stack height matches the 4.2 mm free height specification. Always verify the spring pack thickness against your existing assembly. For complete differential rebuilds, consider the DIFFERENTIAL (5838109012) and the TAPER ROLLER BEARING (0750117075) which support the same housing. The DIFFERENTIAL (2093209023) is another common companion part in these axle assemblies.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 0631329088 | SPRING PIN | Secures spring pack alignment |
| 5838300811 | THRUST WASHER | Reduces axial friction |
| 5838300721 | AXLE BEVEL GEAR | Transfers torque to axle |
| 5838300633 | AXLE | Drives wheel hub |
| 5838300753 | THRUST WASHER | Controls end play |
| 5838300818 | THRUST WASHER | Load distribution |
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