Overview
The ZF 0732.000.249 CUP SPRING is a precision-engineered component designed for the WG92 and WG98 transmission series. This OEM genuine part functions as a critical load-bearing element within the clutch pack assembly, providing consistent axial force to maintain proper gear engagement and hydraulic pressure. Located inside the transmission drum, the cup spring absorbs operational vibrations and compensates for thermal expansion during heavy-duty cycles. The SKU 0732.000.249 is manufactured to exact ZF tolerances, ensuring seamless integration with the 4660101015: TRANSMISSION HOUSING and the 4660301054: HOUSING II to prevent premature wear in high-torque applications.
Symptoms of Failure
When the 0732.000.249 cup spring deteriorates, operators often notice specific performance issues. Delayed gear engagement during cold starts is a common indicator, as the spring loses its ability to preload the clutch pack. Intermittent gear slipping under load occurs when the spring cannot maintain adequate clamping force, particularly in WG98 transmissions. Hydraulic fluid contamination from metal fatigue particles may appear in the oil pan, signaling spring fracture. Audible clicking or rattling from the transmission housing during deceleration suggests the spring has lost its temper and is no longer seated properly against the 0631306174: CYLINDRICAL PIN.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 0732.000.249 |
| Material | Spring steel (DIN 17221) |
| Outer Diameter | 89.5 mm |
| Inner Diameter | 62.0 mm |
| Thickness | 3.2 mm |
| Free Height | 12.8 mm |
| Weight | 0.085 kg |
| Surface Treatment | Phosphate coated |
| OEM Reference | ZF 0732.000.249 |
Compatibility
This cup spring is engineered for ZF WG series transmissions, specifically the WG92 and WG98 models used in off-highway and industrial vehicles. It is also compatible with WG180 and WG200 variants where the clutch pack geometry matches the 89.5 mm outer diameter. The part interfaces directly with the 0769123894: TYPE PLATE for correct orientation during assembly. For WG92 rebuilds, verify that the spring pocket depth in the TRANSMISSION HOUSING aligns with the free height specification. This spring is not suitable for WG120 or WG250 series without adapter modifications.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4660101015 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4660301054 | HOUSING II | Secondary housing for clutch pack support |
| 0631306174 | CYLINDRICAL PIN | Alignment pin for spring positioning |
| 0769123894 | TYPE PLATE | Identification plate for transmission model |
| 0750100022 | SCREW PLUG | Seals hydraulic passages |
| 4660221029 | SUCTION TUBE | Oil intake conduit for pump |
| 0634100317 | O-RING | Seals housing joints |
| 0636103273 | CAP SCREW | Fastener for housing cover |
| 0634306311 | O-RING | Seals suction tube connection |
| 4660321029 | FIXING PLATE | Retains spring assembly in position |
