Overview
The ZF 2094.027.021 T 7300 is a genuine OEM high-torque clutch drum assembly engineered for heavy-duty construction machinery transmissions. This critical rotating component sits within the planetary gear set of ZF’s powershift transmissions, where it transfers hydraulic clamping force to engage clutch packs during gear changes. As a wear-sensitive part, the SKU 2094.027.021 directly governs shift quality and torque capacity. Its failure often necessitates simultaneous replacement of the 2094101018: TRANSMISSION HOUSING to maintain concentric alignment, as both components share a common oil gallery interface.
Symptoms of Failure
- Delayed or harsh gear engagement: When the clutch drum’s sealing surfaces wear, hydraulic pressure drops, causing a 1-3 second lag when shifting from neutral to drive in wheel loaders.
- Transmission fluid contamination: Cracks in the drum’s hub allow clutch material to shed into the oil, visible as metallic glitter on the dipstick during routine checks.
- Intermittent slipping under load: The part’s spline wear creates audible clicking during hard acceleration on excavators, often misdiagnosed as axle failure.
- Oil leaks near the bell housing: Degraded O-ring grooves on the 2094.027.021 permit fluid migration past the 2094301069: HOUSING, leaving puddles under parked equipment.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 2094.027.021 |
| OEM Reference | T 7300 |
| Material | Forged alloy steel (30CrNiMo8), induction-hardened |
| Outer Diameter | 210 mm ±0.5 mm |
| Overall Length | 145 mm |
| Spline Count | 24 internal splines (SAE 15T) |
| Weight | 3.85 kg (8.5 lbs) |
| Sealing Grooves | 2x O-ring channels (compatible with 0634303085: O-RING) |
| Bolt Pattern | 6x M10 threaded holes (use 0636011356: HEXAGON SCREW) |
Compatibility
This genuine ZF 2094.027.021 clutch drum is validated for the following transmission families used in construction equipment: ZF WG180, ZF WG200, and ZF T 7300 series. It also fits select ZF 4WG-200 and ZF 6WG-250 variants manufactured between 2008-2020. The part interfaces directly with the 2094298054: HOUSING and requires the 2094301071: COVER for proper axial retention. Always verify your transmission’s serial number against ZF’s compatibility matrix before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2094101018 | TRANSMISSION HOUSING | Encloses planetary gearset and oil sump |
| 2094301069 | HOUSING | Supports clutch drum bearing journals |
| 2094298054 | HOUSING | Rear cover with PTO interface |
| 2094301071 | COVER | Seals clutch pack access port |
| 2094301030 | GASKET | Prevents oil seepage between mating surfaces |
| 0750111371 | SHAFT SEAL | Dynamic seal for rotating input shaft |
| 0634303085 | O-RING | Static seal for drum-to-housing joint |
| 0631306670 | CYLINDRICAL PIN | Aligns clutch drum to sun gear |
| 0636011356 | HEXAGON SCREW | Fastens drum to turbine hub |
| 4475280066 | SCREW PLUG | Seals hydraulic test port |
