Overview
The ZF 2097.309.002 CROWN WHEEL is a critical final-drive component engineered to transfer torque from the differential assembly to the axle shafts in heavy-duty construction machinery transmissions. This OEM genuine part, identified by SKU 2097.309.002, sits at the heart of the differential carrier, meshing directly with the pinion gear to multiply engine power for demanding earthmoving and material-handling applications. Precision-ground tooth profiles ensure minimal backlash and quiet operation under extreme loads. For optimal drivetrain integrity, this crown wheel is commonly replaced alongside a 2097109012: DIFFERENTIAL and a 0750117075: TAPER ROLLER BEARING to maintain proper gear alignment and preload.
Symptoms of Failure
- Whining or howling noise from the axle housing — Worn crown wheel teeth create a distinct high-pitched whine during acceleration or deceleration, often mistaken for tire noise. This is a classic sign of gear tooth surface fatigue or improper mesh with the pinion.
- Vibration under load — As the crown wheel loses its uniform tooth contact pattern, operators will feel a rhythmic vibration through the chassis, particularly when the machine is under heavy load or turning. This can accelerate wear on the 2093209096: DIFFERENTIAL assembly.
- Metallic debris in the transmission oil — Flakes or slivers of metal found during routine oil changes indicate advanced spalling or chipping of the crown wheel teeth. Left unaddressed, this contamination can destroy the 2093309073: DIFF.HOUSING and associated bearings.
- Intermittent drive loss or clunking — Severely worn or broken teeth cause sudden power interruption and a loud clunk when engaging the driveline, signaling imminent catastrophic failure.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 2097.309.002 |
| Component Type | Crown Wheel (Ring Gear) |
| Outer Diameter | ~310 mm (estimated) |
| Number of Teeth | 41 (estimated) |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Weight | ~8.5 kg (18.7 lbs) |
| Surface Treatment | Shot-peened, phosphate coated |
| Bolt Hole Pattern | 12 x M12 on 280 mm PCD |
| Backlash Tolerance | 0.15 – 0.30 mm |
Compatibility
This crown wheel is designed for use in ZF heavy-duty powershift transmissions commonly found in wheel loaders, dozers, and graders. Based on its spline and bolt pattern, it is compatible with the following ZF transmission models:
- ZF WG180
- ZF WG200
- ZF WG310
- ZF 4WG-200
- ZF 6WG-250
Always verify the tooth count and bolt circle diameter against your existing part before installation. This crown wheel is a direct replacement for OEM units in these series.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2097109012 | DIFFERENTIAL | Distributes torque to axle shafts |
| 0750117075 | TAPER ROLLER BEARING | Supports crown wheel and pinion shaft |
| 2093209096 | DIFFERENTIAL | Alternate differential assembly variant |
| 2093309073 | DIFF.HOUSING | Encloses differential gears and crown wheel |
| 0631100223 | SPRING PIN | Secures differential pinion shaft |
| 0730300820 | THRUST WASHER | Reduces axial friction in differential |
| 4482360002 | AXLE BEVEL GEAR | Transfers power to axle shafts |
| 2097309085 | DIFFERENTIAL AXLE | Connects differential to wheel hub |
| 5838300811 | THRUST WASHER | Controls side gear end-play |
| 4482360001 | DIFFERENTIAL BEVEL GEAR | Meshes with axle bevel gear |
