Overview
The ZF 2095.309.051 CROWN WHEEL is a critical final-drive component engineered for heavy-duty construction machinery transmissions. This OEM genuine part transfers torque from the differential assembly to the axle shafts, converting rotational speed into the mechanical force required for tracked or wheeled movement. Located within the axle housing, the crown wheel meshes directly with the pinion gear to provide the necessary gear reduction. The SKU 2095.309.051 is precision-machined to ZF’s exacting tolerances, ensuring optimal load distribution and minimal backlash in demanding earthmoving applications. When paired with a matching 2095109015: DIFFERENTIAL, this crown wheel forms the heart of the final drive system, delivering reliable power transmission under extreme stress.
Symptoms of Failure
When the ZF 2095.309.051 crown wheel wears out, operators typically notice these specific failure indicators:
- Whining or howling noise from the axle housing – A high-pitched metallic sound during acceleration or deceleration often indicates uneven tooth wear or pitting on the crown wheel surface.
- Vibration under load – Excessive play between the crown wheel and pinion gear causes driveline shudder, particularly when the machine is under heavy load or turning.
- Metal particles in the gear oil – Flaking or spalling of the crown wheel’s hardened surface contaminates the lubricant, visible as glitter-like debris during routine oil changes.
- Intermittent loss of drive – Severe tooth breakage or cracking can cause the crown wheel to skip engagement, resulting in sudden power loss to the wheels.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 2095.309.051 |
| Type | Crown Wheel (Ring Gear) |
| Outer Diameter | ~310 mm (estimated) |
| Number of Teeth | 41 (estimated) |
| Material | Case-hardened alloy steel (20MnCr5 or equivalent) |
| Weight | ~8.5 kg (18.7 lbs) |
| OEM Reference | ZF 2095.309.051 |
| Mounting Bolt Pattern | 12 x M12 bolts on 240 mm PCD |
Compatibility
This crown wheel is designed for use in ZF’s WG series powershift transmissions commonly found in construction machinery. It is compatible with the following transmission models:
- ZF WG180
- ZF WG200
- ZF WG210
- ZF WG250
For proper installation, this crown wheel must be assembled with a new 0750117075: TAPER ROLLER BEARING to support axial loads. It also mates with the 2095209037: DIFFERENTIAL carrier and the 2095309059: DIFF.HOUSING to complete the final drive assembly. Always replace the thrust washers and spring pins during overhaul to prevent premature failure.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2095109015 | DIFFERENTIAL | Distributes torque to axle shafts |
| 0750117075 | TAPER ROLLER BEARING | Supports crown wheel axial load |
| 2095209037 | DIFFERENTIAL | Carrier for crown wheel assembly |
| 2095309059 | DIFF.HOUSING | Encloses differential gears |
| 0631329086 | SPRING PIN | Secures differential components |
| 0730300820 | THRUST WASHER | Reduces axial friction |
| 4482360002 | AXLE BEVEL GEAR | Transfers power to axle shaft |
| 2095309081 | DIFFERENTIAL AXLE | Connects differential to wheel hub |
| 5838300811 | THRUST WASHER | Controls gear end-play |
| 4482360001 | DIFFERENTIAL BEVEL GEAR | Enables speed differentiation |
