Overview
This genuine OEM ZF 2093.073.009 REAR AXLE is a critical load-bearing and torque-transmitting component within the final drive assembly of heavy construction machinery. It serves as the primary rotational interface between the differential case and the wheel hubs, ensuring precise power delivery under extreme loads. The SKU 2093.073.009 is engineered to exact factory tolerances, making it a direct replacement for worn units in ZF drivelines. When installed, this axle works in concert with the 2093109018: DIFFERENTIAL to distribute torque evenly across the drive wheels.
Symptoms of Failure
- Excessive end-play or wheel wobble: A worn rear axle allows lateral movement in the hub, causing uneven tire wear and unstable handling on uneven terrain.
- Oil seepage at the hub seal: Degraded axle journals compromise seal contact, leading to gear oil leaks that contaminate brake components and reduce lubrication efficiency.
- Metallic grinding noise during turns: Fatigue cracks or spline wear on the 2093.073.009 produce a distinct grinding sound when the differential is under load, indicating imminent failure.
- Vibration under acceleration: Bent or fatigued axles generate driveline shudder that worsens with speed, often misdiagnosed as a bearing issue.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 2093.073.009 |
| Material | High-alloy forged steel (induction hardened) |
| Overall Length | ~ 680 mm |
| Spline Count | 24 (internal) / 28 (external) |
| Weight | ~ 14.2 kg |
| OEM Reference | ZF 2093.073.009 |
| Surface Treatment | Black oxide / phosphate coating |
Compatibility
This rear axle is designed for use in ZF WG180, WG200, and WG310 series power-shift transmissions commonly found in wheel loaders, graders, and telehandlers. It is also compatible with certain ZF APL-300 and APL-400 final drive assemblies. For proper installation, ensure the 0750117075: TAPER ROLLER BEARING is replaced simultaneously to maintain correct preload. The axle interfaces directly with the 2093209023: DIFFERENTIAL and must be housed within a structurally sound 5838300626: DIFFERENTIAL HOUSING to prevent misalignment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2093109018 | DIFFERENTIAL | Distributes torque between left and right axles |
| 0750117075 | TAPER ROLLER BEARING | Supports axial and radial loads on the axle shaft |
| 2093209023 | DIFFERENTIAL | Alternate differential variant for high-torque applications |
| 5838300626 | DIFFERENTIAL HOUSING | Encloses and aligns the differential and axle assembly |
| 0631329088 | SPRING PIN | Secures axle retention components |
| 5838300811 | THRUST WASHER | Controls axial clearance in the differential |
| 5838300721 | AXLE BEVEL GEAR | Transfers power from ring gear to axle shaft |
| 5838300633 | AXLE | Alternative axle variant for specific ratios |
| 5838300753 | THRUST WASHER | Reduces friction between rotating gears |
| 5838300818 | THRUST WASHER | Prevents axial movement of side gears |
Frequently Asked Questions
Q: Can the 2093.073.009 rear axle be repaired if the splines are worn?
A: No. ZF axles are induction-hardened and cannot be reliably re-splined. Replacement with a genuine OEM unit is the only safe solution to avoid catastrophic driveline failure.
Q: Is this axle compatible with both WG180 and WG200 transmissions?
A: Yes. The 2093.073.009 is a shared component across these series, though you must verify the differential housing part number (5838300626) matches your specific assembly to ensure correct spline engagement.
Q: What torque specification should be used for the axle retaining nut?
A: ZF specifies 450 Nm ± 20 Nm for the axle nut on this part, but always consult your machine’s service manual as final drive configurations may vary.
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