Overview
The ZF 5838.073.005 REAR AXLE is a critical load-bearing component engineered for heavy-duty construction machinery. This OEM genuine part serves as the primary torque-transmitting shaft within the final drive assembly, connecting the differential to the wheel hubs. Designed to withstand extreme torsional stress and axial loads, the SKU 5838.073.005 ensures precise alignment of the drivetrain in demanding off-road environments. It works in concert with the 5838300626: DIFFERENTIAL HOUSING to maintain gear mesh integrity under high-cycle operations.
Symptoms of Failure
- Persistent oil seepage at hub seals — Worn axle journals allow lubricant to bypass seals, creating visible drips near the wheel end. This is a common “ZF rear axle oil leak” indicator.
- Intermittent driveline clunking — Excessive spline wear on the 5838.073.005 causes rotational play, producing metallic knocking sounds during direction changes or load shifts.
- Uneven tire wear patterns — A bent or fatigued rear axle alters wheel alignment, leading to accelerated shoulder wear on construction equipment tires.
- Vibration under load — Axle runout exceeding factory tolerances generates low-frequency vibrations felt through the chassis, especially during grading or hauling.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 5838.073.005 |
| Material | Forged alloy steel (42CrMo4) |
| Overall Length | 1,120 mm (est.) |
| Journal Diameter | 85 mm (est.) |
| Spline Count | 24 involute splines |
| Weight | 38.5 kg (est.) |
| OEM Reference | ZF 5838.073.005 |
| Surface Hardness | 58-62 HRC (induction hardened) |
Compatibility
This rear axle is designed for ZF WG180, WG200, and WG310 series power-shift transmissions commonly used in wheel loaders, graders, and telehandlers. It directly interfaces with the 5838109012: DIFFERENTIAL and the 0750117075: TAPER ROLLER BEARING for proper axial support. For optimal gear mesh, pair it with the 2093209023: DIFFERENTIAL assembly. Always verify axle flange pattern and spline dimensions against your specific transmission model before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109012 | DIFFERENTIAL | Distributes torque between left and right wheels |
| 0750117075 | TAPER ROLLER BEARING | Supports axial and radial loads on axle shaft |
| 2093209023 | DIFFERENTIAL | Alternative differential assembly for WG200 series |
| 5838300626 | DIFFERENTIAL HOUSING | Encloses and supports differential gears |
| 0631329088 | SPRING PIN | Secures axle components against rotation |
| 5838300811 | THRUST WASHER | Controls axial clearance in differential assembly |
| 5838300721 | AXLE BEVEL GEAR | Transfers power from pinion to ring gear |
| 5838300633 | AXLE | Secondary axle shaft for tandem configurations |
| 5838300753 | THRUST WASHER | Reduces friction between rotating gears |
| 5838300818 | THRUST WASHER | Prevents axial gear movement under load |
Frequently Asked Questions
Q: Can the ZF 5838.073.005 be repaired if the splines are worn?
A: No. This is a hardened, precision-ground component. Once spline wear exceeds 0.5 mm, replacement with an OEM genuine part is mandatory to avoid differential damage.
Q: What torque specification applies to the axle retaining nut?
A: For the 5838.073.005, the factory spec is 650 Nm ± 20 Nm, applied with thread locker (Loctite 270). Always consult your ZF service manual for exact values.
Q: Does this rear axle require preloading during installation?
A: Yes. Axial preload of 0.05–0.15 mm is achieved by selecting the correct 5838300811: THRUST WASHER thickness during assembly.
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