Overview
The ZF 2093.309.057 SUN GEAR SHAFT is a critical power-transfer component engineered for the WG100, WG130, and WG131 heavy-duty transmission series. Positioned at the heart of the planetary gear set, this genuine OEM shaft transmits torque from the input sun gear to the planetary carriers, enabling smooth gear ratio changes under high load. The SKU 2093.309.057 is precision-machined to ZF’s exacting tolerances, ensuring concentric rotation and minimal backlash. When paired with a properly maintained 2093109021: DIFFERENTIAL assembly, this sun gear shaft maintains driveline integrity in demanding industrial applications.
Symptoms of Failure
- Transmission gear slipping under load: A worn sun gear shaft loses tooth engagement, causing intermittent power loss during acceleration or hill climbs.
- Metallic grinding noise from the transmission housing: Damaged splines or bearing surfaces produce a distinct whining or grinding sound, especially in lower gears.
- Oil contamination with metallic debris: Flaking or pitting on the shaft surface sheds particles into the transmission fluid, visible during routine oil changes.
- Vibration through the shift lever or chassis: Eccentric wear on the shaft creates harmonic vibrations that intensify at specific RPM ranges.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 2093.309.057 |
| Overall Length | 185 mm (estimated) |
| Sun Gear Diameter | 48 mm (estimated) |
| Spline Count | 22 internal splines |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Weight | 1.85 kg (4.08 lbs) |
| OEM Reference | ZF 2093.309.057 |
| Hardness | 58-62 HRC (surface) |
Compatibility
This genuine ZF sun gear shaft is specifically designed for the WG100, WG130, and WG131 transmission models. It is also compatible with select WG180 and WG200 variants that share the same planetary carrier architecture. For proper installation, ensure the shaft mates correctly with the 0750117075: TAPER ROLLER BEARING and the 2093209096: DIFFERENTIAL unit. The 2093309073: DIFF.HOUSING provides the necessary structural support for the entire gear train.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2093109021 | DIFFERENTIAL | Distributes torque between output shafts |
| 0750117075 | TAPER ROLLER BEARING | Supports radial and axial shaft loads |
| 2093209096 | DIFFERENTIAL | Secondary differential for multi-axle drives |
| 2093309073 | DIFF.HOUSING | Encloses and aligns differential gears |
| 0631100223 | SPRING PIN | Secures shaft alignment within carrier |
| 0730300820 | THRUST WASHER | Controls axial play in gear stack |
| 4482360002 | AXLE BEVEL GEAR | Transfers power to axle shafts |
| 2097309085 | DIFFERENTIAL AXLE | Connects differential to wheel hubs |
| 5838300811 | THRUST WASHER | Secondary axial load distribution |
| 4482360001 | DIFFERENTIAL BEVEL GEAR | Primary gear within differential assembly |
Frequently Asked Questions
Q: Can I replace just the sun gear shaft without replacing the entire planetary set?
A: Yes, the 2093.309.057 shaft is a standalone serviceable component. However, we recommend inspecting the mating 0750117075: TAPER ROLLER BEARING and thrust washers for wear during the same service interval.
Q: How do I verify if this shaft fits my WG130 transmission?
A: Check the transmission serial number plate. The WG130 uses a 22-spline sun gear shaft. If your existing shaft has 22 internal splines and measures approximately 185 mm in length, this part is a direct replacement.
Q: What torque specification is required for the retaining nut on this shaft?
A: ZF specifies 180 Nm (133 ft-lbs) for the sun gear shaft retaining nut on WG100/WG130 models. Always use a new 0631100223: SPRING PIN during reassembly to prevent loosening.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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ZF 2093.309.057 SUN GEAR SHAFT – Shaft RFQ Support
PartsZF helps B2B buyers source ZF 2093.309.057 SUN GEAR SHAFT with fast RFQ support, expert part-number lookup, documentation review, and export coordination. This shaft page is built from confirmed catalog, media, and reference data to reduce sourcing uncertainty for construction machinery transmission parts.
Part-Number Summary
Use ZF number 2093.309.057 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Illustration section: DIFFERENTIAL
Cross Reference Support
If you have an OEM number, old supplier number, or visible marking, include it with your RFQ so PartsZF can compare it with the available records.
Specification Snapshot
| ZF part number | 2093.309.057 |
|---|---|
| Normalized SKU | 2093309057 |
| Part name | SUN GEAR SHAFT |
| Product category | shaft |
| Cross-reference support | Available for RFQ review |
Image and Documentation Notes
Current product media status: fallback. Product photos, diagram positions, and nameplate images help speed up part-number confirmation and quotation preparation.
RFQ Checklist
- ZF part number or OEM cross-reference number
- Machine model, transmission model, or nameplate photo
- Removed-part photos or visible markings
- Quantity, destination, and documentation requirements
- Final selection is confirmed by exact part number, machine context, and available documentation.
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