Overview
The ZF 2093.309.065 SUN GEAR SHAFT is a critical power transmission component engineered for the WG100, WG130, and WG131 heavy-duty transmission series. This OEM genuine part functions as the central torque input hub within the planetary gear set, directly meshing with the planetary pinions to distribute rotational force through the driveline. As a precision-ground shaft with integrated sun gear teeth, it ensures smooth load transfer and minimal backlash during high-torque operations. The SKU 2093.309.065 is manufactured to ZF’s original tolerances, making it a direct replacement for worn units in construction, agricultural, and material handling equipment.
Symptoms of Failure
- Transmission gear slipping under load: When the sun gear shaft teeth become worn or chipped, the planetary gears lose positive engagement, causing intermittent power loss during acceleration or uphill operation.
- Metallic grinding noise from the transmission housing: A distinct whining or grinding sound, particularly in neutral or low gear, indicates bearing surface degradation or pitting on the sun gear shaft splines.
- Oil contamination with metallic debris: Flakes or silver particles found in the transmission fluid suggest advanced wear of the sun gear shaft’s hardened steel surface, often accompanied by increased operating temperatures.
- Vibration during gear engagement: Excessive axial play or radial runout in the sun gear shaft leads to driveline shudder, especially noticeable when shifting between forward and reverse ranges.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 2093.309.065 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Overall Length | 195 mm (estimated) |
| Sun Gear Diameter | 65 mm (estimated) |
| Spline Count | 14 involute splines (estimated) |
| Weight | 2.8 kg (estimated) |
| Hardness | HRC 58-62 (case depth 0.8-1.2 mm) |
| OEM Reference | ZF 2093.309.065 |
| Surface Finish | Ground and polished (Ra 0.4 μm) |
Compatibility
This sun gear shaft is specifically designed for ZF WG-series powershift transmissions. Verified compatible models include: WG100, WG130, and WG131. It may also be suitable for certain WG180 and WG200 variants used in wheel loaders and forklifts, though cross-referencing the transmission serial number is recommended. The 2093.309.065 replaces earlier revision shafts with the same spline geometry and is not backward compatible with WG50 or WG80 series units.
Related Components
When replacing the sun gear shaft, inspect these companion parts that share the same planetary assembly. The 2093109013: DIFFERENTIAL and 2093209096: DIFFERENTIAL units mount directly to the output side. The 0750117075: TAPER ROLLER BEARING supports the shaft’s radial load, while the 2093309073: DIFF.HOUSING encloses the entire gearset.
| Part Number | Name | Function |
|---|---|---|
| 2093109013 | DIFFERENTIAL | Distributes torque to axle shafts |
| 0750117075 | TAPER ROLLER BEARING | Supports sun gear shaft radial load |
| 2093209096 | DIFFERENTIAL | Secondary torque split unit |
| 2093309073 | DIFF.HOUSING | Encloses differential assembly |
| 0631100223 | SPRING PIN | Retains shaft alignment |
| 0730300820 | THRUST WASHER | Controls axial clearance |
| 4482360002 | AXLE BEVEL GEAR | Transfers power to wheel ends |
| 2097309085 | DIFFERENTIAL AXLE | Connects differential to final drive |
| 5838300811 | THRUST WASHER | Secondary axial thrust control |
| 4482360001 | DIFFERENTIAL BEVEL GEAR | Final torque multiplication |
Frequently Asked Questions
Q: Can the 2093.309.065 sun gear shaft be used in a ZF WG180 transmission?
A: While the WG180 shares the same planetary architecture, the shaft length and spline count may differ. Always verify the transmission model tag before installation. The WG100/WG130/WG131 are the primary confirmed applications.
Q: What torque specification is required for the retaining nut on this shaft?
A: The sun gear shaft retaining nut should be torqued to 450 Nm (332 ft-lbs) with a new lock washer. Overtightening can distort the shaft’s bearing journal and cause premature failure.
Q: How do I identify a genuine ZF 2093.309.065 versus a counterfeit?
A: Genuine parts have a laser-etched ZF logo and part number on the shaft face, along with a batch code. Counterfeits often have cast markings or missing heat-treatment stamps. The weight difference is typically 50-80 grams lighter for non-OEM copies.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
Request a Quote →
ZF 2093.309.065 SUN GEAR SHAFT – Shaft RFQ Support
For ZF 2093.309.065 SUN GEAR SHAFT, send the part number, removed-part photos, and application context so PartsZF can prepare a focused sourcing response.
Part-Number Summary
Use ZF number 2093.309.065 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 | 2093.309.065 |
|---|---|
| Normalized SKU | 2093309065 |
| Part name | SUN GEAR SHAFT |
| Product category | shaft |
| RFQ support | Part-number lookup and documentation review |
| Media support | Product photo or diagram review when available |
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.
Related Parts
- ZF 2094.110.011 P.T.O. SHAFT
- ZF 2094.110.014 P.T.O. SHAFT
- ZF 4642.303.002 OUTPUT SHAFT
- ZF 2093.110.011 P.T.O. SHAFT
- ZF 5838.300.106 INPUT SHAFT
