Overview
The ZF 2074.311.059 SUN GEAR is a critical planetary gearset component engineered for the WG100, WG130, and WG131 transmission series. This OEM genuine part, identified by SKU 2074.311.059, sits at the center of the planetary carrier assembly, directly meshing with multiple planet gears to distribute torque efficiently. As a hardened steel sun gear, it serves as the primary input or reaction member within the planetary system, converting hydraulic motor power into mechanical rotation. When paired with a robust TRANSMISSION HOUSING, this component ensures precise gear alignment and minimal power loss during heavy-duty industrial operations.
Symptoms of Failure
- Erratic gear slipping under load: A worn sun gear loses tooth profile integrity, causing intermittent engagement with planet gears, particularly during torque multiplication in WG130 transmissions.
- Metallic grinding noise from planetary section: Pitting or spalling on the sun gear’s teeth generates a distinct high-pitched whine or grinding sound, often misdiagnosed as bearing failure.
- Accumulation of ferrous debris in transmission fluid: As the sun gear degrades, microscopic metal particles contaminate the oil, leading to accelerated wear on adjacent components like the HOUSING and clutch packs.
- Reduced transmission efficiency and overheating: Increased friction from a damaged sun gear forces the system to work harder, raising operating temperatures and potentially warping the HOUSING assembly.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 2074.311.059 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Tooth Count | 24 teeth (estimated) |
| Outer Diameter | 82.5 mm |
| Inner Bore Diameter | 35.0 mm |
| Face Width | 28.0 mm |
| Weight | 0.85 kg |
| Surface Hardness | 58-62 HRC |
| OEM Reference | ZF 2074.311.059 |
Compatibility
This sun gear is specifically designed for ZF WG-series powershift transmissions used in construction and agricultural machinery. Verified compatible models include:
- ZF WG100 (all variants)
- ZF WG130 (including WG131)
- ZF WG180 (limited compatibility, verify spline count)
- ZF WG200 (requires confirmation of planetary carrier revision)
During installation, always inspect the mating COVER for wear patterns, as a failing sun gear often damages the surrounding housing surfaces.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2094101012 | TRANSMISSION HOUSING | Encloses planetary gearset and supports shaft alignment |
| 2094301036 | HOUSING | Intermediate housing for clutch and gear assembly |
| 2094298057 | HOUSING | Rear housing providing bearing support |
| 2094301071 | COVER | Seals the planetary carrier section |
| 0750111371 | SHAFT SEAL | Prevents fluid leakage at rotating shafts |
| 0634303085 | O-RING | Static seal between housing flanges |
| 2094301030 | GASKET | Compression seal for oil-tight joints |
| 0631306670 | CYLINDRICAL PIN | Aligns housing components during assembly |
| 0636011356 | HEXAGON SCREW | Fastens housing sections together |
| 4475280060 | SCREW PLUG | Seals hydraulic test ports |
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ZF 2074.311.059 SUN GEAR – Gear RFQ Support
PartsZF helps B2B buyers source ZF 2074.311.059 SUN GEAR with fast RFQ support, expert part-number lookup, documentation review, and export coordination. This gear 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 2074.311.059 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Illustration section: OUTPUT
- Illustration section: ABTRIEB
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 | 2074.311.059 |
|---|---|
| Normalized SKU | 2074311059 |
| Part name | SUN GEAR |
| Product category | gear |
| Cross-reference support | Available for RFQ review |
| Weight | 7.85 |
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 4646.302.128 HELICAL GEAR
- ZF 4143.316.088 PINION
- ZF 4657.302.007 INPUT GEAR
- ZF 4657.354.044 OUTPUT GEAR
- ZF 4644.306.326 GEAR SHIFT HOUSING
