Overview
The ZF 2093.303.091 HELICAL GEAR is a precision-engineered component designed for the auxiliary drive and power take-off (PTO) circuits within ZF WG100, WG130, and WG131 transmissions. This OEM genuine part transmits torque between parallel shafts, reducing noise and vibration through its angled tooth profile. As a critical element of the gear train, the 2093.303.091 ensures smooth engagement and consistent power delivery in heavy-duty industrial applications. The SKU 2093.303.091 is manufactured to exact ZF tolerances, guaranteeing a direct replacement without modification.
Symptoms of Failure
- Whining or howling noise during deceleration: Worn helical teeth create a distinct high-pitched sound, often mistaken for bearing failure, indicating the gear surface is pitted or chipped.
- Intermittent power loss under load: When the helical gear skips or slips, the transmission may momentarily lose drive, especially when climbing or hauling heavy loads.
- Metallic debris in transmission oil: Flakes or slivers of metal found during routine oil changes signal that the 2093.303.091 is shedding material, contaminating the entire lubrication system.
- Vibration through the gearshift lever: Excessive backlash from a worn helical gear transmits noticeable shuddering into the cab or operator station.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 2093.303.091 |
| Gear Type | Helical, single-cut |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Outside Diameter | ~112 mm |
| Bore Diameter | ~30 mm |
| Face Width | ~28 mm |
| Number of Teeth | 29 |
| Helix Angle | ~25° |
| Weight | ~0.85 kg |
| OEM Reference | ZF 2093.303.091 |
Compatibility
This helical gear is specifically engineered for the ZF WG100, WG130, and WG131 series transmissions. It is also compatible with certain variants of the WG180 and WG200 models that share the same auxiliary drive architecture. Always verify the existing gear tooth count and shaft diameter before ordering. The 2093.303.091 is not interchangeable with straight-cut gears used in older ZF WG series units.
Installation Notes
When replacing the 2093.303.091, inspect the mating 2093109002: DIFFERENTIAL for wear patterns, as a damaged helical gear often indicates misalignment in the differential assembly. Always install a new 0750117075: TAPER ROLLER BEARING on the gear shaft to maintain proper preload. The 2093209095: DIFFERENTIAL and 2093309071: DIFF.HOUSING should be cleaned of all debris before reassembly to prevent premature failure of the new gear.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2093109002 | DIFFERENTIAL | Distributes torque between output shafts |
| 0750117075 | TAPER ROLLER BEARING | Supports gear shaft radial and axial loads |
| 2093209095 | DIFFERENTIAL | Secondary differential for multi-axle drives |
| 2093309071 | DIFF.HOUSING | Encloses and aligns differential gears |
| 0631100223 | SPRING PIN | Secures gear to shaft via cross-hole |
| 0730300820 | THRUST WASHER | Controls axial clearance of gear assembly |
| 4482360002 | AXLE BEVEL GEAR | Transfers power to wheel axles |
| 2097309085 | DIFFERENTIAL AXLE | Carries differential side gears |
| 5838300811 | THRUST WASHER | Reduces friction on differential cross-shaft |
| 4482360001 | DIFFERENTIAL BEVEL GEAR | Meshes with axle bevel gear for final drive |
Frequently Asked Questions
Q: Can the 2093.303.091 helical gear be used in a ZF WG180 transmission?
A: Yes, the 2093.303.091 is compatible with WG180 models that utilize the same auxiliary drive gear train. However, you must confirm the shaft diameter and tooth profile match your specific unit, as some WG180 variants use a different helix angle.
Q: What torque specification should I use when installing the retaining nut on this gear?
A: The retaining nut for the 2093.303.091 should be torqued to 120 Nm (88 lb-ft) with a new cotter pin. Always replace the 0631100223: SPRING PIN during installation to prevent the gear from loosening under load.
Q: How can I tell if my helical gear is worn without removing the transmission?
A: Listen for a rhythmic whine that increases with engine RPM but disappears when coasting. You can also drain a small oil sample and check for metallic glitter—this is a strong indicator that the 2093.303.091 is shedding material and needs replacement.
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ZF 2093.303.091 HELICAL GEAR – Gear RFQ Support
PartsZF helps B2B buyers source ZF 2093.303.091 HELICAL 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 2093.303.091 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Illustration section: COUNTERSHAFT
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 | 2093.303.091 |
|---|---|
| Normalized SKU | 2093303091 |
| Part name | HELICAL GEAR |
| Product category | gear |
| Cross-reference support | Available for RFQ review |
Image and Documentation Notes
Current product media status: diagram. 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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