Overview
The ZF 2093.303.071 HELICAL GEAR is a precision-engineered component designed for the auxiliary drive and power take-off (PTO) systems within ZF WG100, WG130, and WG131 transmissions. This OEM genuine part transfers rotational force between parallel shafts, reducing noise and vibration through its angled tooth design. Located in the upper gear train, it directly engages with the differential assembly to manage torque distribution. The SKU 2093.303.071 is manufactured to exact ZF tolerances, ensuring seamless meshing with companion gears and shafts. When installed alongside a 2093109002: DIFFERENTIAL, this helical gear maintains consistent load distribution under heavy-duty cycles.
Symptoms of Failure
- Whining or howling noise during acceleration: Worn helical gear teeth produce a distinct high-pitched whine that intensifies under load, often mistaken for differential noise. This indicates uneven tooth contact or pitting on the 2093.303.071 gear face.
- Intermittent power loss to auxiliary equipment: A failing gear slips under torque, causing PTO-driven pumps or winches to lose RPM unpredictably. This symptom worsens when paired with a worn 0750117075: TAPER ROLLER BEARING that allows shaft play.
- Metallic debris in transmission fluid: Flakes or silver particles on the drain plug magnet signal advanced gear spalling. Immediate inspection of the 2093.303.071 and its mating 2093209095: DIFFERENTIAL is required to prevent cascading damage.
- Vibration through the gearshift lever: Excessive backlash from a worn helical gear transmits harmonic vibrations into the cab, particularly at 40-50 km/h. This often correlates with misalignment in the 2093309071: DIFF.HOUSING.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 2093.303.071 |
| Gear Type | Helical, Right-Hand Spiral |
| Module | 4.5 mm |
| Number of Teeth | 27 |
| Outside Diameter | 130.5 mm |
| Face Width | 32 mm |
| Bore Diameter | 35 mm (H7 tolerance) |
| Material | Case-Hardened 20MnCr5 Alloy Steel |
| Heat Treatment | Carburized & Tempered (58-62 HRC) |
| Weight | 1.85 kg |
| OEM Reference | ZF 2093.303.071 |
| Surface Finish | Ground Tooth Flanks (Ra ≤ 0.8 µm) |
Compatibility
This helical gear is engineered for ZF’s medium-duty WG series transmissions. Verified fitment includes the WG100, WG130, and WG131 models commonly used in municipal trucks, fire apparatus, and construction loaders. It also cross-references to select WG180 and WG200 variants produced between 2005-2018, though confirmation of the differential housing bore is recommended. The 2093.303.071 is not compatible with WG80 or WG250 series due to differing shaft center distances.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2093109002 | DIFFERENTIAL | Distributes torque between axles; mates directly with helical gear |
| 0750117075 | TAPER ROLLER BEARING | Supports gear shaft radial and axial loads |
| 2093209095 | DIFFERENTIAL | Secondary differential for inter-axle torque split |
| 2093309071 | DIFF.HOUSING | Encloses differential gears; aligns helical gear mesh |
| 0631100223 | SPRING PIN | Secures gear to shaft; prevents rotational slippage |
| 0730300820 | THRUST WASHER | Controls axial clearance between gear and housing |
| 4482360002 | AXLE BEVEL GEAR | Transfers power from differential to axle shafts |
| 2097309085 | DIFFERENTIAL AXLE | Carries differential side gears; interfaces with helical gear |
| 5838300811 | THRUST WASHER | Reduces friction between differential gears and housing |
| 4482360001 | DIFFERENTIAL BEVEL GEAR | Provides final torque multiplication to wheel ends |
Frequently Asked Questions
Q: Can I replace just the 2093.303.071 helical gear without replacing the mating differential?
A: While possible, we strongly recommend inspecting the 2093109002: DIFFERENTIAL for wear. A worn differential will accelerate wear on the new helical gear. Replace both if backlash exceeds 0.25 mm.
Q: What torque specification should I use for the retaining nut on this gear?
A: The helical gear lock nut requires 180 Nm ± 10 Nm. Always use a new 0631100223: SPRING PIN to prevent loosening during operation.
Q: How do I identify if my WG130 transmission uses this gear?
A: Check the transmission data plate for “WG130” and measure the gear bore. The 2093.303.071 has a 35 mm bore. If your unit has a 40 mm bore, you need the WG180 variant (part 2093.303.072).
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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ZF 2093.303.071 HELICAL GEAR – Gear RFQ Support
Use ZF 2093.303.071 HELICAL GEAR as the reference when requesting gear support. Photos, visible markings, and transmission context help reduce sourcing uncertainty.
Part-Number Summary
Use ZF number 2093.303.071 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 | 2093.303.071 |
|---|---|
| Normalized SKU | 2093303071 |
| Part name | HELICAL GEAR |
| Product category | gear |
| 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 4661.302.010 GEAR
- ZF 2094.306.024 GEAR SHIFT RAIL
- ZF 4642.353.026 SPUR GEAR
- ZF 4143.142.013 GEAR SHIFT SENSOR
- ZF 4143.142.022 GEAR SHIFT SENSOR
