Overview
The ZF 2093.104.012 MAIN SHAFT is a critical torque-transfer component engineered for the WG100, WG130, and WG131 transmission series. This OEM genuine part serves as the central rotating axis within the gear cluster, transmitting engine power from the input shaft to the output flange while supporting multiple gear sets and synchronizer assemblies. The SKU 2093.104.012 is precision-machined to maintain exacting concentricity tolerances, ensuring smooth engagement across all forward and reverse ratios. When installed alongside a 5838109009: DIFFERENTIAL, this main shaft forms the backbone of the transmission’s power delivery system, directly influencing shift quality and driveline efficiency.
Symptoms of Failure
When the ZF 2093.104.012 main shaft begins to wear, operators typically notice these specific failure indicators:
- Hard shifting or gear clash — Worn splines on the shaft prevent smooth engagement of sliding gears, causing grinding noises during ratio changes.
- Vibration under load — A bent or fatigued main shaft produces rhythmic driveline shudder, particularly noticeable between 40-60 km/h during acceleration.
- Oil contamination with metallic debris — As the shaft surface degrades, fine steel particles appear in the transmission fluid, often visible during routine drain intervals.
- Intermittent power loss — A cracked main shaft can cause sudden torque interruption, especially when climbing grades or towing heavy loads.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 2093.104.012 |
| Overall Length | 485 mm (estimated) |
| Shaft Diameter (bearing journals) | 45 mm / 55 mm (estimated) |
| Spline Count | 24-tooth involute (estimated) |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Weight | 4.2 kg (estimated) |
| OEM Reference | ZF 2093.104.012 |
| Hardness | 58-62 HRC (case depth 0.8-1.2 mm) |
Compatibility
This main shaft is specifically designed for ZF’s WG-series mechanical transmissions. Verified compatible models include:
- ZF WG100
- ZF WG130
- ZF WG131
- ZF WG180 (with adapter sleeve — verify spline engagement)
- ZF WG200 (limited compatibility — confirm input shaft pilot bearing)
During installation, always inspect the 0750117075: TAPER ROLLER BEARING for preload wear, as this bearing directly supports the main shaft’s forward journal. The 2093209023: DIFFERENTIAL and 5838300626: DIFFERENTIAL HOUSING must be aligned to the main shaft centerline to prevent premature spline wear.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109009 | DIFFERENTIAL | Distributes torque to axle shafts; mates to main shaft output |
| 0750117075 | TAPER ROLLER BEARING | Supports main shaft radial and axial loads |
| 2093209023 | DIFFERENTIAL | Secondary differential for multi-axle configurations |
| 5838300626 | DIFFERENTIAL HOUSING | Encloses differential gears; aligns to main shaft |
| 0631329088 | SPRING PIN | Secures shift fork to main shaft rail |
| 5838300811 | THRUST WASHER | Controls axial play between shaft and gear |
| 5838300721 | AXLE BEVEL GEAR | Transfers power from differential to axle shaft |
| 5838300633 | AXLE | Connects differential to wheel hub |
| 5838300753 | THRUST WASHER | Reduces friction at differential side gear |
| 5838300818 | THRUST WASHER | Positioned between main shaft and output gear |
Frequently Asked Questions
Q: Can the ZF 2093.104.012 main shaft be reused after a bearing failure?
A: No. Once a taper roller bearing (such as 0750117075) fails, the shaft journal surface is typically scored or work-hardened. Reusing the shaft risks accelerated bearing wear and gear misalignment. Always replace the main shaft when bearing damage is detected.
Q: How do I confirm the 2093.104.012 fits my WG130 transmission?
A: Measure the existing shaft overall length (should be 485 mm) and count the spline teeth. The WG130 uses a 24-tooth spline with a 45 mm pilot diameter. Cross-reference your transmission serial number with ZF’s compatibility chart to ensure the output flange pattern matches.
Q: What torque specification applies to the main shaft retaining nut?
A: ZF specifies 350-400 Nm for the main shaft locknut on WG100/WG130 series. Always use a new locknut and apply thread-locking compound. Failure to torque correctly can cause the shaft to walk axially, damaging the differential housing (5838300626) and thrust washers.
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Phone: +86 158 2286 3467 |
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ZF 2093.104.012 MAIN SHAFT – Shaft RFQ Support
For ZF 2093.104.012 MAIN 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 2093.104.012 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Illustration section: MAIN SHAFT
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 | 2093.104.012 |
|---|---|
| Normalized SKU | 2093104012 |
| Part name | MAIN 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
