Overview
The ZF 2093.129.020 BRAKE SHAFT is a critical component within the ZF WG100, WG130, and WG131 transmission assemblies. This genuine OEM part serves as the primary interface between the braking mechanism and the planetary gearset, converting hydraulic pressure into mechanical force to halt the output shaft. As part of the transmission’s internal brake pack, the shaft ensures precise engagement and disengagement during gear shifts. The SKU 2093.129.020 is engineered to OEM tolerances, guaranteeing a direct fit and long service life. When paired with a properly functioning 2093109029: DIFFERENTIAL, this brake shaft maintains smooth power delivery and prevents driveline shudder.
Symptoms of Failure
- Delayed or harsh engagement when shifting into gear — A worn brake shaft can cause a noticeable lag or a jarring clunk when the transmission engages, often described as “transmission slamming into gear.”
- Intermittent loss of drive under load — If the shaft’s splines or bearing surfaces are damaged, the brake pack may fail to hold torque, leading to “transmission slipping under acceleration” or “loss of power on inclines.”
- Metallic grinding or whining noise from the transmission housing — Excessive wear on the shaft’s contact points produces a distinct “grinding noise when driving” or “whining sound from differential area,” indicating imminent failure.
- Oil contamination with metallic debris — A failing brake shaft sheds metal particles into the transmission fluid, visible as “shiny particles in transmission oil” or “metal shavings on drain plug.”
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 2093.129.020 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Overall Length | 185 mm |
| Shaft Diameter | 32 mm (bearing journal) |
| Spline Count | 24 involute splines |
| Weight | 1.45 kg |
| OEM Reference | ZF 2093.129.020 |
| Hardness | 58-62 HRC (case depth 0.8 mm) |
Compatibility
This brake shaft is specifically designed for the ZF WG100, WG130, and WG131 series transmissions. It also fits select variants of the WG180 and WG200 models when used with the correct 0750117075: TAPER ROLLER BEARING and 2093209094: DIFFERENTIAL. Always verify compatibility with your specific transmission serial number. For heavy-duty applications, pairing this shaft with a reinforced 2093309078: DIFF.HOUSING is recommended to handle increased torque loads.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2093109029 | DIFFERENTIAL | Distributes torque between axles |
| 0750117075 | TAPER ROLLER BEARING | Supports shaft radial and axial loads |
| 2093209094 | DIFFERENTIAL | Secondary torque distribution unit |
| 2093309078 | DIFF.HOUSING | Encloses and supports differential gears |
| 0631100223 | SPRING PIN | Secures shaft alignment |
| 0730300820 | THRUST WASHER | Reduces axial friction |
| 4482360002 | AXLE BEVEL GEAR | Transfers power to axle shafts |
| 2097309085 | DIFFERENTIAL AXLE | Connects differential to wheel hubs |
| 5838300811 | THRUST WASHER | Controls gear end-play |
| 4482360001 | DIFFERENTIAL BEVEL GEAR | Meshes with axle bevel gear |
Frequently Asked Questions
Q: How do I know if my ZF 2093.129.020 brake shaft is failing?
A: Listen for a metallic grinding noise from the transmission area, especially when shifting from neutral to drive. Also check for metal particles in the transmission fluid during routine oil changes.
Q: Can I replace just the brake shaft without replacing the entire brake pack?
A: Yes, the shaft can be replaced independently. However, we recommend inspecting the 0750117075: TAPER ROLLER BEARING and thrust washers simultaneously, as worn bearings accelerate shaft wear.
Q: Is this part compatible with the ZF WG200 transmission?
A: The 2093.129.020 is primarily for WG100/WG130/WG131 models. For WG200 applications, verify that your differential housing matches the 2093309078: DIFF.HOUSING dimensions before installation.
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Phone: +86 158 2286 3467 |
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ZF 2093.129.020 BRAKE SHAFT – Shaft RFQ Support
For ZF 2093.129.020 BRAKE 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 2093.129.020 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Illustration section: TRA 16
- Illustration section: BRAKE 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 | 2093.129.020 |
|---|---|
| Normalized SKU | 2093129020 |
| Part name | BRAKE 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
