Overview
This genuine ZF 2097.129.003 Brake Shaft is a critical component within the WG100, WG130, and WG131 transmission assemblies. It functions as the primary mechanical interface for the parking brake system, transferring torque from the brake drum to the transmission output shaft. As an OEM part, it ensures precise engagement and disengagement of the brake mechanism, directly influencing vehicle hold and safety during stationary periods. The SKU 2097.129.003 is engineered to ZF’s exacting tolerances, making it a direct replacement for worn or damaged shafts in heavy-duty industrial drivelines.
Symptoms of Failure
- Intermittent brake drag or incomplete release: When the brake shaft wears at its spline interface, the brake drum may not fully disengage, causing a persistent grinding noise during vehicle movement. This is often searched as “ZF transmission brake drag symptoms.”
- Oil seepage from the output seal area: A worn brake shaft can develop micro-fractures or surface pitting near the seal journal, leading to transmission fluid leaks. Technicians frequently look for “ZF WG100 brake shaft oil leak fix.”
- Reduced parking brake holding power on inclines: If the shaft’s keyway or spline teeth become stripped, the brake assembly cannot maintain torque, resulting in vehicle roll on slopes. This is a common query for “WG130 parking brake failure causes.”
- Excessive axial play in the output flange: Bearing surface wear on the brake shaft allows the output flange to move laterally, which can be felt as a clunk during gear engagement. This symptom is often reported as “ZF transmission output shaft play.”
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 2097.129.003 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Overall Length | 215 mm (8.46 in) |
| Shaft Diameter (seal journal) | 45 mm (1.77 in) |
| Spline Count | 24 involute splines |
| Weight | 1.85 kg (4.08 lbs) |
| OEM Reference | ZF 2097.129.003 |
| Surface Hardness | 58-62 HRC |
Compatibility
This brake shaft is specifically designed for ZF WG-series transmissions, including the WG100, WG130, and WG131 models. It is also compatible with select WG180 and WG200 variants that share the same output brake architecture. For applications in agricultural tractors, construction loaders, and industrial material handlers, verify your transmission’s serial number against ZF’s parts catalog to confirm fitment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2093109018 | DIFFERENTIAL | Distributes torque between axles in the final drive assembly |
| 0750117075 | TAPER ROLLER BEARING | Supports radial and axial loads on the brake shaft |
| 2093209023 | DIFFERENTIAL | Secondary differential for multi-axle torque splitting |
| 5838300626 | DIFFERENTIAL HOUSING | Encloses and supports differential gears and bearings |
| 0631329088 | SPRING PIN | Secures brake shaft components against rotational movement |
| 5838300811 | THRUST WASHER | Controls axial clearance between rotating and stationary parts |
| 5838300721 | AXLE BEVEL GEAR | Transfers power at a 90-degree angle within the differential |
| 5838300633 | AXLE | Transmits rotational force from differential to wheel hubs |
| 5838300753 | THRUST WASHER | Reduces friction on the axle bevel gear side face |
| 5838300818 | THRUST WASHER | Provides wear surface for differential gear thrust loads |
Frequently Asked Questions
Q: Can I install the ZF 2097.129.003 brake shaft without replacing the taper roller bearing?
A: It is strongly recommended to replace the 0750117075 TAPER ROLLER BEARING simultaneously, as worn bearings can cause premature shaft wear and misalignment.
Q: How do I know if my WG130 transmission uses this specific brake shaft?
A: Check the stamped part number on the shaft body near the spline end. If it reads 2097.129.003, it is a direct match. For WG131 models, also verify the differential housing part number 5838300626 for compatibility.
Q: What torque specification is required for the brake shaft retaining nut?
A: ZF specifies 180 Nm (133 ft-lbs) for the output flange nut. Always use a new spring pin 0631329088 to lock the nut after torquing.
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Phone: +86 158 2286 3467 |
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ZF 2097.129.003 BRAKE SHAFT – Shaft RFQ Support
PartsZF helps B2B buyers source ZF 2097.129.003 BRAKE SHAFT with fast RFQ support, expert part-number lookup, documentation review, and export coordination. This shaft 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 2097.129.003 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: TRA 20
- 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 | 2097.129.003 |
|---|---|
| Normalized SKU | 2097129003 |
| Part name | BRAKE SHAFT |
| Product category | shaft |
| Cross-reference support | Available for RFQ review |
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.
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