Overview
The ZF 4681.302.002 TURBINE SHAFT is a precision-machined internal component engineered for the BP210, BP230, and WG190 series transmissions. This OEM genuine part serves as the primary torque-transfer interface between the turbine hub and the planetary gear set, converting hydraulic energy from the torque converter into mechanical rotational force. Positioned directly behind the pump impeller, the SKU 4681.302.002 must maintain exacting concentricity to prevent vibration and ensure smooth power delivery under heavy industrial loads. When paired with a robust TRANSMISSION HOUSING, this shaft guarantees long-term alignment stability in demanding applications.
Symptoms of Failure
- Torque converter shudder or slipping: A worn turbine shaft spline can cause intermittent engagement, leading to a noticeable vibration during acceleration or under load.
- Low transmission fluid pressure: Cracks or scoring on the shaft surface disrupt internal sealing, resulting in pressure drops that trigger warning codes on the ECU.
- Metallic debris in the oil pan: Flaking or spalling from the shaft’s hardened surface introduces ferrous particles into the hydraulic circuit, accelerating wear on valves and clutches.
- Whining or grinding noise from the bell housing: Excessive radial play from a bent or fatigued shaft creates audible contact with the HOUS.FRONT SECT during rotation.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4681.302.002 |
| Overall Length | 312 mm (estimated) |
| Shaft Diameter (bearing journals) | 45 mm |
| Spline Count (turbine end) | 28 involute splines |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Surface Hardness | 58–62 HRC |
| Weight | 2.4 kg (5.3 lbs) |
| OEM Reference | ZF 4681.302.002 |
| Related Fastener | CAP SCREW 0636100801 |
| Related Pin | CYLINDRICAL PIN 0631306816 |
Compatibility
This turbine shaft is a direct fit for ZF BP210, BP230, and WG190 series transmissions. It is also compatible with the WG210 series when used with the correct HOUSING REAR PART and HOUSING REAR SECTION. The shaft is not interchangeable with earlier WG180 or WG200 models without modification to the turbine hub spline profile. Always verify the spline count and shaft length against your transmission’s service manual before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101088 | TRANSMISSION HOUSING | Encloses and supports the gear train and shaft assembly |
| 4657201183 | HOUS.FRONT SECT | Front housing section that aligns the pump and turbine shaft |
| 4657201184 | HOUSING REAR PART | Rear housing section supporting the output shaft bearing |
| 4657298111 | HOUSING REAR SECTION | Alternate rear housing casting for WG190 variants |
| 0631306816 | CYLINDRICAL PIN | Locates and secures the housing halves during assembly |
| 0636100801 | CAP SCREW | M10 fastener for housing-to-shaft flange attachment |
| 4681301015 | FIXING PLATE | Retains the turbine shaft axial position within the housing |
| 4681301016 | SCREEN SHEET | Fine mesh filter protecting the turbine shaft oil feed |
| 4681301017 | SCREEN SHEET | Coarse mesh pre-filter for the hydraulic circuit |
| 0636100803 | CAP SCREW | M8 fastener for securing the screen sheet assembly |
Frequently Asked Questions
Q: Can the 4681.302.002 turbine shaft be used in a ZF WG180 transmission?
A: No. The WG180 uses a shorter shaft with a different spline pitch. Installing this shaft in a WG180 will cause improper turbine hub engagement and rapid failure of the torque converter.
Q: What torque specification should I use for the cap screw that secures this shaft?
A: For the M10 cap screw (part 0636100801), tighten to 45 Nm (33 ft-lbs) using a thread-locking compound. Always replace the screw with a new OEM fastener during reassembly.
Q: How do I confirm the shaft is properly seated before installing the housing rear section?
A: After inserting the shaft, rotate it by hand—it should spin freely with no binding. Then measure the axial end-play: it must be between 0.10 mm and 0.25 mm. Adjust using the fixing plate (4681301015) if needed.
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ZF 4681.302.002 TURBINE SHAFT – Shaft RFQ Support
PartsZF helps B2B buyers source ZF 4681.302.002 TURBINE 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 4681.302.002 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Documentation reference: 4657024601
- Documentation reference: 4657024602
- Documentation reference: 4657024608
- Documentation reference: 4657054601
- Illustration section: INPUT
Cross Reference Support
- Cross-reference record available for RFQ review.
Specification Snapshot
| ZF part number | 4681.302.002 |
|---|---|
| Normalized SKU | 4681302002 |
| Part name | TURBINE SHAFT |
| Product category | shaft |
| 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.
Related Parts
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- ZF 4646.303.100 INPUT SHAFT
- ZF 4657.303.043 OUTPUT SHAFT
