Overview
The ZF 4681.301.020 STATOR SHAFT is a precision-machined component engineered for the BP210, BP230, WG190, and WG210 series transmissions. This OEM genuine part serves as the central torque-reaction element within the torque converter assembly, transferring hydraulic power from the turbine to the planetary gearset. The SKU 4681.301.020 is manufactured to exact ZF tolerances, ensuring proper oil flow through its internal galleries and maintaining correct alignment between the pump and turbine assemblies. When installed alongside the 4657101088: TRANSMISSION HOUSING, this stator shaft creates the sealed hydraulic circuit necessary for smooth power delivery in heavy-duty industrial applications.
Symptoms of Failure
- Torque converter shudder during lock-up: A worn stator shaft causes inconsistent stator one-way clutch engagement, leading to vibration when the converter locks at highway speeds.
- Low stall speed or sluggish acceleration: Internal spline wear on the 4681.301.020 reduces torque multiplication, making the vehicle feel underpowered from a standstill.
- Metallic debris in transmission fluid: Flaking or spalling on the shaft surface contaminates the hydraulic system, often found during routine oil analysis or filter inspection.
- Intermittent gear slippage in lower ratios: Insufficient stator support causes pressure drops in the 4657201183: HOUS.FRONT SECT, resulting in delayed engagement or slipping in first and second gears.
Technical Specifications
| Part Number | 4681.301.020 |
| Material | Case-hardened alloy steel (SAE 8620 equivalent) |
| Overall Length | 187.5 mm |
| Outer Diameter | 42.0 mm (splined section) |
| Internal Spline Count | 27 teeth, 30° pressure angle |
| Weight | 0.85 kg (1.87 lbs) |
| OEM Reference | ZF 4681.301.020 (genuine) |
| Surface Treatment | Phosphate coating for corrosion resistance |
Compatibility
This stator shaft is designed for ZF’s BP and WG series powershift transmissions used in construction, mining, and material handling equipment. Direct fitment includes the BP210, BP230, WG190, and WG210 models. It also serves as a replacement in earlier WG180 and WG200 variants when the torque converter assembly is upgraded. The shaft interfaces directly with the 4657201184: HOUSING REAR PART and the 4657298111: HOUSING REAR SECTION, making it a critical component for any full transmission rebuild involving these housing assemblies.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101088 | TRANSMISSION HOUSING | Main structural casing for gearset and valve body |
| 4657201183 | HOUS.FRONT SECT | Front section housing the torque converter and pump |
| 4657201184 | HOUSING REAR PART | Rear housing supporting output shaft and clutches |
| 4657298111 | HOUSING REAR SECTION | Rear section extension for PTO or auxiliary drives |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing-to-shaft positioning |
| 0636100801 | CAP SCREW | M10 fastener securing stator shaft to housing |
| 4681301015 | FIXING PLATE | Locking plate preventing shaft rotation |
| 4681301016 | SCREEN SHEET | Fine mesh filter for stator oil feed circuit |
| 4681301017 | SCREEN SHEET | Coarse mesh pre-filter for torque converter circuit |
| 0636100803 | CAP SCREW | M12 fastener for rear housing attachment |
Frequently Asked Questions
Q: Can the 4681.301.020 stator shaft be reused after a transmission failure?
No. This shaft experiences high torsional loads and surface wear during operation. ZF recommends always replacing the stator shaft with a new OEM genuine part during any rebuild to avoid premature failure of the torque converter assembly.
Q: How do I verify correct installation of this stator shaft?
Ensure the splined end engages fully with the stator one-way clutch and that the oil feed holes align with the passages in the 4657201183: HOUS.FRONT SECT. Torque the cap screws (0636100801) to 45 Nm using a calibrated wrench.
Q: Will this part fit a ZF WG180 transmission?
Yes, the 4681.301.020 is compatible with WG180 models that have been updated to the later torque converter design. Verify your transmission serial number against ZF’s supersession list before ordering.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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ZF 4681.301.020 STATOR SHAFT – Shaft RFQ Support
PartsZF helps B2B buyers source ZF 4681.301.020 STATOR 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 4681.301.020 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 | 4681.301.020 |
|---|---|
| Normalized SKU | 4681301020 |
| Part name | STATOR 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
- ZF 4657.303.042 OUTPUT SHAFT
- ZF 4646.302.106 INPUT SHAFT
- ZF 4657.302.006 TURBINE SHAFT
- ZF 4646.303.100 INPUT SHAFT
- ZF 4657.303.043 OUTPUT SHAFT
