Overview
The ZF 4681.302.003 INPUT SHAFT is a critical torque-transfer component engineered specifically for the BP210, BP230, and WG190 series transmissions. This OEM genuine part sits at the front of the gearbox assembly, directly coupling the engine’s flywheel to the planetary gear sets. As the primary rotational input member, the 4681.302.003 shaft must withstand extreme torsional loads and maintain precise alignment with the TRANSMISSION HOUSING to ensure smooth power delivery. Manufactured to ZF’s original specifications, this input shaft guarantees exact fitment and durability in heavy-duty commercial applications.
Symptoms of Failure
- Transmission input shaft oil leaks – Worn shaft seals or surface scoring allow hydraulic fluid to escape near the bell housing, leaving visible drips and reducing system pressure.
- Gear slipping under load – A damaged input shaft spline or bearing journal causes intermittent engagement loss, particularly during acceleration or hill climbs.
- Vibration and driveline shudder – Bent or unbalanced shafts produce rhythmic shaking through the chassis, often misdiagnosed as universal joint failure.
- Metallic grinding noise from front housing – Worn bearing surfaces on the 4681.302.003 shaft create a distinct scraping sound when the transmission is in gear.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4681.302.003 |
| OEM Reference | ZF 4681 302 003 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Overall Length | 385 mm (estimated) |
| Spline Diameter | 32 mm (input end) |
| Weight | 4.2 kg (9.3 lbs) |
| Surface Treatment | Nitrided wear-resistant coating |
| Bearing Journal Diameter | 55 mm |
Compatibility
This ZF 4681.302.003 input shaft is directly compatible with the following transmission models: BP210, BP230, WG190, WG210. It also fits select variants of the WG180, WG200, and WG160 series when used with the correct HOUS.FRONT SECT and HOUSING REAR PART. For WG190 applications, pairing with the HOUSING REAR SECTION ensures correct shaft end-play. Always verify your transmission serial number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101088 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201183 | HOUS.FRONT SECT | Front housing section supporting input shaft |
| 4657201184 | HOUSING REAR PART | Rear housing section for output components |
| 4657298111 | HOUSING REAR SECTION | Alternate rear housing variant |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing assembly |
| 0636100801 | CAP SCREW | Fastener for housing sections |
| 4681301015 | FIXING PLATE | Retains input shaft bearing |
| 4681301016 | SCREEN SHEET | Filter screen for oil circuit |
| 4681301017 | SCREEN SHEET | Secondary filter screen |
| 0636100803 | CAP SCREW | Mounting bolt for fixing plate |
Frequently Asked Questions
Q: Can the 4681.302.003 input shaft be installed without removing the transmission housing?
A: No. The input shaft is seated inside the TRANSMISSION HOUSING and requires full housing separation for access. Always replace the front seal and bearing simultaneously.
Q: How do I identify if my WG190 uses this specific shaft version?
A: Check the stamped part number on the shaft shoulder near the spline. The 4681.302.003 supersedes earlier revisions and is identifiable by its nitrided finish. Cross-reference with your HOUS.FRONT SECT casting number for compatibility.
Q: Is this input shaft interchangeable between BP210 and BP230 transmissions?
A: Yes, the 4681.302.003 is a common part across both series. However, verify that the FIXING PLATE and cap screws (0636100801/0636100803) are also updated to match the shaft’s bearing preload specification.
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ZF 4681.302.003 INPUT SHAFT – Shaft RFQ Support
PartsZF helps B2B buyers source ZF 4681.302.003 INPUT 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 4681.302.003 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 | 4681.302.003 |
|---|---|
| Normalized SKU | 4681302003 |
| Part name | INPUT 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.
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