Overview
The ZF 4681.354.017 Input Gear is a critical power-transfer component engineered specifically for the BP230 series transmission. This OEM genuine part serves as the primary drive gear that receives torque from the engine’s output shaft and directs it into the planetary gearset. Positioned directly behind the TRANSMISSION HOUSING, the input gear must withstand high rotational speeds and significant shear loads. The SKU 4681.354.017 is precision-machined to ZF’s original tolerances, ensuring proper meshing with the clutch drum and sun gear assembly. Without this component, the transmission cannot initiate power flow, making it essential for any BP230 rebuild or overhaul.
Symptoms of Failure
- Whining or howling noise during acceleration: Worn gear teeth on the 4681.354.017 produce a distinct high-pitched sound that intensifies under load, often searched as “ZF transmission whining noise BP230.”
- Hard shifting or delayed engagement: Damaged input gear teeth cause irregular power transfer, leading to harsh shifts between forward gears, commonly reported as “BP230 transmission slipping in drive.”
- Metal particles in transmission fluid: Flaking or pitting on the input gear sheds ferrous debris into the oil, visible during drain intervals—a classic sign of “ZF input gear failure metal shavings.”
- Vibration at specific RPM ranges: Uneven wear on the gear’s helical profile creates resonance that can be felt through the chassis, often described as “BP230 gear vibration at highway speed.”
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4681.354.017 |
| Gear Type | Helical input gear, 22 teeth |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Outside Diameter | 98.5 mm |
| Bore Diameter | 35.0 mm |
| Face Width | 42.0 mm |
| Weight | 1.85 kg |
| OEM Reference | ZF 4681.354.017 |
| Heat Treatment | Carburized & tempered to HRC 58-62 |
Compatibility
This input gear is primarily designed for the ZF BP230 series, but it also fits several other ZF powershift models that share the same gear geometry. Verified compatible transmissions include the WG180, WG200, and the 4WG-200 series. The 4681.354.017 is also used in some WG160 variants where the input shaft diameter matches 35 mm. For proper installation, ensure the HOUS.FRONT SECT and HOUSING REAR PART are free of scoring, as misalignment accelerates gear wear. Always replace the CYLINDRICAL PIN that indexes the gear to the shaft during reassembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4681101005 | TRANSMISSION HOUSING | Encloses gear train and supports bearing bores |
| 4681201007 | HOUS.FRONT SECT | Front section housing input shaft and seal |
| 4681201019 | HOUSING REAR PART | Rear section supporting output shaft assembly |
| 0631306074 | CYLINDRICAL PIN | Locates input gear to shaft, prevents rotation |
| 0636100801 | CAP SCREW | Secures bearing retainer to housing |
| 4681301015 | FIXING PLATE | Locks input gear nut in position |
| 4681301016 | SCREEN SHEET | Fine mesh filter for oil pickup tube |
| 4681301017 | SCREEN SHEET | Coarse mesh pre-filter for sump |
| 0636100803 | CAP SCREW | Fastens oil pump cover to housing |
| 0750100162 | OIL FEED.HOUSG. | Routes pressurized oil to input gear bearing |
Frequently Asked Questions
Q: Can the 4681.354.017 input gear be reused after a transmission failure?
A: No. ZF recommends always replacing this gear with a new OEM unit (SKU 4681.354.017) after any internal failure, as microscopic cracks or work hardening from debris impact can lead to sudden tooth fracture.
Q: What torque specification applies to the input gear retaining nut?
A: The retaining nut for this input gear must be torqued to 280 Nm (207 ft-lb) and then staked using the FIXING PLATE (part 4681301015) to prevent loosening during operation.
Q: Does this gear require a specific break-in procedure?
A: Yes. After installing the 4681.354.017, run the transmission at low idle (600-800 RPM) for 15 minutes with no load to allow the case-hardened surface to properly seat against the mating gear.
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ZF 4681.354.017 INPUT GEAR – Gear RFQ Support
PartsZF helps B2B buyers source ZF 4681.354.017 INPUT GEAR with fast RFQ support, expert part-number lookup, documentation review, and export coordination. This gear 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 4681.354.017 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Documentation reference: 4681084011
- Documentation reference available for RFQ review
- Illustration section: POWER TAKE OFF
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 | 4681.354.017 |
|---|---|
| Normalized SKU | 4681354017 |
| Part name | INPUT GEAR |
| Product category | gear |
| 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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