Overview
The ZF 4681.354.003 PUMP SHAFT is a critical rotating component within the BP230, WG190, and WG210 series transmissions. This OEM genuine part transmits torque directly from the transmission oil pump to the gear train, ensuring consistent hydraulic pressure for clutch engagement and lubrication. Identified by SKU 4681.354.003, this shaft sits within the pump housing assembly and interfaces with the TRANSMISSION HOUSING to maintain precise alignment. Without a properly functioning pump shaft, the entire hydraulic system loses pressure, leading to immediate operational degradation.
Symptoms of Failure
- Intermittent gear slipping under load: When the 4681.354.003 shaft wears at the spline interface, the pump cannot maintain steady pressure, causing the transmission to slip during acceleration or hill climbs.
- Low hydraulic pressure warnings or erratic shifting: A worn pump shaft reduces oil flow, triggering dashboard alerts or harsh, unpredictable gear changes as the valve body receives inconsistent fluid supply.
- Metallic debris in transmission fluid: Surface spalling or pitting on the shaft deposits fine metal particles into the oil, often visible during routine fluid changes or when inspecting the HOUS.FRONT SECT for contamination.
- Oil leaks near the pump mounting area: A cracked or misaligned shaft can damage the pump seal, allowing fluid to escape around the HOUSING REAR PART interface.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4681.354.003 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Overall Length | 185 mm (estimated) |
| Shaft Diameter | 28 mm (bearing journal) |
| Spline Count | 14-tooth involute spline |
| Weight | 0.85 kg (1.87 lbs) |
| OEM Reference | ZF 4681.354.003 |
| Surface Treatment | Black oxide finish |
Compatibility
This pump shaft is engineered for ZF’s medium-duty transmission family. It is directly compatible with the BP 230 Series, WG 190 Series, and WG 210 Series. Based on the part type and spline geometry, it also fits the WG180 and WG200 models when used with the correct HOUSING REAR SECTION. Always verify shaft engagement with your specific pump housing before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101088 | TRANSMISSION HOUSING | Main structural casing that encloses the pump shaft and gearset |
| 4657201183 | HOUS.FRONT SECT | Front section housing that supports the pump shaft bearing |
| 4657201184 | HOUSING REAR PART | Rear housing segment that aligns the output shaft |
| 4657298111 | HOUSING REAR SECTION | Alternative rear housing variant for specific transmission models |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for securing housing sections |
| 0636100801 | CAP SCREW | Fastener for pump shaft retaining plate |
| 4681301015 | FIXING PLATE | Locks the pump shaft in axial position |
| 4681301016 | SCREEN SHEET | Fine mesh filter protecting the pump inlet |
| 4681301017 | SCREEN SHEET | Secondary filter screen for hydraulic circuit |
| 0636100803 | CAP SCREW | Mounting bolt for housing cover |
Frequently Asked Questions
Q: Can the 4681.354.003 pump shaft be replaced without removing the entire transmission?
A: In most BP230 and WG190 applications, the pump shaft is accessible after removing the transmission oil pan and pump assembly. However, on WG210 models, you may need to separate the HOUS.FRONT SECT to gain clearance.
Q: How do I confirm the shaft is the correct length for my ZF transmission?
A: Measure the distance from the pump drive gear face to the rear bearing shoulder. The 4681.354.003 shaft has a 185 mm overall length. Compare this against your original shaft; if it matches, it is compatible with BP230, WG190, and WG210 series.
Q: What torque specification should I use for the fixing plate bolts?
A: When installing the FIXING PLATE that retains this shaft, use 25 Nm (18.4 lb-ft) for the M8 cap screws. Always apply thread locker to prevent loosening from pump vibration.
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ZF 4681.354.003 PUMP SHAFT – Shaft RFQ Support
PartsZF helps B2B buyers source ZF 4681.354.003 PUMP 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 4681.354.003 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: 4657054602
- Documentation reference: 4657054603
- Documentation reference: 4657054605
- 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 | 4681.354.003 |
|---|---|
| Normalized SKU | 4681354003 |
| Part name | PUMP 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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- ZF 4646.304.065 QUILL SHAFT
- ZF 4657.354.010 INPUT SHAFT
