Overview
The ZF 4657.354.031 PUMP SHAFT is a critical rotating component engineered for the WG190 and WG210 series transmissions. This OEM genuine part serves as the primary drive interface between the transmission’s oil pump and the torque converter, ensuring precise hydraulic pressure delivery for clutch engagement and gear shifts. The shaft, identified by SKU 4657.354.031, is machined from high-tensile steel to withstand torsional loads and maintain concentricity within the TRANSMISSION HOUSING. It directly interfaces with the HOUS.FRONT SECT and the HOUSING REAR PART to form a sealed oil gallery. A CYLINDRICAL PIN is used to lock the shaft into its correct rotational orientation during assembly.
Symptoms of Failure
- Low hydraulic pressure and delayed engagement: When the pump shaft wears at its splines or bearing journals, the oil pump cannot maintain adequate pressure, causing a noticeable lag when shifting from Park to Drive or Reverse.
- Intermittent gear slipping under load: A worn shaft allows the pump rotor to wobble, leading to erratic clutch pack pressure. This often manifests as a “flare” or slip during 2-3 upshifts on the WG190.
- Oil leaks from the front pump area: Scoring on the shaft’s sealing surface damages the front pump seal, resulting in fluid weeping from the bell housing weep hole.
- Metallic debris in the transmission pan: Flaking or spalling on the shaft’s hardened surface produces fine steel particles that contaminate the hydraulic circuit.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.354.031 |
| Overall Length | 215 mm (estimated) |
| Shaft Diameter (Bearing Journal) | 28 mm |
| Spline Count | 16-tooth involute |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Weight | 0.85 kg |
| OEM Reference | ZF 4657.354.031 |
Compatibility
This pump shaft is specifically designed for ZF’s WG-series powershift transmissions. It is a direct fit for the WG190 and WG210 models, which are commonly used in construction and agricultural machinery. The shaft also retrofits into the WG180 and WG200 series, provided the corresponding TRANSMISSION HOUSING and HOUS.FRONT SECT are from the same generation. Always verify the spline engagement with the HOUSING REAR PART before final installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101033 | TRANSMISSION HOUSING | Main structural casing that supports the pump shaft and gear sets. |
| 4657201027 | HOUS.FRONT SECT | Front section housing that aligns the pump shaft bearing. |
| 4657201012 | HOUSING REAR PART | Rear section that seals the oil pump cavity around the shaft. |
| 0631306792 | CYLINDRICAL PIN | Locating pin for precise shaft alignment during assembly. |
| 0636100801 | CAP SCREW | Fastener for securing the pump shaft retaining plate. |
| 4656301148 | FIXING PLATE | Locking plate that prevents axial movement of the shaft. |
| 4657301032 | SCREEN SHEET | Fine mesh filter protecting the pump inlet from debris. |
| 4657301033 | SCREEN SHEET | Secondary filter screen for the pump suction line. |
| 0636100803 | CAP SCREW | Bolt for the pump shaft bearing retainer. |
| 4681301040 | OIL FEED.HOUSG. | Housing that directs pressurized oil from the pump to the valve body. |
Frequently Asked Questions
Q: Can I reuse the old CYLINDRICAL PIN when installing a new pump shaft?
A: No. The CYLINDRICAL PIN (0631306792) is a single-use interference-fit component. Reusing it risks shearing the pin, which would allow the shaft to rotate out of phase with the pump rotor.
Q: Does this shaft require any special lubrication during installation?
A: Yes. Apply a thin film of clean transmission fluid to the shaft’s bearing journals and splines. Do not use grease, as it can clog the oil feed passages in the OIL FEED.HOUSG..
Q: How do I verify the shaft is seated correctly in the housing?
A: After inserting the shaft, rotate it by hand. It should spin freely without binding. Then install the FIXING PLATE (4656301148) and torque the CAP SCREW to 25 Nm. Check that the shaft end-play is between 0.05 and 0.15 mm.
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ZF 4657.354.031 PUMP SHAFT – Shaft RFQ Support
PartsZF helps B2B buyers source ZF 4657.354.031 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 4657.354.031 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Documentation reference: 4657024014
- Documentation reference: 4657024019
- Documentation reference: 4657054031
- 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 | 4657.354.031 |
|---|---|
| Normalized SKU | 4657354031 |
| 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.
Related Parts
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- ZF 4646.304.069 OUTPUT SHAFT
- ZF 4646.304.065 QUILL SHAFT
- ZF 4657.354.010 INPUT SHAFT
