Overview
The ZF 4657.354.003 PUMP SHAFT is a critical rotating component engineered specifically for the hydraulic pump drive within the WG 190, WG 210, and WG 230 transmission series. This OEM genuine part transmits torque directly from the torque converter to the hydraulic pump, ensuring consistent oil flow for clutch actuation and lubrication. The SKU 4657.354.003 sits at the interface between the TRANSMISSION HOUSING and the pump assembly, where it must withstand high torsional loads and continuous rotational stress. Precision-ground bearing surfaces on this shaft maintain proper alignment, preventing premature wear on adjacent seals and bushings.
Symptoms of Failure
- Erratic clutch engagement or delayed shifting – A worn pump shaft reduces hydraulic pressure, causing soft shifts or hesitation when accelerating. This often manifests as “ZF transmission slow to engage” in diagnostic searches.
- Low hydraulic pressure warnings or pump cavitation noise – When the shaft splines strip or the bearing surface scores, the pump cannot maintain adequate flow, producing a whining or grinding sound from the transmission housing.
- Oil leaks at the pump-to-housing interface – Excessive shaft play damages the seal bore, leading to fluid seepage around the HOUS.FRONT SECT. This is commonly reported as “ZF WG190 oil leak near pump” by fleet operators.
- Metal debris in transmission fluid – Flaking or spalling on the shaft surface contaminates the oil, accelerating wear on the HOUSING REAR PART and other precision components.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 4657.354.003 |
| Overall Length | 185 mm (estimated) |
| Shaft Diameter (bearing journal) | 28 mm (estimated) |
| Spline Count | 14-tooth involute (estimated) |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Weight | 0.85 kg (1.87 lbs) |
| OEM Reference | ZF 4657.354.003 |
| Surface Hardness | 58-62 HRC (estimated) |
Compatibility
This pump shaft is designed for ZF WG-series powershift transmissions used in off-highway and industrial applications. Confirmed fitment includes the WG 190, WG 210, and WG 230 series. It is also mechanically compatible with the WG 180 and WG 200 models when used with the correct CYLINDRICAL PIN for alignment. Always verify the shaft spline count and overall length against your existing unit before installation. The 4657.354.003 replaces earlier revisions with improved surface treatment for extended service life in high-torque applications.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101033 | TRANSMISSION HOUSING | Main structural casing that supports the pump shaft and gear train |
| 4657201027 | HOUS.FRONT SECT | Front section housing that contains the pump shaft bearing bore |
| 4657201012 | HOUSING REAR PART | Rear housing section that aligns with the output shaft assembly |
| 0631306792 | CYLINDRICAL PIN | Precision dowel pin for locating housing halves during assembly |
| 0636100801 | CAP SCREW | M10 fastener securing the pump shaft retaining plate |
| 4656301148 | FIXING PLATE | Locking plate that prevents axial movement of the pump shaft |
| 4657301032 | SCREEN SHEET | Fine mesh filter protecting the pump inlet from debris |
| 4657301033 | SCREEN SHEET | Secondary filter screen for the pump return circuit |
| 0636100803 | CAP SCREW | M8 bolt for securing the screen sheet assembly |
| 4681301040 | OIL FEED.HOUSG. | Oil feed housing that directs pressurized fluid from the pump shaft |
Frequently Asked Questions
Q: How do I know if my ZF WG190 needs a new pump shaft?
A: Measure the shaft spline wear using a go/no-go gauge. If the spline depth is less than 80% of original, or if you detect more than 0.10 mm radial play at the bearing journal, replacement is required. Always inspect the mating HOUS.FRONT SECT bore for scoring during the same service interval.
Q: Can I install this shaft without removing the transmission from the vehicle?
A: Yes, on most WG-series units the pump shaft is accessible after removing the pump cover and the FIXING PLATE. However, you must drain the transmission fluid and clean the SCREEN SHEET to prevent contamination of the new shaft.
Q: What torque specification applies to the pump shaft retaining hardware?
A: The CAP SCREW for the fixing plate should be tightened to 45 Nm (33 ft-lbs) using a thread-locking compound. Always replace the CYLINDRICAL PIN if it shows any deformation.
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ZF 4657.354.003 PUMP SHAFT – Shaft RFQ Support
PartsZF helps B2B buyers source ZF 4657.354.003 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 4657.354.003 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Documentation reference: 4657023003
- Documentation reference: 4657024110
- Documentation reference: 4657054061
- 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 | 4657.354.003 |
|---|---|
| Normalized SKU | 4657354003 |
| Part name | PUMP 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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- ZF 4657.303.043 OUTPUT SHAFT
