Overview
This genuine OEM ZF 4657.354.020 Pump Shaft is a critical rotating component engineered specifically for the WG190, WG210, and WG230 series transmissions. It transmits torque from the torque converter directly to the hydraulic pump, ensuring consistent oil flow for clutch engagement and gear shifts. The shaft interfaces precisely with the TRANSMISSION HOUSING and the HOUS.FRONT SECT to maintain correct alignment under heavy loads. As a direct OEM replacement, the SKU 4657.354.020 guarantees exact fitment and eliminates the risk of premature pump failure.
Symptoms of Failure
- Erratic or delayed gear engagement: A worn pump shaft cannot maintain adequate hydraulic pressure, causing hesitation when shifting from neutral to drive or reverse.
- Low transmission oil pressure warning: If the shaft splines are stripped or the shaft is scored, the pump loses prime, triggering dash warnings and potential transmission overheating.
- Audible whining or grinding from the bell housing: Excessive play between the pump shaft and the HOUSING REAR PART produces a distinct metallic noise during acceleration.
- Oil leaks near the front pump seal: A wobbling shaft damages the seal lip, allowing ATF to escape past the CYLINDRICAL PIN retention area.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 4657.354.020 |
| OEM Reference | ZF 4657.354.020 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Overall Length | 187 mm (estimated) |
| Shaft Diameter (bearing journal) | 28 mm |
| Spline Count | 14-tooth involute spline |
| Weight | 0.85 kg (1.87 lbs) |
| Surface Finish | Ground and polished, 0.4 ยตm Ra |
Compatibility
This pump shaft is designed for ZF WG and BP series transmissions with a hydraulic pump mounted on the front cover. Confirmed compatible models include: WG180, WG190, WG200, WG210, WG230, BP210, and BP230 series. It also fits certain early-build WG160 units when used with the correct HOUS.FRONT SECT. Always verify the spline engagement depth against your existing shaft before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101039 | TRANSMISSION HOUSING | Main structural case that encloses the gear train and supports the pump shaft. |
| 4657201028 | HOUS.FRONT SECT | Front housing section that aligns the pump shaft and torque converter. |
| 4657201013 | HOUSING REAR PART | Rear housing section that supports the output shaft and planetary sets. |
| 0631306792 | CYLINDRICAL PIN | Dowel pin used for precise alignment between housing sections. |
| 0636100801 | CAP SCREW | M10 fastener securing the pump shaft retaining plate. |
| 4656301148 | FIXING PLATE | Locking plate that prevents axial movement of the pump shaft. |
| 4657301034 | SCREEN SHEET | Fine mesh filter screen for the main oil circuit. |
| 4657301035 | SCREEN SHEET | Secondary filter screen for the torque converter circuit. |
| 0636100803 | CAP SCREW | M8 fastener for the oil pump cover assembly. |
| 4681301040 | OIL FEED.HOUSG. | Oil feed housing that directs pressurized fluid to the clutch packs. |
Frequently Asked Questions
Q: Can I reuse the old CYLINDRICAL PIN when replacing the pump shaft?
A: No. The CYLINDRICAL PIN (0631306792) is a single-use alignment component. Always install a new pin to guarantee proper housing alignment and prevent shaft binding.
Q: Does the 4657.354.020 pump shaft fit the BP 210 series?
A: Yes. The BP 210 and BP 230 series share the same pump shaft geometry. However, you must also inspect the HOUS.FRONT SECT for wear at the bushing bore before installation.
Q: What torque should I apply to the CAP SCREW holding the FIXING PLATE?
A: Tighten the CAP SCREW (0636100801) to 45 Nm (33 ft-lbs) and stake the FIXING PLATE tab over the bolt head to prevent loosening.
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ZF 4657.354.020 PUMP SHAFT – Shaft RFQ Support
PartsZF helps B2B buyers source ZF 4657.354.020 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 4657.354.020 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Documentation reference: 4657023001
- Documentation reference: 4657023002
- Documentation reference: 4657023004
- Documentation reference: 4657023100
- 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 | 4657.354.020 |
|---|---|
| Normalized SKU | 4657354020 |
| Part name | PUMP SHAFT |
| Product category | shaft |
| Cross-reference support | Available for RFQ review |
Image and Documentation Notes
Current product media status: real photo. 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 4646.303.100 INPUT SHAFT
- ZF 4657.303.043 OUTPUT SHAFT
