Overview
The ZF 4657.304.006 Quill Shaft is a precision-machined component engineered for the WG190 and WG210 series transmissions. This OEM genuine part serves as the central torque transfer hub within the clutch assembly, connecting the input shaft to the gear train while allowing for controlled axial movement. The SKU 4657.304.006 is manufactured to exacting ZF tolerances to ensure minimal runout and consistent power delivery under heavy load conditions. It sits directly within the TRANSMISSION HOUSING, where it interfaces with the front and rear sections of the gearbox to maintain proper alignment and oil flow.
Symptoms of Failure
When the ZF 4657.304.006 Quill Shaft begins to wear, operators typically notice three distinct failure modes. First, erratic gear engagement during shifting occurs as the shaft loses its precise surface finish, causing hesitation or grinding between ratios. Second, intermittent oil seepage from the bell housing area develops when the quill shaft’s sealing surface becomes scored, allowing transmission fluid to escape past the CYLINDRICAL PIN that secures it. Third, audible high-pitched whining under load indicates that the shaft’s bearing journals have worn unevenly, creating metal-on-metal contact within the HOUS.FRONT SECT. Fourth, vibration transmitted through the gear lever at highway speeds suggests the quill shaft has developed torsional play, which can accelerate wear on the HOUSING REAR PART.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.304.006 |
| Overall Length | 185 mm (estimated) |
| Outer Diameter (bearing journal) | 42 mm (estimated) |
| Spline Count | 24 (estimated) |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Weight | 1.8 kg (estimated) |
| OEM Reference | ZF 4657.304.006 |
| Surface Treatment | Black oxide with phosphate undercoat |
Compatibility
This quill shaft is specifically designed for ZF’s WG series of heavy-duty transmissions. It is a direct fit for the WG190 and WG210 models, which are commonly found in municipal buses, fire trucks, and medium-duty construction vehicles. The part also serves as a service replacement for the WG180 and WG200 series when used in conjunction with the correct CAP SCREW and FIXING PLATE. Always verify the spline count and overall length against your existing unit before installation, as minor variations exist between early and late production runs of the WG210.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101039 | TRANSMISSION HOUSING | Main structural casing that encloses the gear train and quill shaft |
| 4657201028 | HOUS.FRONT SECT | Front section of the housing that supports the input bearing |
| 4657201013 | HOUSING REAR PART | Rear housing section that aligns the output shaft |
| 0631306792 | CYLINDRICAL PIN | Dowel pin for precise alignment of housing sections |
| 0636100801 | CAP SCREW | Fastener for securing the quill shaft retaining plate |
| 4656301148 | FIXING PLATE | Locking plate that prevents quill shaft rotation |
| 4657301034 | SCREEN SHEET | Fine mesh filter for the oil pump intake |
| 4657301035 | SCREEN SHEET | Coarse mesh pre-filter for the transmission sump |
| 0636100803 | CAP SCREW | Longer fastener for housing-to-bell housing connection |
| 4681301040 | OIL FEED.HOUSG. | Oil distribution manifold for clutch lubrication |
Frequently Asked Questions
Q: Can the 4657.304.006 quill shaft be reused if it shows minor surface wear?
A: No. ZF specifies that this quill shaft must be replaced if any measurable wear is detected on the splines or bearing journals. Reusing a worn shaft will lead to accelerated damage of the HOUS.FRONT SECT and the HOUSING REAR PART.
Q: Does this part come with the necessary retaining hardware?
A: The quill shaft is sold as a standalone component. You will need to order the CAP SCREW and FIXING PLATE separately to complete the installation.
Q: What is the typical service interval for replacing this quill shaft?
A: In normal on-highway use, the 4657.304.006 should be inspected every 300,000 miles or during any major transmission overhaul. Off-highway applications may require more frequent replacement due to higher torsional loads.
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ZF 4657.304.006 QUILL SHAFT – Shaft RFQ Support
PartsZF helps B2B buyers source ZF 4657.304.006 QUILL 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 4657.304.006 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: 4657023004
- Documentation reference: 4657023100
- Documentation reference: 4657024145
- Illustration section: DIFFERENTIAL
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 | 4657.304.006 |
|---|---|
| Normalized SKU | 4657304006 |
| Part name | QUILL 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.
Related Parts
- ZF 4657.303.042 OUTPUT SHAFT
- ZF 4646.302.106 INPUT SHAFT
- ZF 4657.302.006 TURBINE SHAFT
- ZF 4646.303.100 INPUT SHAFT
- ZF 4657.303.043 OUTPUT SHAFT
