Overview
The ZF 4657.304.037 Quill Shaft is a precision-machined component engineered specifically for the WG 190 Series transmission. This OEM genuine part serves as the central torque transfer interface within the transmission’s auxiliary drive assembly, connecting the input shaft to the oil pump and PTO gear train. The SKU 4657.304.037 is manufactured to ZF’s exacting tolerances to ensure concentric rotation and minimal backlash under heavy load conditions. When installed alongside the TRANSMISSION HOUSING, this quill shaft provides the necessary rotational support for the front section of the gearset, directly influencing shift quality and overall drivetrain efficiency.
Symptoms of Failure
When the ZF 4657.304.037 quill shaft begins to wear, operators typically notice three distinct failure indicators. First, erratic gear engagement during low-speed maneuvers occurs as the shaft’s splines lose their interference fit with mating components. Second, intermittent oil pump cavitation noise—a high-pitched whine—develops when the quill shaft’s pilot bearing surface becomes scored, reducing hydraulic pressure. Third, visible metallic debris in the transmission fluid signals that the shaft’s hardened surface has begun spalling, often accompanied by a gradual loss of forward drive torque. These symptoms are most pronounced in WG190 units operating under continuous heavy hauling cycles.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4657.304.037 |
| Overall Length | 187.5 mm |
| Outer Diameter (Spline) | 32.0 mm |
| Inner Bore Diameter | 18.0 mm |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Surface Hardness | 58–62 HRC |
| Weight | 0.85 kg |
| OEM Reference | ZF 4657.304.037 |
| Thread Pitch (if applicable) | M10 x 1.5 |
Compatibility
This quill shaft is primarily designed for the ZF WG 190 Series transmission, but it also fits select variants of the WG180 and WG200 models produced between 2008 and 2020. The shaft interfaces directly with the HOUS.FRONT SECT and the HOUSING REAR PART to maintain proper alignment of the planetary gearset. For applications requiring a complete rear seal replacement, the HOUSING REAR SECTION must be inspected concurrently to prevent oil migration. Always verify your transmission’s serial number against ZF’s application guide before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101078 | TRANSMISSION HOUSING | Main structural casing for gearset and shafts |
| 4657201166 | HOUS.FRONT SECT | Front section housing for input shaft support |
| 4657201168 | HOUSING REAR PART | Rear housing section for output shaft alignment |
| 4657298101 | HOUSING REAR SECTION | Complete rear housing assembly with bearing seats |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing-to-housing doweling |
| 0636100801 | CAP SCREW | M10 bolt for securing front housing section |
| 4656301148 | FIXING PLATE | Locking plate for quill shaft retention |
| 4657301032 | SCREEN SHEET | Fine mesh filter for oil pump inlet |
| 4657301033 | SCREEN SHEET | Coarse mesh filter for return line |
| 0636100803 | CAP SCREW | M12 bolt for rear housing attachment |
Frequently Asked Questions
Q: Can the 4657.304.037 quill shaft be reused after a transmission overhaul?
A: No. ZF recommends replacing this quill shaft with every major transmission rebuild because the spline surfaces wear asymmetrically over time. Reusing a worn shaft accelerates damage to the mating pump gear and front housing bore.
Q: What torque specification should I use when installing the fixing plate (4656301148) onto this quill shaft?
A: The fixing plate bolts should be torqued to 45 Nm (33 ft-lb) using a thread-locking compound. Always consult the ZF WG190 service manual for the exact sequence, as the HOUS.FRONT SECT must be aligned within 0.05 mm runout.
Q: Will this part work with a ZF WG180 transmission from 2015?
A: Yes, the 4657.304.037 is cross-compatible with WG180 models that use the same 32 mm spline interface. However, you must verify that the HOUSING REAR SECTION on your unit matches the WG190 pattern, as some early WG180 units used a different pilot diameter.
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ZF 4657.304.037 QUILL SHAFT – Shaft RFQ Support
PartsZF helps B2B buyers source ZF 4657.304.037 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 4657.304.037 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Documentation reference: 4657024121
- Documentation reference available for RFQ review
- Illustration section: AXLE DISCONNECTION
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 | 4657.304.037 |
|---|---|
| Normalized SKU | 4657304037 |
| Part name | QUILL 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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