Overview
The ZF 4657.302.004 INPUT GEAR is a precision-machined component designed specifically for the WG190, WG210, and WG230 series transmissions. This genuine OEM part serves as the primary torque input interface, transferring rotational force from the engine to the transmission’s planetary gearset. The SKU 4657.302.004 is engineered to exact ZF tolerances, ensuring seamless meshing with the countershaft and reducing drivetrain noise. It sits directly behind the bell housing and is secured within the TRANSMISSION HOUSING, where it aligns with the HOUS.FRONT SECT to maintain proper gear lash.
Symptoms of Failure
- Whining or grinding noise during acceleration — Worn input gear teeth create a high-pitched metallic sound, especially under load, indicating the need for immediate replacement of the 4657.302.004.
- Delayed engagement or gear slipping — A damaged input gear can cause the transmission to hesitate before engaging, or slip out of gear during operation, a common long-tail search query for WG190 owners.
- Metal particles in transmission fluid — Flaking or pitting on the input gear surface introduces ferrous debris into the oil, which can clog the SCREEN SHEET and damage downstream components.
- Vibration at the shift lever — Excessive wear on the input gear splines or bearing surface transmits vibration through the driveline, often felt in the cab during low-speed maneuvers.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.302.004 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Weight | 2.85 kg (6.28 lbs) |
| Outside Diameter | 142 mm |
| Tooth Count | 28 teeth, helical profile |
| OEM Reference | ZF 4657.302.004 |
| Heat Treatment | Carburized and tempered to HRC 58-62 |
Compatibility
This genuine ZF input gear is engineered for the WG180, WG190, WG200, WG210, and WG230 transmission families. It is a direct replacement for units built between 2005 and 2023. The 4657.302.004 interfaces with the HOUSING REAR PART and is secured using a CYLINDRICAL PIN for precise alignment. Always verify your transmission serial number against ZF’s parts catalog before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101033 | TRANSMISSION HOUSING | Encloses and supports the gear train assembly |
| 4657201027 | HOUS.FRONT SECT | Front section housing that aligns the input shaft |
| 4657201012 | HOUSING REAR PART | Rear housing section that supports output bearings |
| 0631306792 | CYLINDRICAL PIN | Locating pin for precise gear alignment |
| 0636100801 | CAP SCREW | Fastener for securing housing sections |
| 4656301148 | FIXING PLATE | Retains input gear axial position |
| 4657301032 | SCREEN SHEET | Oil filter screen for transmission sump |
| 4657301033 | SCREEN SHEET | Secondary oil filter screen (fine mesh) |
| 0636100803 | CAP SCREW | High-tensile bolt for bearing cap retention |
| 4681301040 | OIL FEED.HOUSG. | Lubrication channel housing for gear cooling |
Frequently Asked Questions
Q: How do I know if the 4657.302.004 input gear is compatible with my WG190 transmission?
A: Check the transmission model tag located on the left side of the TRANSMISSION HOUSING. If your unit is a WG190, WG210, or WG230 series built after 2005, this gear is a direct fit. Always confirm the tooth count and spline profile before installation.
Q: Can I replace the input gear without removing the entire transmission?
A: Partial disassembly is required. You must remove the HOUS.FRONT SECT and the CYLINDRICAL PIN to access the input gear. We recommend replacing the FIXING PLATE simultaneously to ensure proper retention.
Q: What torque specification should I use for the cap screws when reinstalling?
A: For the CAP SCREW (0636100801) securing the housing, use 85 Nm (63 ft-lbs). The CAP SCREW (0636100803) for the bearing cap requires 45 Nm (33 ft-lbs). Always apply thread locker to prevent loosening.
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Phone: +86 158 2286 3467 |
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ZF 4657.302.004 INPUT GEAR – Gear RFQ Support
PartsZF helps B2B buyers source ZF 4657.302.004 INPUT GEAR with fast RFQ support, expert part-number lookup, documentation review, and export coordination. This gear 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 4657.302.004 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Documentation reference: 4657024048
- Documentation reference: 4657024112
- Documentation reference: 4657024145
- Documentation reference: 4657024146
- Illustration section: INPUT
Cross Reference Support
- Cross-reference record available for RFQ review.
Specification Snapshot
| ZF part number | 4657.302.004 |
|---|---|
| Normalized SKU | 4657302004 |
| Part name | INPUT GEAR |
| Product category | gear |
| 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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