Overview
The ZF 4657.302.007 INPUT GEAR is a critical drivetrain component engineered specifically for the WG190 and WG210 series transmissions. This OEM genuine part serves as the primary power intake point, transferring rotational force from the engine directly into the transmission’s planetary gear set. Positioned at the front of the main shaft assembly, the input gear (SKU: 4657.302.007) must withstand high torque loads and constant meshing with the clutch hub. It is housed securely within the TRANSMISSION HOUSING and works in conjunction with the HOUS.FRONT SECT to maintain precise gear alignment. Replacing a worn input gear with this genuine ZF unit restores factory-spec power delivery and prevents cascading damage to downstream components.
Symptoms of Failure
- Whining or grinding noise during acceleration: Worn input gear teeth produce a distinct high-pitched whine that intensifies under load, often mistaken for bearing noise.
- Delayed engagement or gear slipping: As the input gear loses tooth profile integrity, the transmission hesitates when shifting from neutral to drive or reverse, causing intermittent power loss.
- Metallic debris in transmission fluid: Flaking or chipped gear teeth contaminate the oil, visible as silver particles on the dipstick or drain plug magnet.
- Vibration through the shift lever: Excessive gear wear creates rotational imbalance, transmitting noticeable shuddering through the chassis at highway speeds.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.302.007 |
| Material | Case-hardened alloy steel (20MnCr5) |
| Tooth Count | 23 teeth |
| Outside Diameter | 112 mm |
| Overall Length | 85 mm |
| Spline Bore Diameter | 38 mm |
| Weight | 1.85 kg |
| OEM Reference | ZF 4657.302.007 |
| Heat Treatment | Carburized & quenched (58-62 HRC) |
Compatibility
This input gear is engineered for ZF’s WG-series heavy-duty transmissions. It is a direct fit for the WG190 and WG210 models, and is also compatible with the WG180 and WG200 series when used with the correct HOUSING REAR PART and CYLINDRICAL PIN for alignment. Always verify your transmission serial number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101031 | TRANSMISSION HOUSING | Encloses and supports all internal gear assemblies |
| 4657201027 | HOUS.FRONT SECT | Front section housing for input shaft bearing support |
| 4657201020 | HOUSING REAR PART | Rear housing section for output shaft alignment |
| 0631306792 | CYLINDRICAL PIN | Precision dowel pin for housing alignment |
| 0636100801 | CAP SCREW | M10 fastener for securing housing sections |
| 4656301148 | FIXING PLATE | Locking plate for gear retention |
| 4657301032 | SCREEN SHEET | Fine mesh oil strainer (version A) |
| 4657301033 | SCREEN SHEET | Fine mesh oil strainer (version B) |
| 0636100803 | CAP SCREW | M12 fastener for gear retaining plate |
| 4681301040 | OIL FEED.HOUSG. | Lubrication channel housing for input gear |
Frequently Asked Questions
Q: Can I install the 4657.302.007 input gear without replacing the mating clutch hub?
It is strongly recommended to inspect the clutch hub splines for wear. A worn hub will rapidly damage a new input gear. Replace both if any galling or step wear is visible.
Q: What torque specification should I use for the retaining nut on this input gear?
ZF specifies 280 Nm (207 ft-lbs) for the input shaft retaining nut. Always use a new CAP SCREW and apply thread locker during reassembly.
Q: Does this gear require a break-in period after installation?
Yes. Run the transmission at low load for the first 50 operating hours, then perform a full oil and filter change to remove initial wear particles.
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ZF 4657.302.007 INPUT GEAR – Gear RFQ Support
PartsZF helps B2B buyers source ZF 4657.302.007 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 4657.302.007 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Documentation reference: 4657024018
- Documentation reference: 4657024024
- Documentation reference: 4657024026
- Documentation reference: 4657024027
- Illustration section: INPUT
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 | 4657.302.007 |
|---|---|
| Normalized SKU | 4657302007 |
| Part name | INPUT GEAR |
| Product category | gear |
| 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.
Related Parts
- ZF 4646.302.128 HELICAL GEAR
- ZF 4143.316.088 PINION
- ZF 4657.354.044 OUTPUT GEAR
- ZF 4644.306.326 GEAR SHIFT HOUSING
- ZF 4644.252.019 SPUR GEAR
