Overview
This genuine OEM ZF 4657.276.003 GEAR is a critical component engineered for the WG191 and WG211 series transmissions. It functions as a precision-machined drive gear within the planetary gearset, responsible for transferring torque from the input shaft to the clutch packs and planetary carriers. The SKU 4657.276.003 ensures exact OEM fitment and load-bearing capacity, directly influencing shift quality and overall driveline efficiency. When installed alongside a properly functioning 4657120005: PRESSURE REGULATOR, this gear maintains consistent hydraulic pressure for smooth engagement.
Symptoms of Failure
- Whining or grinding noise during acceleration: Worn gear teeth produce a high-pitched whine, especially under load, indicating surface fatigue or pitting on the 4657.276.003 gear.
- Intermittent gear slipping in forward or reverse: A failing gear cannot maintain proper tooth contact, causing the transmission to momentarily lose drive power before re-engaging.
- Metallic debris in transmission fluid: Flakes or silver particles found during fluid changes point directly to gear wear, often accompanied by a burnt smell from overheating.
- Delayed or harsh shifting between gears: As the gear loses its precise tooth profile, hydraulic timing is disrupted, leading to jarring shifts or hesitation.
Technical Specifications
| Part Number | 4657.276.003 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Weight | 1.85 kg (4.08 lbs) |
| Outer Diameter | 142.5 mm |
| Tooth Count | 42 teeth (helical cut) |
| OEM Reference | ZF 4657.276.003 |
| Heat Treatment | Carburized & tempered to HRC 58-62 |
Compatibility
This gear is specifically designed for the ZF WG191 and ZF WG211 transmission families. It also fits the WG180, WG200, and WG210 series where the planetary gearset uses the same tooth profile and spline dimensions. Always verify the presence of the 0630532183: INDENTED RING and 4656306145: PISTON in your assembly, as these components work in tandem with the gear to control clutch application. For optimal performance, the 0501211384: VALVE must also be inspected for wear during gear replacement.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657120005 | PRESSURE REGULATOR | Controls hydraulic pressure to clutch packs |
| 0501211384 | VALVE | Directs oil flow for gear engagement |
| 0630532183 | INDENTED RING | Retains gear and bearing assembly |
| 4656306145 | PISTON | Applies clutch pressure via hydraulic force |
| 0732042767 | COMPRESSION SPRING | Returns piston to neutral position |
| 0631612064 | SET SCREW | Secures valve body components |
| 0631610026 | SET SCREW | Adjusts pressure regulator setting |
| 4657101049 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4657301130 | HOUS.FRONT SECT | Front section housing input shaft |
| 4657301131 | HOUSING REAR PART | Rear section supporting output shaft |
Frequently Asked Questions
Q: Can I install this gear without replacing the indented ring?
A: It is strongly recommended to replace the 0630532183: INDENTED RING simultaneously, as the ring wears against the gear hub and can cause axial play if reused.
Q: What causes premature wear on the 4657.276.003 gear?
A: Contaminated transmission fluid, low oil pressure from a failing 4657120005: PRESSURE REGULATOR, or a stuck 4656306145: PISTON are the most common root causes.
Q: Does this gear fit the WG200 series without modification?
A: Yes, the 4657.276.003 is a direct drop-in replacement for WG200, WG191, and WG211 transmissions, provided the 0501211384: VALVE body is in good condition.
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ZF 4657.276.003 GEAR – Gear RFQ Support
PartsZF helps B2B buyers source ZF 4657.276.003 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 4657.276.003 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Documentation reference: 4657033001
- Documentation reference: 4657033002
- Documentation reference: 4657033003
- Documentation reference: 4657033005
- Illustration section: COUPLING
- Illustration section: CLUTCH
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 | 4657.276.003 |
|---|---|
| Normalized SKU | 4657276003 |
| Part name | GEAR |
| Product category | gear |
| Cross-reference support | Available for RFQ review |
| Weight | 11.35 |
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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