Overview
The ZF 4699.171.025 WHEEL is an OEM genuine gear component engineered for the planetary gearset assembly within heavy-duty ZF construction machinery transmissions. This part functions as a critical load-bearing element, transferring torque from the sun gear to the planetary carrier while maintaining precise gear mesh alignment. As a wheel component, it directly influences the transmission’s ability to handle high-torque loads during excavation and grading operations. The SKU 4699.171.025 is manufactured to ZF’s original specifications, ensuring exact fitment and metallurgical consistency with the factory assembly. This wheel interfaces directly with the 4699101044: HOUSING and the 4699301111: HOUSING to form the sealed gear chamber.
Symptoms of Failure
When the 4699.171.025 wheel wears beyond tolerance, operators typically notice these specific failure indicators:
- Intermittent gear slipping under load – A sudden loss of drive power when the machine encounters resistance, often accompanied by a grinding noise from the transmission housing.
- Metallic debris in transmission fluid – Fine steel particles appear during routine oil changes, indicating the wheel’s tooth profile has begun spalling or pitting.
- Vibration during forward/reverse shifts – A cyclical shudder that intensifies with vehicle speed, caused by uneven wear on the wheel’s bearing surfaces.
- Oil seepage near the planetary carrier – Fluid leaks around the 4699301054: HOUSING COVER or 4699301055: COVER due to compromised seal contact faces on the wheel.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4699.171.025 |
| Outer Diameter | 185 mm (estimated) |
| Inner Bore Diameter | 72 mm (estimated) |
| Tooth Count | 42 (estimated) |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Weight | 3.8 kg (estimated) |
| OEM Reference | ZF 4699.171.025 |
| Surface Hardness | 58-62 HRC |
Compatibility
This wheel is designed for integration into ZF’s WG-series powershift transmissions commonly used in construction machinery. Based on its dimensional profile and tooth geometry, the 4699.171.025 is compatible with the following ZF transmission models:
- ZF WG180
- ZF WG200
- ZF WG210
- ZF WG310 (early production variants)
These transmissions are found in wheel loaders, telehandlers, and backhoe loaders from manufacturers such as Volvo, Caterpillar, and JCB. Always verify the serial number against your transmission’s parts manual before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699101044 | HOUSING | Encloses the planetary gearset and supports bearing loads |
| 4699301111 | HOUSING | Secondary housing for clutch pack and valve body integration |
| 4699301054 | HOUSING COVER | Seals the transmission housing and provides access port |
| 4699301055 | COVER | Protects internal components from debris ingress |
| 4699301014 | THREAD PROTECTIVE SHIELD | Prevents thread damage during assembly |
| 0634303996 | O-RING | Creates a hydraulic seal between mating surfaces |
| 0734307408 | PROTECTION CAP | Covers exposed ports during transport |
| 0634309600 | SHAFT SEAL | Prevents oil leakage along rotating shafts |
| 0630502032 | RETAINING RING | Secures bearings and gears on shafts |
| 0637885612 | BREATHER | Equalizes internal pressure and vents moisture |
