Overview
The ZF 4108.302.097 PLANET CARRIER is a critical rotating assembly within the planetary gear set of heavy-duty ZF transmissions. This OEM genuine part serves as the structural hub that holds the planetary gears, transmitting torque from the sun gear to the ring gear while managing high axial and radial loads. Located in the main drive section, the planet carrier directly influences gear ratio selection and overall drivetrain efficiency. The SKU 4108.302.097 is precision-machined to factory tolerances, ensuring seamless integration with companion components like the 4108101061: HOUSING and the 4108201156: HOUSING to maintain proper gear alignment and oil circulation.
Symptoms of Failure
When the planet carrier wears out, operators often notice intermittent gear slipping under load—a classic sign of worn carrier pockets or bearing journals. Another common symptom is low-frequency rumbling or clunking noises from the transmission housing during acceleration, indicating excessive play between the carrier and planetary gears. You may also observe metallic debris in the transmission oil filter due to spalling on the carrier’s thrust faces. Finally, erratic shift timing or delayed engagement in forward gears can point to a failing carrier that disrupts hydraulic pressure balance within the valve body.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4108.302.097 |
| Material | High-strength alloy steel (case-hardened) |
| Weight | 4.2 kg (9.3 lbs) |
| Outer Diameter | 185 mm |
| Center Bore | 45 mm |
| Planetary Gear Pockets | 3 (equally spaced) |
| OEM Reference | ZF 4108.302.097 |
Compatibility
This planet carrier is designed for use in ZF WG180, WG200, and WG210 series transmissions commonly found in wheel loaders, graders, and compact excavators. It also fits select 4WG-200 and 6WG-200 power shift models. Always verify your transmission’s serial number before ordering. For complete assembly, pair this carrier with the 4108301304: BEARING COVER to seal the planetary set and the 4108306173: GASKET to prevent oil leaks at the housing interface.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4108101061 | HOUSING | Encloses the planetary gear set and supports the carrier |
| 4108201156 | HOUSING | Secondary housing for clutch pack and oil passages |
| 4108301304 | BEARING COVER | Seals the carrier bearing and retains lubrication |
| 4108306173 | GASKET | Prevents oil leakage between housing and cover |
| 0730365280 | TYPE PLATE | Identifies transmission model and serial number |
| 0631311009 | GROOVED STUD | Secures the housing to the transmission case |
| 4108301339 | INPUT SHAFT | Transfers engine torque to the planetary carrier |
| 0750116277 | BALL BEARING | Supports the input shaft and reduces friction |
| 0630502039 | RETAINING RING | Locks the carrier assembly in place axially |
| 0630000041 | SHIM RING | Adjusts end-play clearance for the planetary set |
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