Overview
The ZF 4108.206.071 PLANET CARRIER is a critical rotating assembly within the planetary gear set of ZF heavy-duty transmissions. This OEM genuine part serves as the structural hub that houses the planetary gears, pins, and needle bearings, transferring torque from the sun gear to the ring gear under extreme loads. Located in the main drive section of the transmission, the planet carrier ensures smooth power distribution and gear ratio changes. The SKU 4108.206.071 is precision-machined to OEM tolerances, making it essential for restoring full drivetrain integrity in construction machinery such as wheel loaders, graders, and dump trucks.
Symptoms of Failure
- Metallic grinding or whining noise from the transmission housing — Worn planet carrier bores or cracked carrier arms allow planetary gears to misalign, producing audible metal-on-metal contact during acceleration or deceleration.
- Intermittent gear slipping or loss of drive in forward/reverse — A fatigued planet carrier can cause uneven gear loading, leading to sudden power loss under heavy load, especially in low-range gears.
- Visible metal debris in transmission oil or on magnetic drain plugs — Spalling or pitting on the carrier’s bearing surfaces generates ferrous particles that circulate through the system, accelerating wear on the 4108101031: HOUSING and other internal components.
- Excessive axial play or vibration at the output shaft — A cracked or distorted planet carrier allows the planetary gear set to shift out of alignment, causing driveline shudder and premature failure of the 4108303155: HOUSING.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4108.206.071 |
| Material | High-strength alloy steel (case-hardened) |
| Weight | Approx. 8.2 kg (18.1 lbs) |
| Outer Diameter | 210 mm |
| Center Bore Diameter | 45 mm |
| Number of Planet Gear Pockets | 4 |
| OEM Reference | ZF 4108.206.071 |
| Surface Treatment | Black oxide / phosphate coating |
Compatibility
This planet carrier is designed for use in ZF WG-series and ERG-series powershift transmissions commonly found in construction machinery. Compatible models include WG180, WG200, WG210, and ERG180 series. It also integrates with intermediate gearbox assemblies such as the 4108108019: INTERM.GEARBOX. Always verify your transmission serial number before installation.
Installation Notes
When replacing the planet carrier, always inspect and replace associated sealing components. Install a new 0636302015: SCREW PLUG and 0630361037: SEALING CAP to prevent oil leaks. Additionally, check the condition of the 0634801165: SEALING RING and 0631311009: GROOVED STUD for proper torque retention.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4108101031 | HOUSING | Encloses planetary gear set and supports carrier bearings |
| 4108303155 | HOUSING | Rear housing for output shaft and oil distribution |
| 0636302015 | SCREW PLUG | Seals oil passages in the carrier assembly |
| 0630361037 | SEALING CAP | Prevents contamination at carrier bore openings |
| 0730361010 | SEALING CAP | Alternate cap for pressure-side sealing |
| 0736305007 | SCREW PLUG | High-torque plug for drain or fill ports |
| 0634801165 | SEALING RING | Provides static seal between carrier and housing |
| 0730365280 | TYPE PLATE | Identification plate for transmission model |
| 0631311009 | GROOVED STUD | Locating pin for precise carrier alignment |
| 4108108019 | INTERM.GEARBOX | Intermediate gearbox assembly for torque split |
