Overview
The ZF 4616.123.035 PLANETARY DRIVE is a critical torque-multiplying assembly engineered for the WG 65 Series transmission. This OEM genuine component sits within the final drive section, directly transferring rotational force from the gearset to the output shaft. Designed to handle high-load industrial applications, the SKU 4616.123.035 ensures precise gear meshing and minimal power loss. When paired with the 4616105415: OUTPUT, it forms the core of the driveline, converting engine speed into usable wheel torque. The planetary drive’s sun gear, planet gears, and ring gear work in unison to distribute stress evenly, extending the life of the entire transmission assembly.
Symptoms of Failure
When the ZF 4616.123.035 planetary drive wears out, operators often notice specific performance declines. Watch for these failure indicators to avoid costly downtime:
- Gear slipping under load – A worn planetary drive causes intermittent power loss, especially during acceleration or uphill operation. This is a common search query for “ZF WG65 gear slipping repair.”
- Whining or grinding noise from the transmission – Damaged planet gears produce a high-pitched whine or metallic grinding, often misdiagnosed as a bearing issue. Search for “planetary drive noise WG65” to find this part.
- Oil contamination with metallic debris – Flakes or silver particles in the transmission fluid indicate gear tooth wear. This symptom often leads to “ZF transmission metal shavings” queries.
- Reduced torque output or sluggish response – A failing planetary drive cannot multiply torque efficiently, causing the vehicle to feel underpowered. This is frequently searched as “WG65 low torque output fix.”
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4616.123.035 |
| Type | Planetary Drive Assembly |
| Material | Case-hardened alloy steel (gears), aluminum housing |
| Weight | 12.4 kg (27.3 lbs) |
| Outer Diameter | 185 mm |
| Length | 142 mm |
| OEM Reference | ZF 4616.123.035 |
| Torque Capacity | Up to 3,500 Nm |
Compatibility
This genuine ZF planetary drive is primarily designed for the WG 65 Series transmission, but its robust construction makes it suitable for several other ZF models. It directly replaces the original unit in WG180, WG200, and WG250 transmissions used in heavy-duty construction and agricultural equipment. The part integrates seamlessly with the 4616303144: OUTPUT FLANGE and the 4616101094: TRANSMISSION HOUSING. For secure mounting, use the 0636011038: HEXAGON SCREW to fasten the assembly. Always verify your transmission model number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616105415 | OUTPUT | Transfers torque from planetary drive to driveline |
| 4616303144 | OUTPUT FLANGE | Connects output shaft to universal joint |
| 4616101094 | TRANSMISSION HOUSING | Encloses and supports planetary drive assembly |
| 0636011038 | HEXAGON SCREW | Secures planetary drive to housing |
| 0636011118 | HEXAGON SCREW | Fastens output flange to planetary carrier |
| 0636016015 | HEXAGON SCREW | Mounts transmission housing to chassis |
| 0631306085 | CYLINDRICAL PIN | Aligns planetary drive within housing |
| 0634313118 | O-RING | Seals planetary drive against oil leaks |
| 0732611049 | FILTER INSERT | Removes debris from transmission fluid |
| 0634303718 | O-RING | Seals output flange connection |
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