Overview
The ZF 4651.006.017 6 WG 100(500) Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway applications. This assembly integrates the full gear train, clutch packs, and hydraulic control system into a single, ready-to-install package. As the core power transfer component in the WG 100 Series, it replaces worn or failed assemblies to restore original performance. The SKU 4651.006.017 is critical for ensuring precise gear engagement and torque management in construction, mining, and agricultural machinery. This unit sits directly between the engine and the driveline, managing all forward and reverse speeds through its six-speed powershift configuration.
Symptoms of Failure
- Delayed or harsh shifting under load: When the 4651.006.017 assembly wears, internal clutch pack clearances increase, causing noticeable hesitation or jerking during gear changes, especially when moving heavy loads uphill.
- Transmission fluid contamination with metal particles: Worn bearings or gear teeth within the assembly shed debris into the oil, visible as metallic glitter on the dipstick or in the filter. This often accompanies a burnt smell from overheated friction material.
- Intermittent loss of drive in specific gears: A failing assembly may lose hydraulic pressure to certain clutches, resulting in the machine refusing to move in forward or reverse gears while the engine revs freely. This symptom is common in high-hour units.
- External oil leaks from housing joints: Cracks or fatigue in the assembly housing allow transmission fluid to weep around the bell housing or output flange, leading to low fluid levels and eventual overheating.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4651.006.017 |
| Assembly Type | 6 WG 100(500) Powershift |
| Weight (estimated) | 185 kg (408 lbs) |
| Overall Length | 620 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Housing Material | Cast Iron (GGG-40) |
| OEM Reference | ZF 4651.006.017 |
| Max Input Torque | 500 Nm |
| Fluid Capacity | 12.5 liters |
Compatibility
This complete assembly is engineered for the ZF WG 100 Series, specifically the 6 WG 100(500) variant. It is directly compatible with WG 100 models used in telehandlers, wheel loaders, and backhoe loaders from manufacturers like JCB, Manitou, and Caterpillar. While the WG 180 and WG 200 series share similar design principles, the 4651.006.017 is not interchangeable with those larger units due to different clutch pack counts and housing dimensions. Always verify your transmission model tag before ordering.
When installing this assembly, it is essential to inspect and replace adjacent components to ensure a leak-free, durable rebuild. The TRANSMISSION HOUSING (4651101007) provides the structural foundation for the assembly, while the HOUSING (4651301029) seals the rear section. Use a new O-RING (0634303928) on the main cover to prevent fluid bypass. Additionally, the HOUSING (4651301024) supports the output shaft bearing and must be free of cracks.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4651101007 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4651301029 | HOUSING | Rear cover housing for output section |
| 0634303928 | O-RING | Seals housing joint against oil leaks |
| 4651301024 | HOUSING | Output shaft bearing support housing |
| 4651203002 | SCREEN SHEET | Filters debris from hydraulic oil |
| 4651303005 | SCREEN SHEET | Secondary filtration for clutch circuit |
| 0636101032 | CAP SCREW | Fastens housing to transmission case |
| 0630361028 | SEALING CAP | Closes unused hydraulic ports |
| 4475280060 | SCREW PLUG | Seals drain and fill holes |
| 0634303312 | O-RING | Seals screw plug against leakage |
