Overview
The ZF 4699.808.041 GK16 is a precision-engineered OEM genuine part designed for the clutch pack assembly within heavy-duty ZF powershift transmissions. This component functions as a critical friction element, managing torque transfer and gear engagement in demanding construction machinery applications. Positioned within the rotating clutch drum, the GK16 interacts directly with steel separator plates to ensure smooth shifting under high load. The SKU 4699.808.041 is manufactured to exacting OEM tolerances, guaranteeing consistent hydraulic pressure distribution and minimal drag during disengagement. For optimal sealing integrity, this part is frequently installed alongside the 4699101093 HOUSING and the 4699301175 HOUSING, which provide structural support and fluid channeling within the transmission casing.
Symptoms of Failure
- Delayed or harsh gear engagement: When the GK16 wears, clutch pack clearance increases, causing noticeable lag or jarring shifts during forward-reverse direction changes in wheel loaders.
- Low transmission oil pressure: Worn friction material can clog internal passages, leading to pressure drops that trigger warning codes on construction machinery dashboards.
- Metallic debris in oil filter: Advanced degradation of the friction lining releases copper-colored particles into the hydraulic circuit, often discovered during routine maintenance of ZF WG-series transmissions.
- Overheating during continuous operation: Slipping clutch packs generate excessive heat, which may cause the 0634303936 O-RING to harden and fail, resulting in external oil leaks near the bell housing.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4699.808.041 (GK16) |
| Material | Sintered bronze friction lining on steel core |
| Outer Diameter | 180 mm (7.09 in) |
| Inner Diameter | 130 mm (5.12 in) |
| Thickness | 3.5 mm (0.138 in) |
| Weight | 0.45 kg (1.0 lb) |
| OEM Reference | ZF 4699.808.041 |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This GK16 friction plate is engineered for ZF powershift transmissions commonly used in construction machinery, including wheel loaders, telehandlers, and excavators. It is a direct fit for the following ZF transmission models: WG180, WG200, WG210, and WG250 series. The part also integrates with the 4699301041 COVER, which seals the clutch drum assembly and prevents contamination. Always verify the clutch pack stack height using the appropriate snap rings (0630513203 SNAP RING and 0630513073 SNAP RING) to maintain correct end-play tolerances during rebuilds.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699101093 | HOUSING | Encloses clutch drum and directs oil flow |
| 4699301175 | HOUSING | Supports planetary gearset and bearing preload |
| 4699301041 | COVER | Seals clutch pack and retains hydraulic pressure |
| 0634303936 | O-RING | Prevents oil leakage between housing and cover |
| 0630513203 | SNAP RING | Secures clutch pack axial position |
| 0750110302 | SHAFT SEAL | Prevents fluid migration along rotating shaft |
| 0630513073 | SNAP RING | Retains piston assembly within clutch drum |
| 0501319149 | SCREW PLUG | Seals hydraulic test ports on transmission case |
| 0636302022 | SCREW PLUG | Closes oil gallery access holes |
| 0634801038 | SEALING RING | Provides static seal between mating flanges |
