Overview
The ZF 4699.808.033 GK16 is a precision-engineered clutch pack assembly designed for heavy-duty construction machinery transmissions. This OEM genuine part sits within the planetary gear set of ZF power shift transmissions, where it manages torque transfer between rotating shafts during gear changes. The SKU 4699.808.033 specifically controls hydraulic pressure distribution to engage and disengage clutches, ensuring smooth power delivery under extreme load conditions. As a critical wear component, this GK16 assembly directly influences shift quality and overall transmission longevity in excavators, wheel loaders, and graders.
Symptoms of Failure
When the ZF 4699.808.033 GK16 begins to fail, operators typically notice delayed gear engagement when shifting from neutral to drive or reverse. A second common symptom is intermittent transmission slipping under heavy load, particularly when climbing grades or lifting. Third, contaminated transmission fluid with metallic particles often appears, indicating clutch plate degradation. Finally, erratic shift patterns or harsh engagement points suggest the GK16 assembly is no longer maintaining proper hydraulic pressure. These issues progressively worsen if the part is not replaced promptly.
Technical Specifications
| Part Number | 4699.808.033 |
| Designation | GK16 Clutch Pack Assembly |
| Outer Diameter | 180 mm (7.09 in) |
| Inner Diameter | 120 mm (4.72 in) |
| Thickness | 42 mm (1.65 in) |
| Material | Sintered Bronze on Steel |
| Weight | 2.8 kg (6.17 lbs) |
| OEM Reference | ZF 4699.808.033 |
Compatibility
This GK16 assembly is engineered for ZF WG180, WG200, and WG250 power shift transmissions commonly used in construction machinery. It also fits select ZF 4WG-200 and 6WG-200 series units found in Caterpillar, Volvo, and Liebherr equipment. Always verify your transmission model suffix before ordering, as minor variations exist between early and late production runs.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699101093 | HOUSING | Encloses clutch pack assembly |
| 4699301175 | HOUSING | Secondary housing for planetary gears |
| 4699301041 | COVER | Seals transmission fluid chamber |
| 0634303936 | O-RING | Prevents hydraulic fluid leaks |
| 0630513203 | SNAP RING | Retains clutch pack in housing |
| 0750110302 | SHAFT SEAL | Prevents oil leakage at shaft |
| 0630513073 | SNAP RING | Secures bearing assembly |
| 0501319149 | SCREW PLUG | Seals hydraulic test ports |
| 0636302022 | SCREW PLUG | Closes oil drain passages |
| 0634801038 | SEALING RING | Prevents fluid bypass between housings |
When replacing the GK16, always inspect the HOUSING (4699101093) for scoring or cracks, as damaged housings accelerate clutch wear. The HOUSING (4699301175) should be checked for warpage at mating surfaces. Install a new O-RING (0634303936) and COVER (4699301041) gasket during reassembly to prevent fluid leaks. These components work together to maintain proper hydraulic pressure within the clutch circuit.
