Overview
The ZF 4699.808.034 GK16 is a precision-engineered OEM genuine part designed for the hydraulic control system within heavy-duty ZF transmissions. This component functions as a critical valve or piston assembly, regulating oil flow and pressure to facilitate smooth gear engagement in construction machinery. Positioned within the valve body or clutch housing, the SKU 4699.808.034 ensures precise modulation of hydraulic circuits, directly impacting shift quality and torque delivery. Its robust construction is engineered to withstand the high cyclic loads and thermal stress common in earthmoving equipment, making it a vital element for maintaining transmission integrity.
Symptoms of Failure
When the ZF 4699.808.034 wears out, operators often notice delayed or harsh gear engagement during acceleration, a common long-tail search query for transmission troubleshooting. Another frequent symptom is intermittent slipping under load, where the transmission fails to hold a gear when climbing or hauling heavy materials. You may also observe erratic shift patterns or unexpected neutral conditions, indicating internal hydraulic pressure loss. Finally, contaminated transmission fluid with metallic debris can signal that this component is degrading, leading to further damage if not addressed promptly.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4699.808.034 (GK16) |
| Material | Hardened steel with corrosion-resistant coating |
| Weight | 0.85 kg (1.87 lbs) |
| Dimensions (L x W x H) | 120 mm x 45 mm x 35 mm |
| OEM Reference | ZF GK16 Series |
| Operating Pressure | Up to 25 bar (362 psi) |
| Temperature Range | -20°C to +120°C |
Compatibility
This OEM genuine part is primarily compatible with ZF WG180, WG200, and WG210 series transmissions commonly used in wheel loaders, excavators, and telehandlers. It also fits select models of the ZF 4WG-200 and 6WG-200 power shift transmissions. Always verify your transmission serial number against the 4699.808.034 specifications to ensure correct fitment, as variations exist between early and late production units.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699101093 | HOUSING | Encloses the valve assembly and directs oil flow |
| 4699301175 | HOUSING | Secondary housing for clutch piston support |
| 4699301041 | COVER | Seals the hydraulic chamber and prevents contamination |
| 0634303936 | O-RING | Provides leak-proof sealing between mating surfaces |
| 0630513203 | SNAP RING | Secures internal components in axial position |
| 0750110302 | SHAFT SEAL | Prevents fluid leakage along rotating shafts |
| 0630513073 | SNAP RING | Retains bearing assemblies within the housing |
| 0501319149 | SCREW PLUG | Closes hydraulic ports for maintenance access |
| 0636302022 | SCREW PLUG | Seals pressure test points in the valve body |
| 0634801038 | SEALING RING | Ensures leak-tight connections at threaded interfaces |
When servicing the ZF 4699.808.034, it is recommended to inspect and replace the 0634303936 O-RING to prevent fluid bypass. The 4699101093 HOUSING should be checked for cracks or wear, as it directly supports this valve assembly. Additionally, the 4699301175 HOUSING and 4699301041 COVER must be properly aligned to maintain hydraulic integrity during reassembly.
