Overview
The ZF 4699.001.124 GK10 is a critical OEM genuine component engineered for heavy-duty construction machinery transmissions. This part functions as a precision-machined gear or clutch hub within the planetary gear set, directly influencing torque distribution and shift timing. Positioned in the upper valve body or rotating clutch assembly, the SKU 4699.001.124 ensures seamless hydraulic engagement and disengagement under extreme load conditions. When paired with the 4699101080 HOUSING and 0501329881 HOUSING COVER, this part forms a sealed pressure chamber essential for reliable power transfer in wheel loaders and graders.
Symptoms of Failure
- Delayed or harsh gear engagement: Worn splines or friction surfaces on the 4699.001.124 cause hesitation when shifting from neutral to drive, often accompanied by a loud clunk.
- Intermittent transmission slippage under load: As the part loses its dimensional tolerance, hydraulic pressure bleeds past, resulting in RPM flare during uphill climbs or heavy digging.
- Metallic debris in transmission oil: Fractured teeth or spalling on the GK10 component generate fine steel particles visible during oil changes, signaling imminent failure.
- Oil leaks around the clutch housing: A worn or misaligned 4699.001.124 can distort the 0634306309 O-RING, leading to external seepage at the housing joint.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4699.001.124 (GK10) |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Outer Diameter | 185 mm (7.28 in) |
| Inner Diameter | 95 mm (3.74 in) |
| Thickness | 32 mm (1.26 in) |
| Weight | 2.4 kg (5.3 lbs) |
| Surface Finish | Ground & phosphate-coated |
| Hardness | 58-62 HRC |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This OEM genuine part is designed for ZF WG series powershift transmissions commonly found in construction machinery. It is a direct fit for the WG180, WG200, and WG211 models, as well as the 4WG-200 and 6WG-200 variants. The 4699.001.124 also integrates with older 3WG-171 and 5WG-180 units when used alongside the 0630513065 SNAP RING for axial retention. Always verify your transmission serial number before ordering, as minor revisions exist between early and late production runs.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699101080 | HOUSING | Encloses the clutch pack and directs oil flow |
| 0501329881 | HOUSING COVER | Seals the housing and supports the piston bore |
| 0630513065 | SNAP RING | Retains the GK10 gear within the housing groove |
| 0634306309 | O-RING | Prevents hydraulic fluid bypass at the cover interface |
| 0637885612 | BREATHER | Equalizes internal pressure and vents moisture |
| 0501319149 | SCREW PLUG | Seals test ports and drain passages |
| 0636302022 | SCREW PLUG | Magnetic plug for ferrous debris collection |
| 0634801038 | SEALING RING | Copper washer for high-pressure sealing |
| 0730365801 | TYPE PLATE | Identification label with transmission data |
| 4699102154 | INPUT | Input shaft coupling to the torque converter |
