Overview
The ZF 4699.801.284 GK10 is a genuine OEM gearset assembly designed for the upper power take-off (PTO) drive within heavy-duty construction machinery transmissions. This SKU, 4699.801.284, functions as the primary reduction stage between the transmission housing and the hydraulic pump drive, ensuring consistent torque delivery for auxiliary systems. As a critical rotating assembly, it interfaces directly with the 4699001204: GK10 clutch pack to engage and disengage power flow. The part is housed within the 4699101095: HOUSING, which provides structural support and oil distribution channels. When installed, this gearset converts high-speed input from the 4699102154: INPUT shaft into the correct rotational speed for the 4699103067: OUTPUT flange, making it indispensable for wheel loaders and excavators requiring constant hydraulic flow.
Symptoms of Failure
- Intermittent hydraulic pump stall under load: Worn gear teeth cause the PTO drive to slip, resulting in sudden loss of hydraulic pressure during digging or lifting cycles.
- Metallic grinding noise from transmission bell housing: Debris from spalling gear surfaces creates a distinct high-pitched whine that intensifies with engine RPM, often misdiagnosed as bearing failure.
- Oil contamination with ferrous particles: Routine magnetic drain plug inspections reveal silver or black metallic sludge, indicating advanced wear on the GK10 gearset teeth or splines.
- Erratic engagement of auxiliary functions: Delayed response from the PTO clutch, accompanied by a momentary drop in transmission oil pressure, signals that the 4699.801.284 gearset is no longer meshing correctly with the 4699302013: DRIVE PINION.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4699.801.284 |
| Designation | GK10 Gearset Assembly |
| Material | Case-hardened 20MnCr5 alloy steel |
| Weight | 4.8 kg (10.6 lbs) |
| Gear Ratio | 1.375:1 (input to output) |
| Tooth Count | 22 teeth (input) / 16 teeth (output) |
| Max Torque Capacity | 850 Nm |
| OEM Reference | ZF 4699.801.284 |
| Sealing Interface | Requires 0634306309: O-RING (sold separately) |
Compatibility
This genuine ZF 4699.801.284 GK10 gearset is engineered for the following transmission families used in construction machinery: ZF WG180, ZF WG200, and ZF WG210 series. It is also compatible with select ZF Ergopower (4WG-200) and ZF Ecolife (6WG-200) transmissions equipped with a rear PTO module. Always verify the housing casting number against the 0769100082: TYPE PLATE to confirm fitment. The gearset is not backward-compatible with pre-2005 WG150 series without replacing the 0501329881: HOUSING COVER and 0637885612: BREATHER assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699001204 | GK10 Clutch Pack | Engages/disengages PTO drive |
| 4699101095 | HOUSING | Encloses gearset and directs oil flow |
| 4699102154 | INPUT Shaft | Transfers torque from transmission |
| 4699103067 | OUTPUT Flange | Connects to hydraulic pump |
| 0501329881 | HOUSING COVER | Seals the gearset chamber |
| 0634306309 | O-RING | Prevents oil leakage at interfaces |
| 0637885612 | BREATHER | Equalizes internal pressure |
| 0769100082 | TYPE PLATE | Identifies transmission model |
| 4699302013 | DRIVE PINION | Meshes with GK10 gearset |
| 4699105042 | TURNTABLE BEARING | Supports output flange rotation |
