Overview
The ZF 4699.805.036 GK30 is a precision-engineered OEM genuine part designed for the internal clutch and gear assembly of heavy-duty construction machinery transmissions. This component functions as a critical interface within the planetary gear set, managing torque distribution and rotational engagement under extreme load conditions. As a direct replacement for the original factory-installed unit, the SKU 4699.805.036 ensures exact dimensional tolerances and material hardness required for long service intervals in excavators, wheel loaders, and graders. When paired with the 4699005032: GK30 assembly, it completes the hydraulic-mechanical connection that drives forward and reverse motion.
Symptoms of Failure
- Erratic gear engagement or delayed shifting – When the 4699.805.036 wears, operators may notice a hesitation or clunk when shifting between forward and reverse, particularly under load.
- Transmission fluid contamination with metallic debris – Internal wear of this part produces fine steel particles in the oil, visible during routine filter inspections or magnetic drain plug checks.
- Audible whining or grinding from the transmission housing – A high-pitched noise during acceleration or deceleration indicates bearing surface degradation on the GK30 component.
- Intermittent loss of power to the wheels – Slipping under heavy load, especially on inclines, suggests the part is no longer maintaining proper clamping force within the clutch pack.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4699.805.036 |
| Designation | GK30 (Clutch/Gear Assembly) |
| Material | Case-hardened alloy steel (16MnCr5 equivalent) |
| Outer Diameter | 180 mm |
| Inner Diameter | 95 mm |
| Height | 42 mm |
| Weight | 2.8 kg |
| OEM Reference | ZF 4699.805.036 |
| Surface Treatment | Phosphate coating + oil impregnation |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This genuine ZF part is engineered for the following transmission models commonly found in construction machinery: WG180, WG200, WG211, and WG240 series. It also fits select variants of the Ecomat 4HP and 6HP off-highway transmissions used in articulated dump trucks and crawler dozers. The 4699.805.036 directly interfaces with the 4699101018: HOUSING and the 4699102051: INPUT shaft assembly, while the 4699103012: OUTPUT flange must be inspected for wear during replacement. Always verify transmission serial number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699005032 | GK30 | Complete clutch/gear assembly for torque transfer |
| 4699101018 | HOUSING | Transmission casing that encloses the gear set |
| 4699102051 | INPUT | Input shaft connecting engine to transmission |
| 4699103012 | OUTPUT | Output flange transferring power to driveline |
| 4699105119 | ASSEMBLY PARTS | Hardware kit for mounting and alignment |
| 4699301051 | HOUSING | Secondary housing for clutch pack support |
| 4699301054 | HOUSING COVER | Sealing cover for the transmission housing |
| 4699301055 | COVER | Access cover for inspection and maintenance |
| 4699301014 | THREAD PROTECTIVE SHIELD | Thread guard for bolt holes during assembly |
| 0634303996 | O-RING | Hydraulic seal preventing fluid leakage |
