Overview
The ZF 4695.010.003 GKA is a genuine OEM gear set assembly engineered for heavy-duty performance in construction machinery transmissions. This critical component resides within the planetary gear train, directly influencing torque multiplication and speed reduction in ZF power shift transmissions. The SKU 4695.010.003 is precision-machined to OEM tolerances, ensuring seamless integration with the 4695101002: HOUSING and the 4695102001: INPUT shaft assembly. Without this gear set, the transmission cannot transfer engine power to the final drive, making it a cornerstone of drivetrain reliability in excavators, loaders, and graders.
Symptoms of Failure
- Erratic gear engagement under load: When the 4695.010.003 wears, operators report delayed or harsh shifting during digging or lifting operations, often accompanied by a grinding noise from the transmission housing.
- Metallic debris in transmission fluid: Pitting or chipping of gear teeth generates fine metal particles, which can be detected during routine oil changes. This symptom frequently leads to secondary damage to the 4695301021: HOUSING and adjacent bearings.
- Loss of power in forward gears: A worn gear set causes torque slippage, particularly in lower gear ranges. Operators may notice the machine struggling to maintain speed on inclines or during heavy bucket loads.
- Oil leaks near the clutch pack area: Excessive gear play can distort the 4695301022: COVER, breaking sealing surfaces and causing hydraulic fluid to weep from the transmission sump.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4695.010.003 |
| Designation | GKA (Gear Set, Planetary) |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Weight | 4.2 kg (9.26 lbs) |
| Outer Diameter | 185 mm |
| Tooth Count | 47 (sun gear) / 73 (ring gear) |
| OEM Reference | ZF 4695.010.003 |
| Surface Finish | Shot-peened, phosphate coated |
Compatibility
This genuine ZF gear set is designed for the WG180, WG200, and WG210 series power shift transmissions commonly used in construction machinery. It also fits select variants of the ZF 4WG-200 and 6WG-200 models. The 4695.010.003 is a direct replacement for the first-stage planetary gear set in these units. Always verify your transmission serial number against the OEM parts catalog before ordering. For complete assembly, pair this gear set with the 4695101002: HOUSING and 4695102001: INPUT shaft to ensure proper axial clearance.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4695101002 | HOUSING | Encloses the gear set and supports bearings |
| 4695102001 | INPUT | Transfers torque from engine to planetary gears |
| 4695301021 | HOUSING | Rear housing for clutch pack assembly |
| 4695301022 | COVER | Seals the transmission and guides oil flow |
| 0634801038 | SEALING RING | Prevents fluid bypass between gear stages |
| 4695301023 | SCREW PLUG | Seals hydraulic test ports |
| 4695301024 | SCREW PLUG | Magnetic drain plug for debris collection |
| 0637885612 | BREATHER | Equalizes internal pressure and vents moisture |
| 0636100690 | CAP SCREW | Secures the cover to the housing |
| 0634100309 | O-RING | Provides static seal between mating surfaces |
