Overview
The ZF 4699.301.006 STOP is a critical internal retention component engineered for heavy-duty powershift transmissions used in construction machinery. This OEM genuine part functions as a positive mechanical stop, precisely limiting axial travel of clutch packs and planetary gear sets within the transmission housing. By maintaining exact component clearances, it prevents over-travel that could lead to gear clash or hydraulic pressure loss. The SKU 4699.301.006 is specifically designed to interface with the main housing assembly, ensuring that all rotating elements remain securely positioned under extreme load cycles. This stop component is typically located adjacent to the 4699101002: HOUSING and works in concert with the 4699301188: HOUSING to maintain structural integrity of the transmission core.
Symptoms of Failure
- Transmission gear slipping under load – When the 4699.301.006 stop wears or fractures, clutch packs can shift beyond their designed range, causing intermittent power loss during excavation or grading operations.
- Metallic grinding noise from transmission housing – A worn stop allows planetary gears to contact the 4699301128: COVER, producing a distinct grinding sound that worsens with higher torque demands.
- Hydraulic fluid contamination with metal particles – Degradation of this stop generates fine metallic debris that circulates through the transmission, often detected during routine oil analysis.
- Erratic shift engagement in construction machinery – Operators may experience delayed or harsh shifting as the stop fails to maintain proper clutch clearance, particularly in ZF WG-series transmissions.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4699.301.006 |
| OEM Reference | ZF 4699.301.006 |
| Material | Case-hardened alloy steel (16MnCr5 equivalent) |
| Weight | 0.85 kg (1.87 lbs) |
| Outer Diameter | 68.5 mm |
| Inner Diameter | 32.0 mm |
| Thickness | 12.0 mm |
| Surface Hardness | 58-62 HRC |
| Thread Pitch | M8 x 1.25 (mounting) |
Compatibility
This OEM stop component is primarily utilized in ZF WG180, WG200, and WG210 powershift transmissions commonly installed in wheel loaders, bulldozers, and excavators from manufacturers such as Caterpillar, Volvo, and Liebherr. It also fits select ZF 4WG-200 and 6WG-200 series units used in heavy construction machinery. For proper installation, ensure the 0636015047: HEXAGON SCREW is torqued to factory specifications when securing this stop to the housing assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699101002 | HOUSING | Main transmission housing containing clutch and gear assemblies |
| 4699301188 | HOUSING | Secondary housing section for planetary gear support |
| 4699301128 | COVER | End cover sealing the transmission cavity |
| 0636015047 | HEXAGON SCREW | Fastener for securing stop and housing components |
| 0734307406 | SEALING RING | Prevents oil leakage at housing joints |
| 0501319149 | SCREW PLUG | Seals hydraulic test ports in the housing |
| 0634801038 | SEALING RING | O-ring for cover-to-housing interface |
| 0636101041 | CAP SCREW | M10 fastener for cover attachment |
| 0636101036 | CAP SCREW | M8 fastener for stop retention |
| 0636101032 | CAP SCREW | M6 fastener for auxiliary housing |
