Overview
The ZF 0635.470.025 CYLINDER ROLLER is a precision-engineered bearing element specifically designed for the WG 65 Series transmission. This OEM genuine part functions as a critical load-bearing component within the planetary gear set, reducing rotational friction and supporting radial forces during torque transfer. Installed directly inside the 4616101059: TRANSMISSION HOUSING, this cylinder roller ensures smooth gear engagement and consistent power delivery. The SKU 0635.470.025 is manufactured to ZF’s exacting tolerances, making it an essential replacement for maintaining drivetrain integrity in heavy-duty industrial applications.
Symptoms of Failure
- Audible grinding or whining noise during gear shifts — Worn cylinder rollers create metal-on-metal contact, producing a distinct high-pitched sound that intensifies under load.
- Transmission slipping under heavy torque — Degraded rollers fail to maintain proper gear alignment, causing intermittent power loss during acceleration or uphill operation.
- Metallic debris in transmission fluid — Spalling or pitting of the roller surface releases fine metal particles into the oil, often visible during routine fluid changes.
- Vibration through the gearshift lever or chassis — Uneven roller wear leads to axial play in the gear set, transmitting noticeable oscillations through the driveline.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 0635.470.025 |
| Product Type | Cylinder Roller |
| Material | Case-hardened bearing steel (DIN 1.3505) |
| Outer Diameter | 25 mm |
| Length | 30 mm |
| Weight | 0.12 kg |
| OEM Reference | ZF 0635.470.025 |
| Hardness | HRC 58-62 |
| Surface Finish | Ground, Ra ≤ 0.2 µm |
Compatibility
This cylinder roller is a core component of the ZF WG 65 Series transmission. Based on its design and dimensional profile, it is also compatible with the following ZF transmission models: WG 65, WG 80, WG 120, WG 180, and WG 200. Always verify fitment by cross-referencing your transmission’s serial number with the SKU 0635.470.025. During installation, ensure the roller is properly seated and secured using the 0636011038: HEXAGON SCREW, 0636011118: HEXAGON SCREW, and 0636016015: HEXAGON SCREW to maintain correct preload and alignment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101059 | TRANSMISSION HOUSING | Encloses and supports gear train components |
| 0636011038 | HEXAGON SCREW | Secures housing and bearing assemblies |
| 0636011118 | HEXAGON SCREW | Fastens planetary gear carrier |
| 0636016015 | HEXAGON SCREW | Locks roller retention plate |
| 0631306085 | CYLINDRICAL PIN | Aligns roller cage within gear set |
| 0634313118 | O-RING | Seals oil passages around roller assembly |
| 0636304019 | SCREW PLUG | Closes inspection port for roller access |
| 0634801152 | SEALING RING | Prevents fluid leakage at roller shaft interface |
| 0732611049 | FILTER INSERT | Captures debris from roller wear particles |
| 0634303718 | O-RING | Provides secondary seal on roller housing cover |
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