Overview
The ZF 0635.330.039 BALL BEARING is a critical rotating component engineered specifically for the WG 65 Series transmission. This OEM genuine part provides precise radial and axial load support within the gearbox, ensuring smooth shaft rotation and maintaining correct gear alignment. Located within the transmission housing assembly, the SKU 0635.330.039 directly interfaces with the main shaft to reduce friction and dissipate heat during high-torque operations. When paired with a properly sealed TRANSMISSION HOUSING, this bearing maintains the structural integrity required for heavy-duty industrial applications.
Symptoms of Failure
- Whining or grinding noise during gear engagement — A worn 0635.330.039 bearing produces audible metallic sounds, especially under load, indicating raceway pitting or ball deformation.
- Vibration through the shift lever or chassis — Excessive play in the bearing allows shaft wobble, causing noticeable vibration that worsens at higher RPMs.
- Intermittent gear slipping under torque — As the bearing loses its dimensional stability, gear mesh becomes inconsistent, leading to momentary power loss during acceleration.
- Metallic debris in transmission fluid — Flaking or spalling of the bearing surfaces contaminates the oil, often visible during routine filter inspections.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 0635.330.039 |
| Type | Deep Groove Ball Bearing |
| Inner Diameter | 35 mm |
| Outer Diameter | 72 mm |
| Width | 17 mm |
| Material | Chrome Steel (100Cr6) |
| Dynamic Load Rating | 25.5 kN |
| Static Load Rating | 15.3 kN |
| Weight | 0.29 kg |
| OEM Reference | ZF 0635.330.039 |
Compatibility
This ball bearing is a direct fit for the ZF WG 65 Series transmission family. While primarily designed for the WG65 model, the 0635.330.039 also serves as a replacement in the WG180, WG200, and WG250 gearboxes where the same shaft diameter and load specifications apply. Always verify the bearing seat dimensions within your specific transmission housing before installation. During rebuilds, it is common to replace this bearing alongside the HEXAGON SCREW (0636011038) and HEXAGON SCREW (0636011118) that secure the bearing retainer plate. For complete shaft assembly security, the HEXAGON SCREW (0636016015) is also frequently ordered as a matched set.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101059 | TRANSMISSION HOUSING | Encloses and supports all internal gear train components |
| 0636011038 | HEXAGON SCREW | Fastens bearing retainer to housing |
| 0636011118 | HEXAGON SCREW | Secures output flange bearing cap |
| 0636016015 | HEXAGON SCREW | Mounts intermediate shaft bearing support |
| 0631306085 | CYLINDRICAL PIN | Aligns housing halves during assembly |
| 0634313118 | O-RING | Seals bearing bore against oil leakage |
| 0636304019 | SCREW PLUG | Closes oil drain or inspection ports |
| 0634801152 | SEALING RING | Prevents fluid bypass at shaft exits |
| 0732611049 | FILTER INSERT | Captures debris from worn bearings |
| 0634303718 | O-RING | Gaskets the filter housing cover |
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