Overview
The ZF 0630.513.131 SNAP RING is a critical retaining component engineered specifically for the WG 150 series transmission. This OEM genuine part secures internal assemblies—such as bearing packs and gear clusters—within the main shaft housing, preventing axial displacement under high torque loads. The SKU 0630.513.131 corresponds to a precision-machined circlip that fits into a dedicated groove, ensuring that rotating elements remain locked in their correct positions during operation. Without this snap ring, the transmission’s internal clearances would shift, leading to premature wear of adjacent components like the 4642101047 TRANSMISSION HOUSING or the 4642301207 TRANSMISSION HOUSING.
Symptoms of Failure
- Intermittent gear slippage under load: When the snap ring fatigues, axial play allows gear sets to disengage momentarily, causing a loss of power transfer during acceleration.
- Unusual metallic rattling from the bell housing: A loose snap ring permits bearing cages to shift, producing a distinct clattering noise that intensifies with engine RPM.
- Oil seepage at the shaft seal interface: Excessive movement from a worn snap ring distorts the seal groove, leading to gradual fluid loss around the output shaft.
- Hard shifting or gear clash: Misalignment caused by a failed retaining ring prevents synchronizers from engaging cleanly, resulting in grinding during gear changes.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0630.513.131 |
| Material | Spring steel (DIN 17223) with phosphate coating |
| Inner Diameter | 130.0 mm |
| Cross-Section Thickness | 4.0 mm |
| Weight | 0.045 kg |
| OEM Reference | ZF 0630.513.131 |
| Surface Finish | Black oxide, corrosion-resistant |
Compatibility
This snap ring is primarily designed for the ZF WG 150 series, but it also fits select models in the WG 180 and WG 200 families where the shaft groove diameter matches 130 mm. It is commonly used in off-highway vehicles, construction equipment, and marine transmissions that share the WG platform architecture. For proper installation, always verify the groove width against the snap ring thickness. The ring works in conjunction with the 0730365067 TYPE PLATE for correct identification and the 0631311009 GROOVED STUD for securing adjacent housings.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101047 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4642301207 | TRANSMISSION HOUSING | Secondary housing for clutch pack assembly |
| 0730365067 | TYPE PLATE | Identification tag for transmission model |
| 0631311009 | GROOVED STUD | Alignment dowel for housing mating |
| 4642301168 | SCREEN SHEET | Oil filter mesh for debris protection |
| 4642301169 | SCREEN SHEET | Fine-mesh screen for hydraulic circuit |
| 0636100621 | HEXAGON SCREW | Fastener for cover plate retention |
| 4642301186 | SCREEN SHEET | Coarse strainer for sump pickup |
| 4644106300 | SHIFT SYSTEM | Hydraulic valve body for gear selection |
| 4644306500 | COVER PLATE | Access cover for clutch inspection |
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