Troubleshooting
There are two potential leak paths on an oil seal, i.e. between the outside diameter of the Oil Seal and the housing (static), and between the sealing lip and the shaft (dynamic)In the table below the causes are listed, with a few recommendations to prevent these problems.
| Symptoms | Oorzaak |
Remedie |
|---|---|---|
| Oil Seal rotates with the shaft | Outside diameter is smaller than the housing diameter | Replace the Oil Seal, choose the right size |
| Oil Seal is moving in an axial direction on the shaft | Outside diameter is smaller than the housing diameter |
Replace the Oil Seal, choose the right size |
| Due to excess pressure the Oil Seal is moving axially | ||
| The mounted Oil Seal is deformed | Inside diameter of the Oil Seal is too small | Control the size of the shaft |
| The case of the Oil Seal is deformed | Wrong installation tools has been used | Use the right tools |
| Damaged surface of the Oil Seal | The finishing has not been executed properly | Control the roughness of the housing and the presence of a chamfer Clean all parts before assembly |
| Dirt at the in- our outside of the housing | ||
| Damaged sealing lip | Insufficient lubrication Construction limits the transport of the lubrication to the sealing lip |
Lubricate sufficiently Change the construction so that sufficient lubrication reaches the sealing lip |
| Oil Seal not placed concentric with regards to the housing | Centre the seal, use the right tools | |
| Sealing lip has hardened, is worn out and is torn | To high temperature, shaft speed, pressure or insufficient lubrication | Choose the right rubber compound and type of Oil Seal |
| Swollen sealing lip | Incorrect rubber compound | Choose the correct material |
| Scraped sealing lip | Roughness of the shaft is incorrect |
Control roughness |
| Incorrect tools used during assembly | Choose correct assembly tool | |
| Collapsed sealing lip | Incorrect assembly | Lubricate before the assembly |
| Too high pressure | Choose an Oil Seal for high pressures | |
| The flexible part is torn | Too high pressure | Choose an Oil Seal for high pressures |
| Pressure directed at the flexible part | ||
| Garter spring out the groove | Chamfer does not have the correct angle |
Use a mounting sleeve, or make a chamfer on the shaft |
| Take care during the assembly | ||
| Incorrect assembly Grooves not deep enough |
Choose another design, or use a spring with a smaller diameter |