| OBSERVATION |
CAUSE |
RECOMMENDATION |
| Extensive separation along splice interface. |
Improper pressure and/or temperature during vulcanization. |
Check platens of vulcanizer for temperature and uneven surface. Use pad between belt and vulcanizer. |
| Improper or aged cements and tie gum |
User proper cements and tie gums |
| Breaks in the top and bottom ply over a butt joint in the ply immediately beneath. |
Excessive flexing. |
Use care in fitting steps and avoid buffling along step lines. |
| Step lines show as an impression in belt covers |
Improper fitting of steps. |
Use care in matching step lines. |
| Excessive tension. |
Reduce tension. |
| Separation at edges along steps. |
Improper pressure. Edges not confined during cure. |
Use edge irons during splicing to confine edges. Seal edges with cement as a temporay repair. |
