| • | A damaged or rough pump shaft bearing |
| • | Casting porosity |
| • | Interconnected oil passages |
| • | Damaged machined surfaces |
| • | Foreign material |
| • | Cut seals |
| • | Bent connectors or broken wires |
| • | Cracked or damaged plastic housings |
| • | Foreign material |
| • | Wear |
| • | Nicks |
| • | Scratches |