How to Identify Oil Contamination
If you suspect that your MicroBlaster is contaminated with oil, there are a few signs you can look for to confirm this.
1. Watch the Air Line Color
The air lines that run clean air through a Comco MicroBlaster are a milky-white color when new. Exposure to oil causes these air lines to turn orange or yellow color. Take a look at the air lines compared to the right.
2. Check for Oil Pools
Oil has a tendency to pool in the regulator assembly of a Comco micro-abrasive blaster. Unscrew the black plastic bonnet to see traces of oil inside the regulator. Use the images below to compare against your own blaster interior. (Note: This can be a difficult area to access.)
3. Look for Clumps
When oil contamination becomes severe, abrasive media adheres to the filter element. If you suspect severe oil contamination, open the assembly to expose the filter element and look for large clumps of abrasive. The image to the left show abrasive clumping due to oil contamination.
What Damage Can Oil Do?
How to Avoid Oil Contamination
While oil contamination can cause a major disaster inside your blaster, it is one of the easiest problems to avoid. The compressed air line running to a Comco MicroBlaster should pass through an oil filter and air dryer just before it reaches the unit. Not only does the oil filter protect the blaster components, but it also keeps oil from coating the desiccant or membrane filter inside the air dryer, prolonging its useful life.