Replacing the desiccant breather filter
The service life of the filters usually is 12 months, after that time the filters must be replaced. In case the filters are operated in a highly contaminated environment, the service life of the filters can be limited to 2 months or less. The color of the granulate indicates whether a filter needs to be replaced or whether it can still be used.
Color/color transition | Distribution of color gradient | Meaning | Action |
|---|---|---|---|
Blue → pink | Filter top → filter bottom | Moisture in the gear unit | Determine the cause |
Entirely pink or white | Entire filter | Filter capacity exhausted | Replace the filter |
Once the capacity of the filter is exhausted, the desiccant breather filters change their color from blue to pink, proceeding from the bottom of the filter to the top.
If the main part of the breather valve has changed its color to pink (or white after a longer time), the breather filter must be replaced by a new one.
If the color changes from top to bottom, this indicates that a large amount of moisture is in the gear unit.
