Teledyne First Responder CG User Handbook Manual page 57

To replace the filter disc, proceed as follows:
1. The yellow end cap is a push fit on to the probe
detector cap. Carefully pull then remove the end cap.
Note: If the cap is a tight fit, grip the cap then remove
using a twisting motion.
2. Using the hex driver (GMI Part No. 12451) or similar,
push the old filter out from the front end of the cap.
3. Fit a new filter disc in the end cap then use the
hex driver or similar flat ended instrument to make
sure that the filter is correctly seated in the end cap
internal recess.
Note: Care must be taken not to damage the filter.
4. The end cap is a push fit on the probe detector cap.
Push the end cap until it is securely located on the
probe collar.
Fig. 5-5 Filter Replacement
OPERATOR MAINTENANCE
5-5