24 • 35-3001A-04-03 Carbon Monoxide Sample-Draw Detector
Removing the Particle Filter’s Tubing Stub, if Necessary
A short tubing stub comes factory installed in the particle filter. It is used for connecting the particle
filter to the inlet fitting. If you have installed the particle filter and no longer want it installed, you
will need to remove the particle filter’s tubing stub from the inlet fitting and replace it with tubing.
Figure 7: Inlet Fitting with Tubing Stub
CAUTION:
Do not pull the tubing stub downward to remove it.
1. Remove the particle filter from its tubing stub.
2. Unscrew the outside inlet fitting tube nut from the fitting body. The tubing stub should come
out with the tube nut. Be careful not to lose the O-ring that may come out with the tubing stub.
If you do lose the O-ring or if it is damaged, see “Parts List” on page 27 for the spare part
number.
3. Push the tubing stub up and out of the front ferrule being careful not to lose the ferrule set. If
you do lose the ferrule set or if it is damaged, see “Parts List” on page 27 for the spare part
numbers.
4. Push the new tubing up through the inlet fitting tube nut and replace the ferrule set and the O-
ring, if it came out, in the orientation shown in Figure 7.
5. Screw the inlet fitting tube nut back onto the fitting body. See “Connecting the Sample Lines to
the Sample-Draw Detector” on page 13 for instructions to install a new piece of tubing into the
fitting.
Outside of Case
Fitting Body
Front Ferrule
Back Ferrule
1/4" Tube
1/4" Tube
O-ring
Tube Nut
Inside of Case
