Emerson ROSEMOUNT OCX 8800 - Manual (Page 76)

Instruction Manual
IM-106-880, Rev 1.0
January 2007
OCX 8800
6-14
Remove Eductor
The O
2
cell and heater strut assembly (9, Figure 6-5) and the COe sensor
assembly (5, Figure 6-8) must be removed before you start this procedure.
1. Use straightedge to matchmark alignment of eductor flat and elbow, as
shown in Figure 6-10.
Figure 6-10. Eductor Alignment
Matchmarks
2. Unscrew terminal block mounting (13, Figure 6-8). Move terminal block
mounting away from eductor (6).
3. Unscrew eductor holder (14) with eductor (6) and fittings (12 and 15)
from sensor housing (7).
4. Clamp flats of eductor (6) in jaws of bench vise.
5. Use a propane torch to heat the eductor (6) to 450°F (232°C), minimum.
Apply the heat near the screw threads.
6. While heating the eductor (6), use wrench to apply removal torque to
elbow (12), eductor holder (14), or tube fitting (15) until the thread
sealant softens. Remove mating parts (12, 14, and 15).
7. Use MEK or methylene chloride solvent to clean thread sealant residue
from the pipe threads of the mating parts. Refer to applicable MSDS
sheet for solvent handling precautions.
37390036
Eductor Flat
Matchmark
Straightedge
Use heat resistant gloves when removing mating parts from the eductor. The mating parts
are bonded with a thread sealing compound. The compound softens at 450°F (232°C). The
heated parts can cause severe burns.