Emerson Rosemount OCX 8800 Reference Manual page 236

Maintenance and service
3.
4.
5.
6.
7.
Remove sample and exhaust tubes
Complete the following steps to remove the sample and exhaust tubes from the OCX
8800.
WARNING!
BURNS
Use heat resistant gloves when removing the probe tube or exhaust tube. The tubes are
bonded with a thread sealing compound. The compound softens at 232 °C (450 °F). The heated
parts can cause severe burns.
226
Unscrew the eductor holder (14) with eductor (6) and fittings (12 and 15) from the
sensor housing (7).
Clamp the flats of the eductor (6) in the jaws of the bench vise.
WARNING!
BURNS
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 232 °C
(450 °F). The heated parts can cause severe burns.
Use a propane torch to heat the eductor (6) to 232 °C (450 °F) minimum. Apply the
heat near the screw threads.
While heating the eductor (6), use a wrench to apply removal torque to the elbow
(12), eductor holder (14), or tube fitting (15) until the thread sealant softens.
Remove the mating parts (12, 14, and 15).
Use MEK or methylene chloride solvent to clean thread sealant residue from the pipe
threads of the mating parts. Refer to the applicable MSDS sheet for solvent handling
precautions.
OCX 8800