Chapter 8 — Inspection and Maintenance
8-24 Part No. 750-184
After opening the rear door, clean the flange with a scraper or wire brush.
Clean the surface of the refractory carefully with a fiber brush to avoid
damaging the surface. Clean the mating surfaces of the baffle and the boiler
shell. Remove all dried sealing material.
Remove the old rope from the rear door baffle. Be careful not to chip or crack
the refractory. Apply spray adhesive (P/N 797-1813) to the groove in the
baffle and attach a new length of 1-1/2" diameter fiberglass rope (P/N 853-
1036) to the groove. Be certain that the rope is properly positioned. Wash-
coat the lower half of the rear door refractory prior to closing.
Closing and Sealing
CB-LE — Attach new tadpole gasket with fasteners 841-00507. Apply
spray adhesive 797-1813 around the inner circumference of the gasket and
across the baffle seal area of the tube sheet. Apply blanket insulation 872-
1073 to this area. Refer to Figure 8-3.
CB-OS — Attach new tadpole gasket with fasteners 841-00507. Apply
spray adhesive 797-1813 around the inner circumference of the gasket.
Apply blanket insulation 872-1073 to this area. Refer to Figure 8-3.
Apply spray adhesive to the refractory-to-tubesheet seal area (see detail,
Figure 8-3). Apply blanket insulation 872-1073 to this area.
NOTE:
CB 880- gasket kits do not include blanket insulation. When re-
sealing using a CB-supplied gasket kit, the area around the inside
of the tadpole gasket may be sealed using the supplied rope in
place of the blanket insulation. First, replace tadpole gasket as
above. Coat gasket with an oil and graphite mixture. Apply a small
amount of a pulp mixture, consisting of 872-00026 cement and
water, around the inner circumference of the gasket. Press rope
into this area. After the rope is installed, coat the entire rope and
gasket area with the pulp mixture.
See also Chapter 9 - Parts, pp 9-47 and 9-48.
Figure 8-4 Gasket and Insulation — CB-LE
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