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Fig. 13 Prepare packing grooves and hubs
The next step involves preparing the nipples that will eventually seal the
boiler sections.
▶ Clean nipple with a rag soaked in solvents or gasoline and coat evenly
with sealant.
▶ Insert the nipple straight into the upper (Sz. 4.181.70) and lower
(Sz. 1, 82/50) hub of the rear section and pound home securely with
alternate heavy blows. Once pounded in, the upper nipple
( Fig. 14, [1]) must protrude approx. 1 – 49/64 inches (45 mm)
and the lower nipple approx. 1 – 3/8 inches (35 mm) out of the
corresponding hubs.
▶ Remove any burrs with a file.
2
Fig. 14 Driving nipples home
The packing grooves ( Fig. 15, [1]) must be clean and dry to enable
the sealant rope to adhere properly.
▶ Coat the packing grooves with adhesive (primer)
Logano G515 – 6 720 647 208 (2014/09)
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720 42 21-0 .1o
Fig. 15 Coat the packing grooves with adhesive (primer)
▶ Insert the flexible sealant rope ( Fig. 16, [2]) on the front of the
rear section, starting around the upper hub, into the packing grooves
( Fig. 16, [1]) and press in lightly. At the butt joints, overlap the
sealant rope by approx. 3/4" (20 mm) and press firmly together.
▶ Unroll the required length of sealant rope from the spool supplied.
▶ Peel the backing paper from the sealant rope when inserting into the
packing groove (do not stretch).
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1
Fig. 16 Inserting sealant rope
Preparation of the first intermediate section:
▶ File down any burrs on the hubs ( Fig. 12, page 14).
720 42 21-07.1o
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Boiler block assembly
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720 42 21-08.1o
2
720 42 21-09.1o
15
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