• Remove the furnace cover by just loosening the nuts (16).
• Unscrew the knurled nuts (1) and washers (2).
• Unscrew the wing nuts (3).
• Unscrew the nuts (4) and detach the tubes (5).
• Remove the furnace cleaning system, by pulling the mounting (6).
• Unscrew the nut (7) and the detach tube (8).
• Unscrew the wing nuts (9) and pull down lower furnace lock (10).
• Pull-off the lower O-ring (12) from the combustion tube, remove the combustion tube (14)
by pulling it up; remove the upper O-ring (11).
• Apply a thin layer of grease on the inner surface of the new O-rings (11) and (12), before
mounting them. Apply a thin layer of grease on the outer surface of the combustion tube,
where the new O-rings will be placed.
• Reinstall in reverse order.
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